[bpt/emacs.git] / man / mh-e.texi

\input texinfo   @c -*-texinfo-*-
@c
@c Note: This document requires makeinfo version 4.6 or greater to build.
@c
@c %**start of header
@setfilename ../info/mh-e
@settitle The MH-E Manual
@c %**end of header

@c Version of the software and manual.
@set VERSION 8.0
@c Edition of the manual. It is either empty for the first edition or
@c has the form ", nth Edition" (without the quotes).
@set EDITION 
@set UPDATED 2006-05-06
@set UPDATE-MONTH May, 2006

@c Other variables.
@set MH-BOOK-HOME http://rand-mh.sourceforge.net/book/mh
@set MH-E-HOME http://mh-e.sourceforge.net/

@c Copyright
@copying
This is version @value{VERSION}@value{EDITION} of @cite{The MH-E
Manual}, last updated @value{UPDATED}.

Copyright @copyright{} 1995, 2001, 2002, 2003, 2005, 2006 Free
Software Foundation, Inc.

@quotation
The MH-E manual is free documentation; you can redistribute it and/or
modify it under the terms of either:

@enumerate a
@item
the GNU Free Documentation License, Version 1.2 or any later version
published by the Free Software Foundation; with no Invariant Sections,
no Front-Cover Texts, and no Back-Cover Texts.

@item
the GNU General Public License as published by the Free Software
Foundation; either version 2, or (at your option) any later version.
@end enumerate

The MH-E manual is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License or GNU Free Documentation License for more
details.

The GNU General Public License and the GNU Free Documentation License
appear as appendices to this document. You may also request copies by
writing to the Free Software Foundation, Inc., 51 Franklin Street,
Fifth Floor, Boston, MA 02110-1301, USA.
@end quotation
@end copying

@c Info Directory Entry
@dircategory Emacs
@direntry
* MH-E: (mh-e).		Emacs interface to the MH mail system.
@end direntry

@c Title Page
@setchapternewpage odd
@titlepage
@title The MH-E Manual
@subtitle Version @value{VERSION}@value{EDITION}
@subtitle @value{UPDATE-MONTH}
@author Bill Wohler

@c Copyright Page
@page
@vskip 0pt plus 1filll
@insertcopying
@end titlepage

@ifnottex
@html
<!--
@end html
@node Top, Preface, (dir), (dir)
@top The MH-E Manual
@html
-->
@end html
@insertcopying
@end ifnottex

@c Table of Contents
@contents

@html
<!--
@end html

@menu
* Preface::                     Preface
* Conventions::                 GNU Emacs Terms and Conventions
* Getting Started::             Getting Started
* Tour Through MH-E::           Tour Through MH-E
* Using This Manual::           Using This Manual
* Incorporating Mail::          Incorporating Mail
* Reading Mail::                Reading Mail
* Folders::                     Organizing Your Mail with Folders
* Sending Mail::                Sending Mail
* Editing Drafts::              Editing a Draft
* Aliases::                     Aliases
* Identities::                  Identities
* Speedbar::                    The Speedbar
* Menu Bar::                    The Menu Bar
* Tool Bar::                    The Tool Bar
* Searching::                   Searching Through Messages
* Threading::                   Viewing Message Threads
* Limits::                      Limiting Display
* Sequences::                   Using Sequences
* Junk::                        Dealing With Junk Mail
* Miscellaneous::               Miscellaneous Commands, Variables, and Buffers
* Scan Line Formats::           Scan Line Formats
* Procmail::                    Reading Mailing Lists Effectively
* Odds and Ends::               Odds and Ends
* History::                     History of MH-E
* GFDL::                        GNU Free Documentation License
* GPL::                         GNU Public License
* Key Index::                   Key (Character) Index
* Command Index::               Command Index
* Option Index::                Option (Variable) Index
* Concept Index::               Concept Index

@detailmenu
 --- The Detailed Node Listing ---

Tour Through MH-E

* Sending Mail Tour::           
* Reading Mail Tour::           
* Processing Mail Tour::        
* Leaving MH-E::                
* More About MH-E::             

Using This Manual

* Options::                     
* Ranges::                      
* Folder Selection::            

Reading Your Mail

* Viewing::                     
* Viewing Attachments::         
* HTML::                        
* Digests::                     
* Reading PGP::                 
* Printing::                    
* Files and Pipes::             
* Navigating::                  
* Miscellaneous Commands and Options::  

Sending Mail

* Composing::                   
* Replying::                    
* Forwarding::                  
* Redistributing::              
* Editing Again::               

Editing a Draft

* Editing Message::             
* Inserting Letter::            
* Inserting Messages::          
* Signature::                   
* Picture::                     
* Adding Attachments::          
* Sending PGP::                 
* Checking Recipients::         
* Sending Message::             
* Killing Draft::               

Odds and Ends

* Bug Reports::                 
* Mailing Lists::               
* MH FAQ and Support::          
* Getting MH-E::                

History of MH-E

* From Brian Reid::             
* From Jim Larus::              
* From Stephen Gildea::         
* From Bill Wohler::            

@end detailmenu
@end menu

@html
-->
@end html

@node Preface, Conventions, Top, Top
@unnumbered Preface

@cindex Emacs
@cindex Unix commands, Emacs
@cindex preface

This manual introduces another interface to the MH mail system that is
accessible through the GNU Emacs editor, namely, @emph{MH-E}. MH-E is
easy to use. I don't assume that you know GNU Emacs or even MH at this
point, since I didn't know either of them when I discovered MH-E.
However, MH-E was the tip of the iceberg, and I discovered more and
more niceties about GNU Emacs and MH@. Now I'm fully hooked on both of
them.

The MH-E package is distributed with GNU Emacs@footnote{Version
@value{VERSION} of MH-E will appear in GNU Emacs 22.1. It is supported
in GNU Emacs 21, as well as XEmacs 21 (except for versions
21.5.9-21.5.16). It is compatible with MH versions 6.8.4 and higher,
all versions of nmh, and GNU mailutils 0.4 and higher.}, so you
shouldn't have to do anything special to use it. This manual covers
MH-E version @value{VERSION}. To help you decide which version you
have, see @ref{Getting Started}.

@findex help-with-tutorial
@kindex C-h t

If you don't already use GNU Emacs but want to learn more, you can
read an online tutorial by starting GNU Emacs and typing @kbd{C-h t}
(@code{help-with-tutorial}). (To learn about this notation, see
@ref{Conventions}.) If you want to take the plunge, consult the
@iftex
@cite{GNU Emacs Manual},
@end iftex
@ifinfo
@ref{top, , GNU Emacs Manual, emacs, GNU Emacs Manual},
@end ifinfo
@ifhtml
@uref{http://www.gnu.org/software/emacs/manual/html_node/,
@cite{GNU Emacs Manual}},
@end ifhtml
from the Free Software Foundation.

If more information is needed, you can go to the Unix manual pages of
the individual MH commands. When the name is not obvious, I'll guide
you to a relevant MH manual page that describes the action more fully.

@cindex @cite{MH & nmh: Email for Users & Programmers}
@cindex MH book
@cindex info
@kindex C-h i

This manual is available in both Info and online formats. The Info
version is distributed with Emacs and can be accessed with the
@command{info} command (@samp{info mh-e}) or within Emacs (@kbd{C-h i
m mh-e @key{RET}}). The online version is available at
@uref{http://mh-e.sourceforge.net/manual/, SourceForge}. Another great
online resource is the book @uref{http://www.ics.uci.edu/~mh/book/,
@cite{MH & nmh: Email for Users & Programmers}} (also known as
@dfn{the MH book}).

I hope you enjoy this manual! If you have any comments, or suggestions
for this document, please let me know.

@cindex Bill Wohler
@cindex Wohler, Bill

@noindent
Bill Wohler <@i{wohler at newt.com}>@*
8 February 1995@*
24 February 2006

@node Conventions, Getting Started, Preface, Top
@chapter GNU Emacs Terms and Conventions

@cindex Emacs
@cindex Emacs, conventions
@cindex Emacs, terms
@cindex Unix commands, Emacs
@cindex conventions, Emacs
@cindex terms, Emacs

If you're an experienced Emacs user, you can skip the following
conventions and definition of terms and go directly to the next
section (@pxref{Getting Started}).

@cindex Emacs commands
@cindex MH commands
@cindex Unix commands
@cindex commands
@cindex commands, MH
@cindex commands, Unix
@cindex commands, shell
@cindex functions
@cindex shell commands

In general, @dfn{functions} in this text refer to Emacs Lisp functions
that one would call from within Emacs Lisp programs (for example,
@code{(mh-inc-folder)}). On the other hand, @dfn{commands} are those
things that are run by the user, such as @kbd{i} or @kbd{M-x
mh-inc-folder}. Programs outside of Emacs are specifically called MH
commands, shell commands, or Unix commands.

@cindex conventions, key names
@cindex key names

The conventions for key names are as follows:

@table @kbd
@item C-x
Hold down the @key{CTRL} (Control) key and press the @kbd{x} key.
@c -------------------------
@item M-x
Hold down the @key{META} or @key{ALT} key and press the @kbd{x} key.

Since some keyboards don't have a @key{META} key, you can generate
@kbd{M-x}, for example, by pressing @key{ESC} (Escape),
@emph{releasing it}, and then pressing the @kbd{x} key.
@c -------------------------
@item @key{RET}
Press the @key{RETURN} or @key{ENTER} key. This is normally used to
complete a command.
@c -------------------------
@item @key{SPC}
Press the space bar.
@c -------------------------
@item @key{TAB}
Press the @key{TAB} key.
@c -------------------------
@item @key{DEL}
Press the @key{DELETE} key.
@c -------------------------
@item @key{BS}
Press the @key{BACKSPACE} key@footnote{If you are using Version 20 or
earlier of Emacs, you will need to use the @key{DEL} key.}.
@end table

@cindex Emacs, prefix argument
@cindex prefix argument
@kindex C-u

A @dfn{prefix argument} allows you to pass an argument to any Emacs
function. To pass an argument, type @kbd{C-u} before the Emacs command
or keystroke. Numeric arguments can be passed as well. For example, to
insert five f's, use @kbd{C-u 5 f}. There is a default of four when
using @kbd{C-u}, and you can use multiple prefix arguments to provide
arguments of powers of four. To continue our example, you could insert
four f's with @kbd{C-u f}, 16 f's with @kbd{C-u C-u f}, 64 f's with
@kbd{C-u C-u C-u f}, and so on. Numeric and valueless negative
arguments can also be inserted with the @key{META} key. Examples
include @kbd{M-5} to specify an argument of 5, or @kbd{M--} which
specifies a negative argument with no particular value.

@sp 1
@center @strong{NOTE}

@quotation
The prefix @kbd{C-u} or @kbd{M-} is not necessary in MH-E's MH-Folder
mode (@pxref{Reading Mail Tour}). In this mode, simply enter the
numerical argument before entering the command.
@end quotation
@sp 1
 
@cindex @file{.emacs}
@cindex Emacs, variables
@cindex files, @file{.emacs}
@cindex variables
@findex setq

Emacs uses @dfn{variables} to hold values. These can be changed via
calls to the function @code{setq} in @file{~/.emacs}.

@cindex Emacs, options
@cindex options
@findex customize-group
@findex customize-option

Variables in MH-E that are normally modified by the user are called
@dfn{options} and are modified through the customize functions (such
as @kbd{M-x customize-option} or @kbd{M-x customize-group}).
@ifnothtml
@xref{Easy Customization,,,emacs,The GNU Emacs Manual}, in @cite{The
GNU Emacs Manual}.
@end ifnothtml
@ifhtml
See section
@uref{http://www.gnu.org/software/emacs/manual/html_node/Easy-Customization.html,
Easy Customization} in @cite{The GNU Emacs Manual}.
@end ifhtml
@xref{Options}.

@cindex Emacs, faces
@cindex faces
@cindex highlighting
@findex customize-face

You can specify various styles for displaying text using @dfn{faces}.
MH-E provides a set of faces that you can use to personalize the look
of your MH-E buffers. Use the command @kbd{M-x customize-face} to do
this.
@ifnothtml
@xref{Face Customization,,,emacs,The GNU Emacs Manual}, in @cite{The
GNU Emacs Manual}.
@end ifnothtml
@ifhtml
See section
@uref{http://www.gnu.org/software/emacs/manual/html_node/Face-Customization.html,
Face Customization} in @cite{The GNU Emacs Manual}.
@end ifhtml

@cindex abnormal hooks
@cindex hooks
@cindex normal hooks
@findex add-hook
@findex customize-option

Commands often offer @dfn{hooks} which enable you to extend or modify
the way a command works. 
@ifnothtml
@ref{Hooks, , Hooks, emacs, The GNU Emacs Manual}, in @cite{The GNU
Emacs Manual}
@end ifnothtml
@ifhtml
See section
@uref{http://www.gnu.org/software/emacs/manual/html_node/Hooks.html,
Hooks} in @cite{The GNU Emacs Manual}
@end ifhtml
for a description about @dfn{normal hooks} and @dfn{abnormal hooks}.
MH-E uses normal hooks in nearly all cases, so you can assume that we
are talking about normal hooks unless we explicitly mention that a
hook is abnormal. We also follow the conventions described in that
section: the name of the abnormal hooks end in @code{-hooks} and all
the rest of the MH-E hooks end in @code{-hook}. You can add hooks with
either @code{customize-option} or @code{add-hook}.

@cindex Emacs, mark
@cindex Emacs, point
@cindex Emacs, region
@cindex mark
@cindex point
@cindex region
@kindex C-@@
@kindex C-@key{SPC}

There are several other terms that are used in Emacs that you should
know. The @dfn{point} is where the cursor currently is. You can save
your current place in the file by setting a @dfn{mark}. This operation
is useful in several ways. The mark can be later used when defining a
@dfn{region}, which is the text between the point and mark. Many
commands operate on regions, such as those for deleting text or
filling paragraphs. A mark can be set with @kbd{C-@@} (or
@kbd{C-@key{SPC}}).

@cindex completion
@cindex Emacs, completion
@cindex Emacs, file completion
@cindex Emacs, folder completion
@cindex Emacs, minibuffer
@cindex file completion
@cindex folder completion
@cindex minibuffer
@kindex SPC
@kindex TAB

The @dfn{minibuffer} is the bottom line of the Emacs window, where all
prompting and multiple-character input is directed. You can use
@dfn{completion} to enter values such as folders. Completion means
that Emacs fills in text for you when you type @key{SPC} or @key{TAB}.
A second @key{SPC} or @key{TAB} will list all possibilities at that
point.
@ifnothtml
@xref{Completion, , Completion, emacs, The GNU Emacs Manual}.
@end ifnothtml
@ifhtml
See the section
@uref{http://www.gnu.org/software/emacs/manual/html_node/Completion.html,
Completion} in @cite{The GNU Emacs Manual}.
@end ifhtml
Note that @key{SPC} cannot be used for completing filenames and
folders.

@findex help-with-tutorial
@kindex C-h t
@kindex M-x

The minibuffer is also where you enter Emacs function names after
typing @kbd{M-x}. For example, in the preface, I mentioned that you
could obtain help with @kbd{C-h t} (@code{help-with-tutorial}). What
this means is that you can get a tutorial by typing either @kbd{C-h t}
or @kbd{M-x help-with-tutorial}. In the latter case, you are prompted
for @samp{help-with-tutorial} in the minibuffer after typing
@kbd{M-x}.

@cindex ~

The @samp{~} notation in filenames represents your home directory.
This notation is used by many shells including @command{bash},
@code{tcsh}, and @command{csh}. It is analogous to the environment
variable @samp{$HOME}. For example, @file{~/.emacs} can be written
@file{$HOME/.emacs} or using the absolute path as in
@file{/home/wohler/.emacs} instead.

@cindex Emacs, interrupting
@cindex Emacs, quitting
@cindex interrupting
@cindex quitting

@i{In case of trouble:} Emacs can be interrupted at any time with
@kbd{C-g}. For example, if you've started a command that requests that
you enter something in the minibuffer, but then you change your mind,
type @kbd{C-g} and you'll be back where you started. If you want to
exit Emacs entirely, use @kbd{C-x C-c}.

@node Getting Started, Tour Through MH-E, Conventions, Top
@chapter Getting Started

@cindex MH-E, versions
@cindex history
@cindex versions of MH-E

Because there are many old versions of MH-E out there, it is important
to know which version you have. I'll be talking about @w{Version 8}
which is pretty close to @w{Version 6} and @w{Version 7}. It differs
from @w{Version 4} and @w{Version 5} and is vastly different from
@w{Version 3}. @xref{History}.

@findex mh-version

To determine which version of MH-E that you have, enter @kbd{M-x
mh-version @key{RET}}. Hopefully it says that you're running
@w{Version @value{VERSION}} which is the latest version as of this
printing.

If your version is much older than this, please consider upgrading.
You can have your system administrator upgrade the system-wide
version, or you can install your own personal version. It's really
quite easy. @xref{Getting MH-E}, for instructions for getting and
installing MH-E.

If the @code{mh-version} command displays @samp{No MH variant
detected}@footnote{In very old versions of MH-E, you may get the error
message, @samp{Cannot find the commands `inc' and `mhl' and the file
`components'} if MH-E can't find MH. In this case, you need to update
MH-E, and you may need to install MH too. However, newer versions of
MH-E are better at finding MH if it is on your system.}, then you need
to install MH or tell MH-E where to find MH.

@cindex Debian
@cindex nmh
@cindex GNU mailutils

If you don't have MH on your system already, you must install a
variant of MH. The Debian mh-e package does this for you automatically
(@pxref{Getting MH-E}). Most people use
@uref{http://www.nongnu.org/nmh/, nmh}, but you may be interested in
trying out @uref{http://www.gnu.org/software/mailutils/, GNU
mailutils}, which supports IMAP. Your GNU/Linux distribution probably
has packages for both of these.

@cindex @command{install-mh}
@cindex MH commands, @command{install-mh}
@cindex MH book

If you've never run MH before, you need to run @command{install-mh}
from the shell before you continue. This sets up your personal MH
environment@footnote{See the section
@uref{@value{MH-BOOK-HOME}/../overall/setup.html, Setting Up MH} in the
MH book.}. If you don't, you'll be greeted with the error message:
@samp{Install MH and run install-mh before running MH-E}. This is all
you need to know about MH to use MH-E, but the more you know about MH,
the more you can leverage its power. See the
@uref{@value{MH-BOOK-HOME}/../, MH book} to learn more about MH.

@cindex @samp{Path:} MH profile component
@cindex MH profile
@cindex MH profile component
@cindex MH profile component, @samp{Path:}

Your MH environment includes your @dfn{MH profile} which is found in
the file @file{~/.mh_profile}. This file contains a number of @dfn{MH
profile components}. For example, the @samp{Path:} MH profile
component contains the path to your mail directory, which is
@file{~/Mail} by default.

@cindex @command{mhparam}
@cindex MH commands, @command{mhparam}
@vindex exec-path
@vindex mh-path
@vindex mh-sys-path
@vindex mh-variant
@vindex mh-variant-in-use

There are several options MH-E uses to interact with your MH
installation. The option @code{mh-variant} specifies the variant used
by MH-E (@pxref{Options}). The default setting of this option is
@samp{Auto-detect} which means that MH-E will automatically choose the
first of nmh, MH, or GNU mailutils that it finds in the directories
listed in @code{mh-path} (which you can customize),
@code{mh-sys-path}, and @code{exec-path}. If MH-E can't find MH at
all, you may have to customize @code{mh-path} and add the directory in
which the command @command{mhparam} is located. If, on the other hand,
you have both nmh and mailutils installed (for example) and
@code{mh-variant-in-use} was initialized to nmh but you want to use
mailutils, then you can set @code{mh-variant} to @samp{mailutils}.

@vindex mh-flists-present-flag
@vindex mh-lib
@vindex mh-lib-progs
@vindex mh-progs

When @code{mh-variant} is changed, MH-E resets @code{mh-progs},
@code{mh-lib}, @code{mh-lib-progs}, @code{mh-flists-present-flag}, and
@code{mh-variant-in-use} accordingly.

@cindex @file{.emacs}
@cindex files, @file{.emacs}

@sp 1
@center @strong{NOTE}

@quotation
Prior to version 8, it was often necessary to set some of these
variables in @file{~/.emacs}; now it is no longer necessary and can
actually cause problems.
@end quotation
@sp 1

@cindex MH profile component, @samp{Draft-Folder:}
@cindex MH profile component, @samp{Path:}
@cindex MH profile component, @samp{Previous-Sequence:}
@cindex MH profile component, @samp{Unseen-Sequence:}
@cindex @samp{Draft-Folder:} MH profile component
@cindex @samp{Path:} MH profile component
@cindex @samp{Previous-Sequence:} MH profile component
@cindex @samp{Unseen-Sequence:} MH profile component
@findex mh-find-path
@vindex mh-draft-folder
@vindex mh-find-path-hook
@vindex mh-inbox
@vindex mh-previous-seq
@vindex mh-unseen-seq
@vindex mh-user-path

In addition to setting variables that point to MH itself, MH-E also
sets a handful of variables that point to where you keep your mail.
During initialization, the function @code{mh-find-path} sets
@code{mh-user-path} from your @samp{Path:} MH profile component (but
defaults to @samp{Mail} if one isn't present), @code{mh-draft-folder}
from @samp{Draft-Folder:}, @code{mh-unseen-seq} from
@samp{Unseen-Sequence:}, @code{mh-previous-seq} from
@samp{Previous-Sequence:}, and @code{mh-inbox} from @samp{Inbox:}
(defaults to @samp{+inbox}). The hook @code{mh-find-path-hook} is run
after these variables have been set. This hook can be used the change
the value of these variables if you need to run with different values
between MH and MH-E.

@node Tour Through MH-E, Using This Manual, Getting Started, Top
@chapter Tour Through MH-E

@cindex introduction
@cindex tour
@cindex tutorial

This chapter introduces some of the terms you'll need to know and then
takes you on a tour of MH-E@footnote{The keys mentioned in these
chapters refer to the default key bindings. If you've changed the
bindings, refer to the command summaries at the beginning of each
chapter for a mapping between default key bindings and function
names.}. When you're done, you'll be able to send, read, and file
mail, which is all that a lot of people ever do. But if you're the
curious or adventurous type, read the rest of the manual to be able to
use all the features of MH-E. I suggest you read this chapter first to
get the big picture, and then you can read the manual as you wish.

@menu
* Sending Mail Tour::           
* Reading Mail Tour::           
* Processing Mail Tour::        
* Leaving MH-E::                
* More About MH-E::             
@end menu

@node Sending Mail Tour, Reading Mail Tour, Tour Through MH-E, Tour Through MH-E
@section Sending Mail

@cindex MH-Letter mode
@cindex mode
@cindex modes, MH-Letter
@cindex sending mail
@findex mh-smail
@kindex M-x mh-smail

Let's start our tour by sending ourselves a message which we can later
read and process. Enter @kbd{M-x mh-smail} to invoke the MH-E program
to send messages. Your message appears in an Emacs buffer whose
mode@footnote{A @dfn{mode} changes Emacs to make it easier to edit a
particular type of text.} is MH-Letter.

Enter your login name in the @samp{To:} header field. Press the
@key{TAB} twice to move the cursor past the @samp{Cc:} field, since no
carbon copies are to be sent, and on to the @samp{Subject:} field.
Enter @kbd{Test} or anything else that comes to mind.

Press @key{TAB} again to move the cursor to the body of the message.
Enter some text, using normal Emacs commands. You should now have
something like this@footnote{If you're running Emacs under the X
Window System, then you would also see a menu bar and a tool bar. I've
left out the menu bar and tool bar in all of the example screens.}:

@cartouche
@smallexample


--:--  *scratch*   All L1     (Lisp Interaction)-------------------------
To: wohler
cc:
Subject: Test
X-Mailer: MH-E 8.0; nmh 1.1; GNU Emacs 22.1
--------
This is a test message to get the wheels churning...#


--:**  @{draft@}   All L5     (MH-Letter)----------------------------------
Type C-c C-c to send message, C-C ? for help
@end smallexample
@end cartouche
@i{MH-E message composition window}

Note the line of dashes that separates the header and the body of the
message. It is essential that these dashes (or a blank line) are
present or the body of your message will be considered to be part of
the header.

@cindex help
@findex describe-mode
@kindex C-c ?
@kindex C-c C-c
@kindex C-h m

There are several commands specific to MH-Letter mode@footnote{You can
get quick help for the commands used most often with @kbd{C-c ?} or
more complete help with the @kbd{C-h m} (@code{describe-mode})
command.}, but at this time we'll only use @kbd{C-c C-c} to send your
message. Type @kbd{C-c C-c} now. That's all there is to it!

@node Reading Mail Tour, Processing Mail Tour, Sending Mail Tour, Tour Through MH-E
@section Receiving Mail

@cindex @command{inc}
@cindex @command{scan}
@cindex MH commands, @command{inc}
@cindex MH commands, @command{scan}
@cindex MH-Folder mode
@cindex modes, MH-Folder
@cindex reading mail
@findex mh-rmail
@kindex M-x mh-rmail

To read the mail you've just sent yourself, enter @kbd{M-x mh-rmail}.
This incorporates the new mail and puts the output from
@command{inc}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/reapre.html, Reading Mail: inc show next
prev} in the MH book.} (called @dfn{scan lines} after the MH program
@command{scan}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/faswsprs.html, Find and Specify with scan
pick Ranges Sequences} in the MH book.} which prints a one-line
summary of each message) into a buffer called @samp{+inbox} whose
major mode is MH-Folder.

@findex mh-rmail
@kindex F r
@kindex M-x mh-rmail

@sp 1
@center @strong{NOTE}

@quotation

The @kbd{M-x mh-rmail} command will show you only new mail, not mail
you have already read. If you were to run this tour again, you would
use @kbd{F r} to pull all your messages into MH-E.
@end quotation
@sp 1

@kindex @key{RET}
@kindex n
@kindex p

You should see the scan line for your message, and perhaps others. Use
@kbd{n} or @kbd{p} to move the cursor to your test message and type
@key{RET} to read your message. You should see something like:

@cartouche
@smallexample
  3 t08/24 root       received fax files on Wed Aug 24 11:00:13 PDT 1
# 4+t08/24 To:wohler  Test<<This is a test message to get the wheels

-:%%  @{+inbox/select@} 4 msgs (1-4)   Bot L4     (MH-Folder Show)---------
To: wohler
Subject: Test
X-Mailer: MH-E 8.0; nmh 1.1; GNU Emacs 22.1
Date: Fri, 17 Mar 2006 10:49:11 -0800
From: Bill Wohler <wohler@@stop.mail-abuse.org>

This is a test message to get the wheels churning...


--:--  @{show-+inbox@} 4   All L1     (MH-Show)----------------------------

@end smallexample
@end cartouche
@i{After incorporating new messages}

@kindex @key{DEL}
@kindex @key{SPC}

If you typed a long message, you can view subsequent pages with
@key{SPC} and previous pages with @key{DEL}.

@node Processing Mail Tour, Leaving MH-E, Reading Mail Tour, Tour Through MH-E
@section Processing Mail

@cindex processing mail
@kindex @key{RET}
@kindex r

The first thing we want to do is reply to the message that we sent
ourselves. Ensure that the cursor is still on the same line as your
test message and type @kbd{r}. You are prompted in the minibuffer with
@samp{Reply to whom:}. Here MH-E is asking whether you'd like to reply
to the original sender only, to the sender and primary recipients, or
to the sender and all recipients. You can press @key{TAB} to see these
choices. If you simply press @key{RET}, you'll reply only to the
sender. Press @key{RET} now.

You'll find yourself in an Emacs buffer similar to that when you were
sending the original message, like this:

@cartouche
@smallexample
To: 
cc: 
Subject: Re: Test 
In-reply-to: <31054.1142621351@@stop.mail-abuse.org> 
References: <31054.1142621351@@stop.mail-abuse.org>
Comments: In-reply-to Bill Wohler <wohler@@stop.mail-abuse.org>
   message dated "Fri, 17 Mar 2006 10:49:11 -0800."
X-Mailer: MH-E 8.0; nmh 1.1; GNU Emacs 22.1
--------
#

--:--  @{draft@}  All L10     (MH-Letter)----------------------------------
To: wohler
Subject: Test
X-Mailer: MH-E 8.0; nmh 1.1; GNU Emacs 22.1
Date: Fri, 17 Mar 2006 10:49:11 -0800
From: Bill Wohler <wohler@@stop.mail-abuse.org>

This is a test message to get the wheels churning...

--:--  @{show-+inbox@} 4   All L1     (MH-Show)----------------------------
Type C-c C-c to send message, C-c ? for help
@end smallexample
@end cartouche
@i{Composition window during reply}

@findex backward-char
@findex forward-char
@findex next-line
@findex previous-line
@kindex C-b
@kindex C-c C-c
@kindex C-c C-f C-t
@kindex C-f
@kindex C-n
@kindex C-p
@kindex @key{BS}

By default, MH will not add you to the address list of your replies,
so if you find that the @samp{To:} header field is missing, don't
worry. In this case, type @kbd{C-c C-f C-t} to create and go to the
@samp{To:} field, where you can type your login name again. You can
move around with the arrow keys or with @kbd{C-p}
(@code{previous-line}), @kbd{C-n} (@code{next-line}), @kbd{C-b}
(@code{backward-char}), and @kbd{C-f} (@code{forward-char}) and can
delete the previous character with @key{BS}. When you're finished
editing your message, send it with @kbd{C-c C-c} as before.

@cindex @command{refile}
@cindex MH commands, @command{refile}
@cindex folders
@kindex @key{SPC}
@kindex o

You'll often want to save messages that were sent to you in an
organized fashion. This is done with @dfn{folders}. You can use
folders to keep messages from your friends, or messages related to a
particular topic. With your cursor in the MH-Folder buffer and
positioned on the message you sent to yourself, type @kbd{o} to output
(@command{refile} in MH parlance) that message to a folder. Enter
@kbd{test} at the @samp{Destination folder:} prompt and type @kbd{y}
(or @key{SPC}) when MH-E asks to create the folder @samp{+test}. Note
that a @samp{^} (caret) appears next to the message number, which
means that the message has been marked for refiling but has not yet
been refiled. We'll talk about how the refile is actually carried out
in a moment.

@cindex MH-Folder mode
@cindex modes, MH-Folder
@kindex d
@kindex i
@kindex @key{RET}
@kindex n
@kindex p
@kindex x

Your previous reply is now waiting in the system mailbox. You
incorporate this mail into your MH-Folder buffer named @samp{+inbox}
with the @kbd{i} command. Do this now. After the mail is incorporated,
use @kbd{n} or @kbd{p} to move the cursor to the new message, and read
it with @key{RET}. Let's delete this message by typing @kbd{d}. Note
that a @samp{D} appears next to the message number. This means that
the message is marked for deletion but is not yet deleted. To perform
the deletion (and the refile we did previously), use the @kbd{x}
command.

@findex mh-smail
@kindex m
@kindex M-x mh-smail

If you want to send another message you can use @kbd{m} instead of
@kbd{M-x mh-smail}. So go ahead, send some mail to your friends!

@cindex help
@cindex prefix characters
@findex describe-mode
@kindex ?
@kindex C-h m
@kindex F ?

You can get a quick reminder about these commands by typing @kbd{?}.
This lists several @dfn{prefix characters}. To list the commands
available via the prefix characters, type the prefix character
followed by a @kbd{?}, for example, @kbd{F ?}. More complete help is
available with the @kbd{C-h m} (@code{describe-mode}) command.

@node Leaving MH-E, More About MH-E, Processing Mail Tour, Tour Through MH-E
@section Leaving MH-E

@cindex Emacs, quitting
@cindex quitting
@kindex C-x C-c
@kindex x

You may now wish to exit @command{emacs} entirely. Use @kbd{C-x C-c}
to exit @command{emacs}. If you exited without running @kbd{x} in the
@samp{+inbox} buffer, Emacs will offer to save it for you. Type
@kbd{y} or @key{SPC} to save @samp{+inbox} changes, which means to
perform any refiles and deletes that you did there.

@findex mh-rmail
@kindex C-x b
@kindex C-x k
@kindex M-x mh-rmail
@kindex q

If you don't want to leave Emacs, you can type @kbd{q} to bury (hide)
the MH-E folder or delete it entirely with @kbd{C-x k}. You can then
later recall it with @kbd{C-x b} or @kbd{M-x mh-rmail}.

@cindex @command{packf}
@cindex MH commands, @command{packf}
@cindex exporting folders
@cindex folders, exporting
@cindex mbox-style folder

On the other hand, if you no longer want to use MH and MH-E, you can
take your mail with you. You can copy all of your mail into a single
file, mbox-style, by using the MH command @command{packf}. For
example, to create a file called @file{msgbox} with the messages in
your @samp{+inbox} folder, use @samp{packf +inbox}. The
@command{packf} command will append the messages to the file if it
already exists, so you can use @samp{folders -recurse -fast} in a
script to copy all of your messages into a single file, or using the
@samp{-file} argument, a file for each folder.

@node More About MH-E,  , Leaving MH-E, Tour Through MH-E
@section More About MH-E

These are the basic commands to get you going, but there are plenty
more. If you think that MH-E is for you, read the rest of the manual
to find out how you can:

@itemize @bullet
@item
Print your messages (@pxref{Printing}).
@c -------------------------
@item
Edit messages and include your signature (@pxref{Editing Drafts}).
@c -------------------------
@item
Forward messages (@pxref{Forwarding}).
@c -------------------------
@item
Read digests (@pxref{Digests}).
@c -------------------------
@item
Edit bounced messages (@pxref{Editing Again}).
@c -------------------------
@item
Send multimedia messages (@pxref{Adding Attachments}).
@c -------------------------
@item
Read HTML messages (@pxref{HTML}).
@c -------------------------
@item
Use aliases and identities (see @ref{Aliases}, @pxref{Identities}).
@c -------------------------
@item
Create different views of your mail (see @ref{Threading}, @pxref{Limits}).
@c -------------------------
@item
Deal with junk mail (@pxref{Junk}).
@c -------------------------
@item
Handle signed and encrypted messages (see @ref{Reading PGP},
@pxref{Sending PGP}).
@c -------------------------
@item
Process mail that was sent with @command{shar} or @command{uuencode}
(@pxref{Files and Pipes}).
@c -------------------------
@item
Use sequences conveniently (@pxref{Sequences}).
@c -------------------------
@item
Use the speedbar, tool bar, and menu bar (see @ref{Speedbar}, see @ref{Tool
Bar}, @pxref{Menu Bar}).
@c -------------------------
@item
Show header fields in different fonts (@pxref{Reading Mail}).
@c -------------------------
@item
Find previously refiled messages (@pxref{Searching}).
@c -------------------------
@item
Place messages in a file (@pxref{Files and Pipes}).
@end itemize

Remember that you can also use MH commands when you're not running
MH-E (and when you are!).

@node Using This Manual, Incorporating Mail, Tour Through MH-E, Top
@chapter Using This Manual

This chapter begins the meat of the manual which goes into more detail
about every MH-E command and option.

@cindex Emacs, info
@cindex Emacs, online help
@cindex info
@cindex online help
@findex describe-mode
@findex mh-help
@kindex ?
@kindex C-c ?
@kindex C-h C-h
@kindex C-h C-k i
@kindex C-h i
@kindex C-h m

There are many commands, but don't get intimidated. There are command
summaries at the beginning of each chapter. In case you have or would
like to rebind the keys, the command summaries also list the
associated Emacs Lisp function. Furthermore, even if you're stranded
on a desert island with a laptop and are without your manuals, you can
get a summary of all these commands with GNU Emacs online help: use
@kbd{C-h m} (@code{describe-mode}) for a brief summary of commands,
@kbd{?} (@code{mh-help}) for an even briefer summary@footnote{This
help appears in a buffer called @samp{*MH-E Help*}
(@pxref{Miscellaneous}).} (@kbd{C-c ?} in MH-Letter mode), or @kbd{C-h
i} to read this manual via Info. The online help is quite good; try
running @kbd{C-h C-h}. This brings up a list of available help topics,
one of which displays the documentation for a given key (like @kbd{C-h
k C-n}). Another useful help feature is to view the manual section
that describes a given key (such as @kbd{C-h K i}). In addition,
review @ref{Conventions}, if any of the GNU Emacs conventions are
strange to you.

In addition to all of the commands, it is also possible to reconfigure
MH-E to fit the needs of even the most demanding user. The following
chapters also describe all of the options, show the defaults, and make
recommendations for customization.

However, when customizing your mail environment, first try to change
what you want in MH, and only change MH-E if changing MH is not
possible. That way you will get the same behavior inside and outside
GNU Emacs. Note that MH-E does not provide hooks for customizations
that can be done in MH; this omission is intentional.

@cindex Emacs Lisp Manual
@cindex Emacs, Emacs Lisp Manual
@cindex Emacs, info
@cindex Emacs, online help
@cindex info
@cindex online help

I hope I've included enough examples here to get you well on your way.
If you want to explore Emacs Lisp further, a programming manual does
exist,
@c Yes, some of the stuff in the following sections is redundant, but
@c TeX barfs if the @ifs are inside the @footnote.
@iftex
@footnote{The @cite{GNU Emacs Lisp Reference Manual} may be available
online in the Info system by typing @kbd{C-h i m Emacs Lisp
@key{RET}}. It is also available online at @*
@uref{http://www.gnu.org/software/emacs/elisp-manual/html_node/}. You
can also order a printed manual, which has the desirable side-effect
of helping to support the Free Software Foundation which made all this
great software available. You can find an order form by running
@kbd{C-h C-d}, or you can request an order form from @i{gnu at
gnu.org}.}
@end iftex
@ifinfo
@footnote{@xref{Top, The GNU Emacs Lisp Reference Manual, , elisp, GNU
Emacs Lisp Reference Manual}, which may be available online in the
Info system. It is also available online at
@uref{http://www.gnu.org/software/emacs/elisp-manual/html_node/}. You
can also order a printed manual, which has the desirable side-effect
of helping to support the Free Software Foundation which made all this
great software available. You can find an order form by running
@kbd{C-h C-d}, or you can request an order form from @i{gnu at
gnu.org}.}
@end ifinfo
@ifhtml
@footnote{The
@uref{http://www.gnu.org/software/emacs/elisp-manual/html_node/,
The GNU Emacs Lisp Reference Manual} may also be available online in
the Info system by typing @kbd{C-h i m Emacs Lisp @key{RET}}. You can
also order a printed manual, which has the desirable side-effect of
helping to support the Free Software Foundation which made all this
great software available. You can find an order form by running
@kbd{C-h C-d}, or you can request an order form from @i{gnu at
gnu.org}.}
@end ifhtml
and you can look at the code itself for examples. Look in the Emacs
Lisp directory on your system (such as
@file{/usr/local/lib/emacs/lisp/mh-e}) and find all the @file{mh-*.el}
files there. When calling MH-E and other Emacs Lisp functions directly
from Emacs Lisp code, you'll need to know the correct arguments. Use
the online help for this. For example, try @kbd{C-h f
mh-execute-commands @key{RET}}. If you write your own functions,
please do not prefix your symbols (variables and functions) with
@samp{mh-}. This prefix is reserved for the MH-E package. To avoid
conflicts with existing MH-E symbols, use a prefix like @samp{my-} or
your initials. (Unless, of course, your initials happen to be @emph{mh}!)

@menu
* Options::                     
* Ranges::                      
* Folder Selection::            
@end menu

@node Options, Ranges, Using This Manual, Using This Manual
@section Options

@cindex Emacs, customizing
@cindex Emacs, setting options
@cindex customizing MH-E
@cindex setting options
@findex customize-option
@vindex mh-lpr-command-format, example

Many string or integer options are easy to modify using @kbd{M-x
customize-option}. For example, to modify the option that controls
printing, you would run @kbd{M-x customize-option @key{RET}
mh-lpr-command-format @key{RET}}. In the buffer that appears, modify
the string to the right of the variable. For example, you may change
the @command{lpr} command with @samp{nenscript -G -r -2 -i'%s'}. Then
use the @samp{State} combo box and select @samp{Save for Future
Sessions}. To read more about @code{mh-lpr-command-format}, see
@ref{Printing}.

@cindex nil
@cindex off, option
@cindex on, option
@cindex option, turning on and off
@cindex t
@findex customize-option
@vindex mh-bury-show-buffer-flag, example

Options can also hold boolean values. In Emacs Lisp, the boolean
values are @code{nil}, which means false, and @code{t}, which means
true. The @code{customize-option} function makes it easy to change
boolean values; simply click on the toggle button in the customize
buffer to switch between @samp{on} (@code{t}) and @samp{off}
(@code{nil}). For example, try setting @code{mh-bury-show-buffer-flag}
to @samp{off} to keep the MH-Show buffer at the top of the buffer
stack. Use the @samp{State} combo box and choose @samp{Set for Current
Session} to see how the option affects the show buffer. Then choose
the @samp{Erase Customization} menu item to reset the option to the
default, which places the MH-Show buffer at the bottom of the buffer
stack.

@vindex mh-mhl-format-file, example

The text usually says to turn on an option by setting it to a
@emph{non-@code{nil}} value, because sometimes values other than
@samp{on} are meaningful. An example of this is the variable
@code{mh-mhl-format-file} (@pxref{Viewing}). Other options, such as
hooks, involve a little more Emacs Lisp programming expertise.

@cindex customization group, @samp{mh}
@cindex @samp{mh} customization group
@findex customize-group
@findex mh-customize

You can browse all of the MH-E options with the @code{customize-group}
function. Try entering @kbd{M-x customize-group @key{RET} mh
@key{RET}} to view the top-level options as well as buttons for all of
the MH-E customization groups. Another way to view the MH-E
customization group is to use @kbd{M-x mh-customize @key{RET}}.

@node Ranges, Folder Selection, Options, Using This Manual
@section Ranges

@c Sync with mh-folder-mode docstring.

@cindex message abbreviations
@cindex message ranges
@cindex ranges

Many commands that operate on individual messages, such as
@code{mh-forward} or @code{mh-refile-msg} take a @code{RANGE}
argument. This argument can be used in several ways.

@kindex C-u, with ranges

If you provide the prefix argument @kbd{C-u} to these commands, then
you will be prompted for the message range. This can be any valid MH
range which can include messages, sequences (@pxref{Sequences}), and
the abbreviations (described in the @command{mh}(1) man page):

@table @samp
@item <num1>-<num2>
Indicates all messages in the range <num1> to <num2>, inclusive. The
range must be nonempty.
@c -------------------------
@item <num>:N
@itemx <num>:+N
@itemx <num>:-N
Up to N messages beginning with (or ending with) message num. Num may
be any of the predefined symbols: first, prev, cur, next or last.
@c -------------------------
@item first:N
@itemx prev:N
@itemx next:N
@itemx last:N
The first, previous, next or last messages, if they exist.
@c -------------------------
@item all
All of the messages.
@end table

For example, a range that shows all of these things is @samp{1 2 3
5-10 last:5 unseen}.

@vindex transient-mark-mode

If the option @code{transient-mark-mode} is turned on and you set a
region in the MH-Folder buffer, then the MH-E command will perform the
operation on all messages in that region.

@cindex @samp{mh-range} customization group
@cindex customization group, @samp{mh-range}

The @samp{mh-range} customization group contains a single option which
affects how ranges are interpreted.

@vtable @code
@item mh-interpret-number-as-range-flag
On means interpret a number as a range (default: @samp{on}).
@end vtable

@vindex mh-interpret-number-as-range-flag

Since one of the most frequent ranges used is @samp{last:N}, MH-E will
interpret input such as @samp{200} as @samp{last:200} if the
@code{mh-interpret-number-as-range-flag} option is on (which is the
default). If you need to scan just the message 200, then use the range
@samp{200:1} or @samp{200-200}.

@node Folder Selection,  , Ranges, Using This Manual
@section Folder Selection

@cindex completion, folders
@cindex folders, completion
@cindex folders, selecting

When you choose a folder in MH-E via a command such as @kbd{o}
(@code{mh-refile-msg}), completion is used to enter the folder
@ifnothtml
(@pxref{Completion, , , emacs, The GNU Emacs Manual}).
@end ifnothtml
@ifhtml
(see the section
@uref{http://www.gnu.org/software/emacs/manual/html_node/Completion.html,
Completion} in @cite{The GNU Emacs Manual}).
@end ifhtml
In addition, MH-E has several ways of choosing a suitable default so
that the folder can often be selected with a single @key{RET} key.

@cindex customization group, @samp{mh-folder-selection}
@cindex @samp{mh-folder-selection} customization group

The @samp{mh-folder-selection} customization group contains some
options which are used to help with this.

@vtable @code
@item mh-default-folder-for-message-function
Function to select a default folder for refiling or @samp{Fcc:}
(default: @code{nil}).
@c -------------------------
@item mh-default-folder-list
List of addresses and folders (default: @code{nil}).
@c -------------------------
@item mh-default-folder-must-exist-flag
On means guessed folder name must exist to be used (default:
@samp{on}).
@c -------------------------
@item mh-default-folder-prefix
Prefix used for folder names generated from aliases (default: @code{""}).
@end vtable

@vindex mh-default-folder-for-message-function

You can set the option @code{mh-default-folder-for-message-function}
to a function that provides a default folder for the message to be
refiled. When this function is called, the current buffer contains the
message being refiled and point is at the start of the message. This
function should return the default folder as a string with a leading
@samp{+} sign. It can also return @code{nil} so that the last folder
name is used as the default, or an empty string to suppress the
default entirely.

Otherwise, the name of the destination folder is derived from the
sender as follows:

@enumerate
@vindex mh-default-folder-list
@item
The folder name associated with the first address found in the list
@code{mh-default-folder-list} is used. Each element in this list
contains a @samp{Check Recipient} item. If this item is turned on,
then the address is checked against the recipient instead of the
sender. This is useful for mailing lists.
@c -------------------------
@vindex mh-default-folder-prefix
@item
An alias prefixed by @code{mh-default-folder-prefix} corresponding to
the address is used. The prefix is used to prevent clutter in your
mail directory. @xref{Aliases}.
@end enumerate

@vindex mh-default-folder-must-exist-flag

If the derived folder does not exist, and
@code{mh-default-folder-must-exist-flag} is @code{t}, then the last
folder name used is suggested. This is useful if you get mail from
various people for whom you have an alias, but file them all in the
same project folder.

@node Incorporating Mail, Reading Mail, Using This Manual, Top
@chapter Incorporating Your Mail

@cindex @samp{Folder} menu
@cindex incorporating
@cindex menu, @samp{Folder}

This chapter talks about getting mail from your system mailbox into
your MH @samp{+inbox} folder. The following command accomplishes that
and is found in the @samp{Folder} menu.

@table @kbd
@cindex @samp{Folder > Incorporate New Mail} menu item
@cindex menu item, @samp{Folder > Incorporate New Mail}
@findex mh-inc-folder
@kindex i
@item i
Incorporate new mail into a folder (@code{mh-inc-folder}).
@end table

@cindex @samp{mh-inc} customization group
@cindex customization group, @samp{mh-inc}

The following options in the @samp{mh-inc} customization group are
used.

@vtable @code
@item mh-inc-prog
Program to incorporate mail (default: @code{"inc"}).
@c -------------------------
@item mh-inc-spool-list
Alternate spool files (default: @code{nil}).
@end vtable

The following hook is available.

@vtable @code
@findex mh-inc-folder
@item mh-inc-folder-hook
Hook run by @code{mh-inc-folder} after incorporating mail into a
folder (default: @code{nil}).
@end vtable

@cindex @samp{+inbox}
@findex mh-inc-folder
@kindex i

If at any time you receive new mail, incorporate the new mail into
your @samp{+inbox} buffer with @kbd{i} (@code{mh-inc-folder}). Note
that @kbd{i} will display the @samp{+inbox} buffer, even if there
isn't any new mail. You can incorporate mail from any file into the
current folder by specifying a prefix argument; you'll be prompted for
the name of the file to use as well as the destination folder (for
example, @kbd{C-u i ~/mbox @key{RET} +tmp @key{RET}}).

@cindex @file{.emacs}
@cindex Emacs, notification of new mail
@cindex files, @file{.emacs}
@cindex new mail
@cindex notification of new mail

Emacs can notify you when you have new mail by displaying @samp{Mail}
in the mode line. To enable this behavior, and to have a clock in the
mode line as well, add the following to @file{~/.emacs}:

@findex display-time

@smalllisp
(display-time)
@end smalllisp

@cindex @command{inc}
@cindex incorporating
@cindex MH commands, @command{inc}
@vindex mh-inc-prog
@vindex mh-progs

The name of the program that incorporates new mail is stored in
@code{mh-inc-prog}; it is @code{"inc"} by default. This program
generates a one-line summary for each of the new messages. Unless it
is an absolute pathname, the file is assumed to be in the
@code{mh-progs} directory (@pxref{Getting Started}). You may also link
a file to @command{inc} that uses a different format (see
@samp{mh-profile}(5), and sections
@uref{@value{MH-BOOK-HOME}/reapre.html, Reading Mail: inc show next
prev} and @uref{@value{MH-BOOK-HOME}/mhstr.html, MH Format Strings} in
the MH book). You'll then need to modify several variables
appropriately (@pxref{Scan Line Formats}).

@vindex mh-inc-spool-list

You can use the @code{mh-inc-spool-list} variable to direct MH-E to
retrieve mail from arbitrary spool files other than your system
mailbox, file it in folders other than your @samp{+inbox}, and assign
key bindings to incorporate this mail.

@cindex @command{procmail}
@cindex @file{.procmailrc}
@cindex Unix commands, @command{procmail}
@cindex files, @file{.procmailrc}

Suppose you are subscribed to the @i{mh-e-devel} mailing list and you
use @command{procmail} to filter this mail into @file{~/mail/mh-e}
with the following recipe in @file{.procmailrc}:

@smallexample
MAILDIR=$HOME/mail
:0:
* ^From mh-e-devel-admin@@stop.mail-abuse.org
mh-e
@end smallexample

@findex mh-inc-spool-*
@kindex I *

In order to incorporate @file{~/mail/mh-e} into @samp{+mh-e} with an
@kbd{I m} (@code{mh-inc-spool-mh-e}) command, customize this option,
and click on the @samp{INS} button. Enter a @samp{Spool File} of
@samp{~/mail/mh-e}, a @samp{Folder} of @samp{mh-e}, and a @samp{Key
Binding} of @samp{m}.

@cindex @command{emacsclient}
@cindex @command{gnuclient}
@cindex @command{xbuffy}
@cindex @samp{gnuserv}
@cindex Unix commands, @command{emacsclient}
@cindex Unix commands, @command{gnuclient}
@cindex Unix commands, @command{xbuffy}

You can use @command{xbuffy} to automate the incorporation of this
mail using the Emacs 22 command @command{emacsclient} as follows:

@smallexample
box ~/mail/mh-e
    title mh-e
    origMode
    polltime 10
    headertime 0
    command emacsclient --eval '(mh-inc-spool-mh-e)'
@end smallexample

In XEmacs, the command @command{gnuclient} is used in a similar
fashion.

@findex mh-inc-folder
@kindex i
@vindex mh-inc-folder-hook

You can set the hook @code{mh-inc-folder-hook}, which is called after
new mail is incorporated by the @kbd{i} (@code{mh-inc-folder})
command. A good use of this hook is to rescan the whole folder either
after running @kbd{M-x mh-rmail} the first time or when you've changed
the message numbers from outside of MH-E.

@findex mh-execute-commands
@findex mh-rescan-folder, example
@findex mh-show, example
@vindex mh-inc-folder-hook, example

@smalllisp
@group
(defun my-mh-inc-folder-hook ()
  "Hook to rescan folder after incorporating mail."
  (if (buffer-modified-p)            ; @r{if outstanding refiles and deletes,}
      (mh-execute-commands))         ;   @r{carry them out}
  (mh-rescan-folder)                 ; @r{synchronize with +inbox}
  (mh-show))                         ; @r{show the current message}

(add-hook 'mh-inc-folder-hook 'my-mh-inc-folder-hook)

@i{Rescan folder after incorporating new mail via mh-inc-folder-hook}

@end group
@end smalllisp

@node Reading Mail, Folders, Incorporating Mail, Top
@chapter Reading Your Mail

@cindex @samp{+inbox}
@cindex MH-Folder mode
@cindex MH-Show mode
@cindex modes, MH-Folder
@cindex modes, MH-Show
@cindex reading mail
@findex mh-rmail
@kindex M-x mh-rmail
@kindex F r
@kindex F v

The MH-E entry point for reading mail is @kbd{M-x mh-rmail}. This
command incorporates your mail and creates a buffer called
@samp{+inbox} in MH-Folder mode. The command @kbd{M-x mh-rmail} shows
you only new mail, not mail you have already read@footnote{If you want
to see your old mail as well, use @kbd{F r} to pull all your messages
into MH-E. Or, give a prefix argument to @code{mh-rmail} so it will
prompt you for folder to visit like @kbd{F v} (for example, @kbd{C-u
M-x mh-rmail @key{RET} bob @key{RET}}). @xref{Folders}.}.

@cindex @command{scan}
@cindex @samp{Message} menu
@cindex MH commands, @command{scan}
@cindex menu, @samp{Message}
@cindex scan lines

The @samp{+inbox} buffer contains @dfn{scan lines}, which are one-line
summaries of each incorporated message. You can perform most MH
commands on these messages via one- or two-letter commands in either
the MH-Folder or MH-Show buffers or by using the @samp{Message} menu.
See @command{scan}(1) for a description of the contents of the scan
lines, and see the Figure in @ref{Reading Mail Tour}, for an example.

@table @kbd
@kindex ?
@findex mh-help
@item ?
Display cheat sheet for the MH-E commands (@code{mh-help}).
@c -------------------------
@cindex @samp{Message > Show Message} menu item
@cindex menu item, @samp{Message > Show Message}
@kindex @key{RET}
@findex mh-show
@item @key{RET}
Display message (@code{mh-show}).
@c -------------------------
@cindex @samp{Message > Show Message with Header} menu item
@cindex menu item, @samp{Message > Show Message with Header}
@kindex , (comma)
@findex mh-header-display
@item , (comma)
Display message with all header fields (@code{mh-header-display}).
@c -------------------------
@kindex ; (semicolon)
@findex mh-toggle-mh-decode-mime-flag
@item ; (semicolon)
Toggle the value of @code{mh-decode-mime-flag}
(@code{mh-toggle-mh-decode-mime-flag}).
@c -------------------------
@kindex @key{SPC}
@findex mh-page-msg
@item @key{SPC}
Display next page in message (@code{mh-page-msg}).
@c -------------------------
@kindex @key{BS}
@findex mh-previous-page
@item @key{BS}
Display previous page in message (@code{mh-previous-page}).
@c -------------------------
@cindex @samp{Message > Write Message to File...} menu item
@cindex menu item, @samp{Message > Write Message to File...}
@kindex >
@findex mh-write-msg-to-file
@item >
Append message to end of file (@code{mh-write-msg-to-file}).
@c -------------------------
@cindex @samp{Message > Pipe Message to Command...} menu item
@cindex menu item, @samp{Message > Pipe Message to Command...}
@kindex |
@findex mh-pipe-msg
@item |
Pipe message through shell command (@code{mh-pipe-msg}).
@c -------------------------
@kindex C-d
@findex mh-delete-msg-no-motion
@item C-d
Delete range, don't move to next message
(@code{mh-delete-msg-no-motion}).
@c -------------------------
@cindex @samp{Message > Delete Message} menu item
@cindex menu item, @samp{Message > Delete Message}
@kindex d
@findex mh-delete-msg
@item d
Delete range (@code{mh-delete-msg}).
@c -------------------------
@kindex D ?
@findex mh-prefix-help
@item D ?
Display cheat sheet for the commands of the current prefix in
minibuffer (@code{mh-prefix-help}).
@c -------------------------
@kindex D @key{SPC}
@findex mh-page-digest
@item D @key{SPC}
Display next message in digest (@code{mh-page-digest}).
@c -------------------------
@kindex D @key{BS}
@findex mh-page-digest-backwards
@item D @key{BS}
Display previous message in digest (@code{mh-page-digest-backwards}).
@c -------------------------
@cindex @samp{Message > Burst Digest Message} menu item
@cindex menu item, @samp{Message > Burst Digest Message}
@kindex D b
@findex mh-burst-digest
@item D b
Break up digest into separate messages (@code{mh-burst-digest}).
@c -------------------------
@cindex @samp{Message > Go to Message by Number...} menu item
@cindex menu item, @samp{Message > Go to Message by Number...}
@kindex g
@findex mh-goto-msg
@item g
Go to a message (@code{mh-goto-msg}).
@c -------------------------
@kindex k
@findex mh-delete-subject-or-thread
@item k
Delete messages with same subject or thread
(@code{mh-delete-subject-or-thread}).
@c -------------------------
@kindex K ?
@findex mh-prefix-help
@item K ?
Display cheat sheet for the commands of the current prefix in
minibuffer (@code{mh-prefix-help}).
@c -------------------------
@kindex K @key{TAB}
@findex mh-next-button
@item K @key{TAB}
Go to the next button (@code{mh-next-button}).
@c -------------------------
@kindex K S-@key{TAB}
@findex mh-prev-button
@item K S-@key{TAB}
Go to the previous button (@code{mh-prev-button}).
@c -------------------------
@kindex K a
@findex mh-mime-save-parts
@item K a
Save attachments (@code{mh-mime-save-parts}).
@c -------------------------
@kindex K e
@findex mh-display-with-external-viewer
@item K e
View attachment externally (@code{mh-display-with-external-viewer}).
@c -------------------------
@kindex K i
@findex mh-folder-inline-mime-part
@item K i
Show attachment verbatim (@code{mh-folder-inline-mime-part}).
@c -------------------------
@kindex K o
@findex mh-folder-save-mime-part
@item K o
Save (output) attachment (@code{mh-folder-save-mime-part}).
@c -------------------------
@kindex K t
@findex mh-toggle-mime-buttons
@item K t
Toggle option @code{mh-display-buttons-for-inline-parts-flag}
(@code{mh-toggle-mime-buttons}).
@c -------------------------
@kindex K v
@findex mh-folder-toggle-mime-part
@item K v
View attachment (@code{mh-folder-toggle-mime-part}).
@c -------------------------
@cindex @samp{Message > Modify Message} menu item
@cindex menu item, @samp{Message > Modify Message}
@kindex M
@findex mh-modify
@item M
Edit message (@code{mh-modify}).
@c -------------------------
@cindex @samp{Message > Go to First Message} menu item
@cindex menu item, @samp{Message > Go to First Message}
@kindex M-<
@findex mh-first-msg
@item M-<
Display first message (@code{mh-first-msg}).
@c -------------------------
@cindex @samp{Message > Go to Last Message} menu item
@cindex menu item, @samp{Message > Go to Last Message}
@kindex M->
@findex mh-last-msg
@item M->
Display last message (@code{mh-last-msg}).
@c -------------------------
@kindex M-n
@findex mh-next-unread-msg
@item M-n
Display next unread message (@code{mh-next-unread-msg}).
@c -------------------------
@kindex M-p
@findex mh-previous-unread-msg
@item M-p
Display previous unread message (@code{mh-previous-unread-msg}).
@c -------------------------
@cindex @samp{Message > Next Message} menu item
@cindex menu item, @samp{Message > Next Message}
@kindex n
@findex mh-next-undeleted-msg
@item n
Display next message (@code{mh-next-undeleted-msg}).
@c -------------------------
@cindex @samp{Message > Previous Message} menu item
@cindex menu item, @samp{Message > Previous Message}
@kindex p
@findex mh-previous-undeleted-msg
@item p
Display previous message (@code{mh-previous-undeleted-msg}).
@c -------------------------
@kindex P ?
@findex mh-prefix-help
@item P ?
Display cheat sheet for the commands of the current prefix in
minibuffer (@code{mh-prefix-help}).
@c -------------------------
@kindex P C
@findex mh-ps-print-toggle-color
@item P C
Toggle whether color is used in printing messages
(@code{mh-ps-print-toggle-color}).
@c -------------------------
@kindex P F
@findex mh-ps-print-toggle-faces
@item P F
Toggle whether printing is done with faces or not
(@code{mh-ps-print-toggle-faces}).
@c -------------------------
@kindex P f
@findex mh-ps-print-msg-file
@item P f
Print range to file (@code{mh-ps-print-msg-file}).
@c -------------------------
@cindex @samp{Message > Print Message} menu item
@cindex menu item, @samp{Message > Print Message}
@kindex P l
@findex mh-print-msg
@item P l
Print range the old fashioned way
(@code{mh-print-msg}).
@c -------------------------
@kindex P p
@findex mh-ps-print-msg
@item P p
Print range (@code{mh-ps-print-msg}).
@c -------------------------
@kindex X ?
@findex mh-prefix-help
@item X ?
Display cheat sheet for the commands of the current prefix in
minibuffer (@code{mh-prefix-help}).
@c -------------------------
@cindex @samp{Message > Unpack Uuencoded Message...} menu item
@cindex menu item, @samp{Message > Unpack Uuencoded Message...}
@kindex X s
@kindex X u
@findex mh-store-msg
@item X s
@itemx X u
Unpack message created with @command{uudecode} or @command{shar}
(@code{mh-store-msg}).
@c -------------------------
@kindex Mouse-2
@findex mh-show-mouse
@item Mouse-2
Move point to mouse event and show message (@code{mh-show-mouse}).
@end table

Within the MH-Show buffer, the following command is defined.

@table @kbd
@kindex @key{RET}
@kindex Mouse-1
@kindex Mouse-2
@findex mh-press-button
@item @key{RET}
@itemx Mouse-1
@itemx Mouse-2
View contents of button (@code{mh-press-button}).
@end table

@cindex @samp{mh-show} customization group
@cindex customization group, @samp{mh-show}

The following table lists options in the @samp{mh-show} customization
group that are used while reading mail.

@vtable @code
@item mh-bury-show-buffer-flag
On means show buffer is buried (default: @samp{on}).
@c -------------------------
@item mh-clean-message-header-flag
On means remove extraneous header fields (default: @samp{on}).
@c -------------------------
@item mh-decode-mime-flag
On means attachments are handled (default: @samp{on} if the Gnus
@samp{mm-decode} package is present).
@c -------------------------
@item mh-display-buttons-for-alternatives-flag
On means display buttons for all alternative attachments (default:
@samp{off}).
@c -------------------------
@item mh-display-buttons-for-inline-parts-flag
On means display buttons for all inline attachments (default:
@samp{off}).
@c -------------------------
@item mh-do-not-confirm-flag
On means non-reversible commands do not prompt for confirmation
(default: @samp{off}).
@c -------------------------
@item mh-fetch-x-image-url
Control fetching of @samp{X-Image-URL:} header field image (default:
@samp{Never Fetch}).
@c -------------------------
@item mh-graphical-smileys-flag
On means graphical smileys are displayed (default: @samp{on}).
@c -------------------------
@item mh-graphical-emphasis-flag
On means graphical emphasis is displayed (default: @samp{on}).
@c -------------------------
@item mh-highlight-citation-style
Style for highlighting citations (default: @samp{Multicolor}).
@c -------------------------
@item mh-invisible-header-fields-default
List of hidden header fields (default: a checklist too long to list
here).
@c -------------------------
@item mh-invisible-header-fields
Additional header fields to hide (default: @code{nil}).
@c -------------------------
@item mh-lpr-command-format
Command used to print (default: @code{"lpr -J '%s'"}).
@c -------------------------
@item mh-max-inline-image-height
Maximum inline image height if @samp{Content-Disposition:} is not
present (default: 0).
@c -------------------------
@item mh-max-inline-image-width
Maximum inline image width if @samp{Content-Disposition:} is not
present(default: 0).
@c -------------------------
@item mh-mhl-format-file
Specifies the format file to pass to the @command{mhl} program
(default: @samp{Use Default mhl Format (Printing Only)}).
@c -------------------------
@item mh-mime-save-parts-default-directory
Default directory to use for @kbd{K a}.
@c -------------------------
@item mh-print-background-flag
On means messages should be printed in the background (default:
@samp{off}).
@c -------------------------
@item mh-show-buffer-mode-line-buffer-id
Format string to produce @code{mode-line-buffer-identification} for
show buffers (default: @code{"    @{show-%s@} %d"}).
@c -------------------------
@item mh-show-maximum-size
Maximum size of message (in bytes) to display automatically (default:
0).
@c -------------------------
@item mh-show-use-xface-flag
On means display face images in MH-Show buffers (default: @samp{on}).
@c -------------------------
@item mh-store-default-directory
Default directory for @kbd{X s} (default: @samp{Current}).
@c -------------------------
@item mh-summary-height
Number of lines in MH-Folder buffer (including the mode line)
(default: depends on size of frame).
@end vtable

The following hooks are available.

@vtable @code
@item mh-delete-msg-hook
Hook run after marking each message for deletion (default: @code{nil}).
@c -------------------------
@item mh-show-hook
Hook run after @key{RET} shows a message (default: @code{nil}).
@c -------------------------
@item mh-show-mode-hook
Hook run upon entry to @code{mh-show-mode} (default: @code{nil}).
@end vtable

The following faces are available.

@vtable @code
@item mh-show-cc
Face used to highlight @samp{cc:} header fields.
@c -------------------------
@item mh-show-date
Face used to highlight @samp{Date:} header fields.
@c -------------------------
@item mh-show-from
Face used to highlight @samp{From:} header fields.
@c -------------------------
@item mh-show-header
Face used to deemphasize less interesting header fields.
@c -------------------------
@item mh-show-pgg-bad
Bad PGG signature face.
@c -------------------------
@item mh-show-pgg-good
Good PGG signature face.
@c -------------------------
@item mh-show-pgg-unknown
Unknown or untrusted PGG signature face.
@c -------------------------
@item mh-show-signature
Signature face.
@c -------------------------
@item mh-show-subject
Face used to highlight @samp{Subject:} header fields.
@c -------------------------
@item mh-show-to
Face used to highlight @samp{To:} header fields.
@c -------------------------
@item mh-show-xface
X-Face image face.
@end vtable

The functions and variables introduced here are explained in more
detail in the following sections.

@menu
* Viewing::                     
* Viewing Attachments::         
* HTML::                        
* Digests::                     
* Reading PGP::                 
* Printing::                    
* Files and Pipes::             
* Navigating::                  
* Miscellaneous Commands and Options::  
@end menu

@node Viewing, Viewing Attachments, Reading Mail, Reading Mail
@section Viewing Your Mail

@findex mh-header-display
@findex mh-page-msg
@findex mh-previous-page
@findex mh-show
@findex mh-show-mouse
@kindex , (comma)
@kindex . (period)
@kindex @key{BS}
@kindex @key{RET}
@kindex @key{SPC}
@kindex Mouse-2

The command @key{RET} (@code{mh-show}) displays the message that the
cursor is on while @kbd{Mouse-2} (@code{mh-show-mouse}) displays the
message that the mouse cursor is on. If the message is already
displayed, it scrolls to the beginning of the message. Use @key{SPC}
(@code{mh-page-msg}) and @key{BS} (@code{mh-previous-page}) to move
forwards and backwards one page at a time through the message. You can
give either of these commands a prefix argument that specifies the
number of lines to scroll (such as @kbd{10 @key{SPC}}). The @key{SPC}
command will also show the next undeleted message if it is used at the
bottom of a message. MH-E normally hides a lot of the superfluous
header fields that mailers add to a message, but if you wish to see
all of them, use the command @kbd{,} (comma;
@code{mh-header-display}).

@vindex mh-show-maximum-size

The option @code{mh-show-maximum-size} provides an opportunity to skip
over large messages which may be slow to load. The default value of 0
means that all message are shown regardless of size.

A litany of options control what displayed messages look like. 

@vindex mh-show-cc
@vindex mh-show-date
@vindex mh-show-from
@vindex mh-show-header
@vindex mh-show-subject
@vindex mh-show-to

First, the appearance of the header fields can be modified by
customizing the associated face: @code{mh-show-to}, @code{mh-show-cc},
@code{mh-show-from}, @code{mh-show-date}, and @code{mh-show-subject}.
The face @code{mh-show-header} is used to deemphasize the other, less
interesting, header fields.

@cindex regular expressions, @code{mh-invisible-header-fields}
@vindex mh-clean-message-header-flag
@vindex mh-invisible-header-fields
@vindex mh-invisible-header-fields-default

Normally messages are delivered with a handful of uninteresting header
fields. These are hidden by turning on the option
@code{mh-clean-message-header-flag} (which it is by default). The
header fields listed in the option
@code{mh-invisible-header-fields-default} are hidden, although you can
check off any field that you would like to see. Header fields that you
would like to hide that aren't listed can be added to the option
@code{mh-invisible-header-fields} with a couple of caveats. Regular
expressions are not allowed. Unique fields should have a @samp{:}
suffix; otherwise, the element can be used to render invisible an
entire class of fields that start with the same prefix. If you think a
header field should be generally ignored, report a bug (@pxref{Bug
Reports}).

@cindex header field, @samp{Face:}
@cindex header field, @samp{X-Face:}
@cindex header field, @samp{X-Image-URL:}
@cindex @samp{Face:} header field
@cindex @samp{X-Face:} header field
@cindex @samp{X-Image-URL:} header field
@vindex mh-show-use-xface-flag

MH-E can display the content of @samp{Face:}, @samp{X-Face:}, and
@samp{X-Image-URL:} header fields. If any of these fields occur in the
header of your message, the sender's face will appear in the
@samp{From:} header field. If more than one of these fields appear,
then the first field found in the order @samp{Face:}, @samp{X-Face:},
and @samp{X-Image-URL:} will be used. The option
@code{mh-show-use-xface-flag} is used to turn this feature on and off.
This feature will be turned on by default if your system supports it.

The first header field used, if present, is the Gnus-specific
@samp{Face:} field@footnote{The @samp{Face:} field appeared in GNU
Emacs 21 and XEmacs. For more information, see
@uref{http://quimby.gnus.org/circus/face/}.}.

@cindex @command{uncompface}
@cindex Emacs, packages, x-face
@cindex Unix commands, @command{uncompface}
@cindex x-face package
@vindex mh-show-xface

Next is the traditional @samp{X-Face:} header field@footnote{The
display of this field requires the
@uref{ftp://ftp.cs.indiana.edu/pub/faces/compface/compface.tar.Z,
@command{uncompface} program}. Recent versions of XEmacs have internal
support for @samp{X-Face:} images. If your version of XEmacs does not,
then you'll need both @command{uncompface} and the
@uref{ftp://ftp.jpl.org/pub/elisp/, @samp{x-face} package}.}. MH-E
renders the foreground and background of the image using the
associated attributes of the face @code{mh-show-xface}.

@cindex @command{convert}
@cindex @command{wget}
@cindex ImageMagick
@cindex Unix commands, @command{convert}
@cindex Unix commands, @command{wget}
@vindex mh-fetch-x-image-url

Finally, MH-E will display images referenced by the
@samp{X-Image-URL:} header field if neither the @samp{Face:} nor the
@samp{X-Face:} fields are present@footnote{The display of the images
requires the @uref{http://www.gnu.org/software/wget/wget.html,
@command{wget} program} to fetch the image and the @command{convert}
program from the @uref{http://www.imagemagick.org/, ImageMagick
suite}.}. Of the three header fields this is the most efficient in
terms of network usage since the image doesn't need to be transmitted
with every single mail. The option @code{mh-fetch-x-image-url}
controls the fetching of the @samp{X-Image-URL:} header field image
with the following values:

@table @samp
@item Ask Before Fetching
You are prompted before the image is fetched. MH-E will remember your
reply and will either use the already fetched image the next time the
same URL is encountered or silently skip it if you didn't fetch it the
first time. This is a good setting.
@c -------------------------
@item Never Fetch
Images are never fetched and only displayed if they are already
present in the cache. This is the default.
@end table

There isn't a value of @samp{Always Fetch} for privacy and DOS (denial
of service) reasons. For example, fetching a URL can tip off a spammer
that you've read his email (which is why you shouldn't blindly answer
yes if you've set this option to @samp{Ask Before Fetching}). Someone
may also flood your network and fill your disk drive by sending a
torrent of messages, each specifying a unique URL to a very large
file.

@cindex @file{.mhe-x-image-cache}
@cindex files, @file{.mhe-x-image-cache}

The cache of images is found in the directory
@file{.mhe-x-image-cache} within your MH directory. You can add your
own face to the @samp{From:} field too. @xref{Picture}.

@cindex @command{mhl}
@cindex MH commands, @command{mhl}
@vindex mh-mhl-format-file

Normally MH-E takes care of displaying messages itself (rather than
calling an MH program to do the work). If you'd rather have
@command{mhl} display the message (within MH-E), change the option
@code{mh-mhl-format-file} from its default value of @samp{Use Default
mhl Format (Printing Only)}. You can set this option to @samp{Use
Default mhl Format} to get the same output as you would get if you ran
@command{mhl} from the shell. If you have a format file that you want
MH-E to use, you can set this option to @samp{Specify an mhl Format
File} and enter the name of your format file (@command{mhl}(1) or
section @uref{@value{MH-BOOK-HOME}/shomes.html#Usisho, Using mhl} in
the MH book tells you how to write one). Your format file should
specify a non-zero value for @samp{overflowoffset} to allow MH-E to
parse the header. Note that @command{mhl} is always used for printing
and forwarding; in this case, the value of @code{mh-mhl-format-file}
is consulted if you have specified a format file.

@cindex citations, highlighting
@cindex highlighting citations
@vindex mh-highlight-citation-style

If the sender of the message has cited other messages in his message,
then MH-E will highlight these citations to emphasize the sender's
actual response. The option @code{mh-highlight-citation-style} can be
customized to change the highlighting style. The @samp{Multicolor}
method uses a different color for each indentation while the
@samp{Monotone} method highlights all citations in red. To disable
highlighting of citations entirely, choose @samp{None}.

@cindex URLs, highlighting
@cindex email addresses, highlighting
@cindex highlighting URLs
@cindex highlighting email addresses
@cindex links, following
@findex goto-address-at-point
@kindex C-c @key{RET}
@kindex Mouse-2
@vindex goto-address-highlight-p

Email addresses and URLs in the message are highlighted if the option
@code{goto-address-highlight-p} is on, which it is by default. To view
the web page for a highlighted URL or to send a message using a
highlighted email address, use @kbd{Mouse-2} or @kbd{C-c @key{RET}}
(@code{goto-address-at-point}). @xref{Sending Mail}, to see how to
configure Emacs to send the message using MH-E.

@cindex boldface, showing
@cindex emphasis
@cindex italics, showing
@cindex smileys
@cindex typesetting
@cindex underline, showing
@vindex gnus-emphasis-alist
@vindex mh-decode-mime-flag
@vindex mh-graphical-emphasis-flag
@vindex mh-graphical-smileys-flag

It is a long standing custom to inject body language using a
cornucopia of punctuation, also known as the @dfn{smileys}. MH-E can
render these as graphical widgets if the option
@code{mh-graphical-smileys-flag} is turned on, which it is by default.
Smileys include patterns such as :-) and ;-). Similarly, a few
typesetting features are indicated in ASCII text with certain
characters. If your terminal supports it, MH-E can render these
typesetting directives naturally if the option
@code{mh-graphical-emphasis-flag} is turned on, which it is by
default. For example, _underline_ will be
@ifhtml
@html
<u>underlined</u>,
@end html
@end ifhtml
@ifnothtml
underlined,
@end ifnothtml
*bold* will appear in @b{bold}, /italics/ will appear in @i{italics},
and so on. See the option @code{gnus-emphasis-alist} for the whole
list. Both of these options are disabled if the option
@code{mh-decode-mime-flag} is turned off. @xref{Viewing Attachments}.

@cindex signature separator
@cindex vCard
@vindex mh-show-signature

MH-E normally renders signatures and vCards in italics so that the
body of the message stands out more. MH-E depends on the presence of
the @dfn{signature separator} (@code{"-- "}) to do this. You can also
customize the face @code{mh-show-signature} so the appearance of the
signature block is more to your liking.

@vindex mh-show-hook
@vindex mh-show-mode-hook

Two hooks can be used to control how messages are displayed. The first
hook, @code{mh-show-mode-hook}, is called early on in the process of
the message display. It is usually used to perform some action on the
message's content. The second hook, @code{mh-show-hook}, is the last
thing called after messages are displayed. It's used to affect the
behavior of MH-E in general or when @code{mh-show-mode-hook} is too
early.

@cindex MH-Show mode
@cindex modes, MH-Show
@vindex mh-show-buffer-mode-line-buffer-id

For those who like to modify their mode lines, use
@code{mh-show-buffer-mode-line-buffer-id} to modify the mode line in
the MH-Show buffers. Place the two escape strings @samp{%s} and
@samp{%d}, which will display the folder name and the message number,
respectively, somewhere in the string in that order. The default value
of @code{"@{show-%s@} %d"} yields a mode line of

@smallexample
-----@{show-+inbox@} 4      (MH-Show)--Bot--------------------------------
@end smallexample

@node Viewing Attachments, HTML, Viewing, Reading Mail
@section Viewing Attachments

@cindex attachments
@cindex body parts
@cindex @command{mhshow}
@cindex @command{show}
@cindex MH commands, @command{mhshow}
@cindex MH commands, @command{show}
@cindex MIME
@cindex multimedia mail

MH has the ability to display @dfn{@sc{mime}} (Multipurpose Internet
Mail Extensions) messages which are simply messages with additional
@dfn{body parts} or @dfn{attachments}. You can use the MH commands
@command{show}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/reapre.html, Reading Mail: inc show next
prev} in the MH book.} or @command{mhshow}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/usimim.html#ReMIMa, Reading MIME Mail} in
the MH book.} from the shell to read @sc{mime} messages@footnote{You
can call them directly from Emacs if you're running the X Window
System: type @kbd{M-! xterm -e mhshow @var{message-number}}. You can
leave out the @samp{xterm -e} if you use @command{mhlist} or
@command{mhstore}.}.

@cindex Emacs, packages, mm-decode
@cindex mm-decode package
@findex mh-toggle-mh-decode-mime-flag
@kindex ; (semicolon)
@vindex mh-decode-mime-flag

MH-E can handle attachments as well if the Gnus @samp{mm-decode}
package is present. If so, the option @code{mh-decode-mime-flag} will
be on. Otherwise, you'll see the @sc{mime} body parts rather than text
or attachments. There isn't much point in turning off the option
@code{mh-decode-mime-flag}; however, you can inspect it if it appears
that the body parts are not being interpreted correctly or toggle it
with the command @kbd{;} (semicolon;
@code{mh-toggle-mh-decode-mime-flag}) to view the raw message. This
option also controls the display of quoted-printable messages and
other graphical widgets. @xref{Viewing}.

@cindex buttons

Attachments in MH-E are indicated by @dfn{buttons} like this:

@smallexample
[1. image/jpeg; foo.jpg]...
@end smallexample

@findex mh-next-button
@findex mh-press-button
@findex mh-prev-button
@kindex @key{RET}
@kindex K @key{TAB}
@kindex K S-@key{TAB}
@kindex Mouse-1
@kindex Mouse-2

To view the contents of the button, use either @kbd{Mouse-1} or
@kbd{Mouse-2} on the button or @key{RET} (@code{mh-press-button}) when
the cursor is over the button. This command is a toggle so if you use
it again on the same attachment, it is hidden. If Emacs does not know
how to display the attachment, then Emacs offers to save the
attachment in a file. To move the cursor to the next button, use the
command @kbd{K @key{TAB}} (@code{mh-next-button}). If the end of the
buffer is reached then the search wraps over to the start of the
buffer. To move the cursor to the previous button, use the command
@kbd{K S-@key{TAB}} (@code{mh-prev-button}). If the beginning of the
buffer is reached then the search wraps over to the end of the buffer.

@cindex attachments, viewing
@cindex viewing attachments
@findex mh-folder-toggle-mime-part
@kindex K v

Another way to view the contents of a button is to use the command
@kbd{K v} (@code{mh-folder-toggle-mime-part}). This command displays
(or hides) the attachment associated with the button under the cursor.
If the cursor is not located over a button, then the cursor first
moves to the next button, wrapping to the beginning of the message if
necessary. This command has the advantage over the previous commands
of working from the MH-Folder buffer. You can also provide a numeric
prefix argument (as in @kbd{4 K v}) to view the attachment labeled
with that number. If Emacs does not know how to display the
attachment, then Emacs offers to save the attachment in a file.

@cindex @file{/etc/mailcap}
@cindex files, @file{/etc/mailcap}
@findex mailcap-mime-info
@findex mh-display-with-external-viewer
@kindex K e

If Emacs does not know how to view an attachment, you could save it
into a file and then run some program to open it. It is easier,
however, to launch the program directly from MH-E with the command
@kbd{K e} (@code{mh-display-with-external-viewer}). While you'll most
likely use this to view spreadsheets and documents, it is also useful
to use your browser to view HTML attachments with higher fidelity than
what Emacs can provide. This command displays the attachment
associated with the button under the cursor. If the cursor is not
located over a button, then the cursor first moves to the next button,
wrapping to the beginning of the message if necessary. You can provide
a numeric prefix argument (as in @kbd{4 K e}) to view the attachment
labeled with that number. This command tries to provide a reasonable
default for the viewer by calling the Emacs function
@code{mailcap-mime-info}. This function usually reads the file
@file{/etc/mailcap}.

@cindex attachments, saving
@cindex saving attachments
@findex mh-folder-save-mime-part
@kindex K o

Use the command @kbd{K o} (@code{mh-folder-save-mime-part}) to save
attachments (the mnemonic is ``output''). This command saves the
attachment associated with the button under the cursor. If the cursor
is not located over a button, then the cursor first moves to the next
button, wrapping to the beginning of the message if necessary. You can
also provide a numeric prefix argument (as in @kbd{3 K o}) to save the
attachment labeled with that number. This command prompts you for a
filename and suggests a specific name if it is available.

@cindex @command{mhn}
@cindex @command{mhstore}
@cindex MH commands, @command{mhn}
@cindex MH commands, @command{mhstore}
@findex mh-mime-save-parts
@kindex K a
@vindex mh-mime-save-parts-default-directory

You can save all of the attachments at once with the command @kbd{K a}
(@code{mh-mime-save-parts}). The attachments are saved in the
directory specified by the option
@code{mh-mime-save-parts-default-directory} unless you use a prefix
argument (as in @kbd{C-u K a}) in which case you are prompted for the
directory. These directories may be superseded by MH profile
components, since this function calls on @command{mhstore}
(@command{mhn}) to do the work.

@vindex mh-mime-save-parts-default-directory

The default value for the option
@code{mh-mime-save-parts-default-directory} is @samp{Prompt Always} so
that you are always prompted for the directory in which to save the
attachments. However, if you usually use the same directory within a
session, then you can set this option to @samp{Prompt the First Time}
to avoid the prompt each time. you can make this directory permanent
by choosing @samp{Directory} and entering the directory's name.

@cindex attachments, inline
@cindex inline attachments
@findex mh-toggle-mime-buttons
@kindex K t
@vindex mh-display-buttons-for-inline-parts-flag

The sender can request that attachments should be viewed inline so
that they do not really appear like an attachment at all to the
reader. Most of the time, this is desirable, so by default MH-E
suppresses the buttons for inline attachments. On the other hand, you
may receive code or HTML which the sender has added to his message as
inline attachments so that you can read them in MH-E. In this case, it
is useful to see the buttons so that you know you don't have to cut
and paste the code into a file; you can simply save the attachment. If
you want to make the buttons visible for inline attachments, you can
use the command @kbd{K t} (@code{mh-toggle-mime-buttons}) to toggle
the visibility of these buttons. You can turn on these buttons
permanently by turning on the option
@code{mh-display-buttons-for-inline-parts-flag}.

MH-E cannot display all attachments inline however. It can display
text (including @sc{html}) and images.

@cindex header field, @samp{Content-Disposition:}
@cindex inline images
@cindex @samp{Content-Disposition:} header field
@vindex mh-max-inline-image-height
@vindex mh-max-inline-image-width

Some older mail programs do not insert the needed
plumbing@footnote{This plumbing is the @samp{Content-Disposition:}
header field.} to tell MH-E whether to display the attachments inline
or not. If this is the case, MH-E will display these images inline if
they are smaller than the window. However, you might want to allow
larger images to be displayed inline. To do this, you can change the
options @code{mh-max-inline-image-width} and
@code{mh-max-inline-image-height} from their default value of zero to
a large number. The size of your screen is a good choice for these
numbers.

@cindex alternatives
@cindex attachments, alternatives
@vindex mh-display-buttons-for-alternatives-flag

Sometimes, a mail program will produce multiple alternatives of an
attachment in increasing degree of faithfulness to the original
content. By default, only the preferred alternative is displayed. If
the option @code{mh-display-buttons-for-alternatives-flag} is on, then
the preferred part is shown inline and buttons are shown for each of
the other alternatives.

@kindex K i
@findex mh-folder-inline-mime-part

You can view the raw contents of an attachment with the command @kbd{K
i} (@code{mh-folder-inline-mime-part}). This command displays (or
hides) the contents of the attachment associated with the button under
the cursor verbatim. If the cursor is not located over a button, then
the cursor first moves to the next button, wrapping to the beginning
of the message if necessary. You can also provide a numeric prefix
argument (as in @kbd{4 K i}) to view the attachment labeled with that
number.

For additional information on buttons, see
@ifinfo
@ref{Article Buttons,,,gnus}, and @ref{MIME Commands,,,gnus}.
@end ifinfo
@ifnotinfo
the chapters @uref{http://www.gnus.org/manual/gnus_101.html#SEC101,
Article Buttons} and
@uref{http://www.gnus.org/manual/gnus_108.html#SEC108, MIME Commands}
in the @cite{The Gnus Manual}.
@end ifnotinfo

@node HTML, Digests, Viewing Attachments, Reading Mail
@section HTML

@cindex HTML
@cindex Gnus

MH-E can display messages that have been sent in HTML@footnote{This
feature depends on a version of Gnus that is at least 5.10.}. The
content of the message will appear in the MH-Show buffer as you would
expect if the entire message is HTML, or there is an inline HTML body
part. However, if there is an HTML body part that is an attachment,
then you'll see a button like this:

@smallexample
[1. text/html; foo.html]...
@end smallexample

To see how to read the contents of this body part, see @ref{Viewing
Attachments}.

@vindex mm-text-html-renderer

The browser that MH-E uses is determined by the option
@code{mm-text-html-renderer}. The default setting is set automatically
based upon the presence of a known browser on your system. If you wish
to use a different browser, then set this option accordingly. See the
documentation for the browser you use for additional information on
how to use it. In particular, find and disable the option to render
images as this can tip off spammers that the email address they have
used is valid.

@vindex mm-text-html-renderer

If you're confused about which @code{mm-text-html-renderer} to use,
here's a brief description of each, sorted by popularity, that
includes the results of a quick poll of MH-E users from 2005-12-23.

@table @asis
@cindex browser, @samp{w3m}
@cindex @samp{w3m}
@kindex Mouse-2
@kindex S-Mouse-2
@item @samp{w3m} 7
The @samp{w3m} browser requires an external program. It's quick,
produces pretty nice output, and best of all, it's the only browser
that highlights links. These can be clicked with @kbd{Mouse-2} to view
the content of the link in @samp{w3m} or with @kbd{S-Mouse-2} to view
the content of the link in an external browser. The @samp{w3m} browser
handles tables well and actually respects the table's width parameter
(which can cause text to wrap if the author didn't anticipate that the
page would be viewed in Emacs).
@c -------------------------
@cindex browser, @samp{w3m-standalone}
@cindex @samp{w3m-standalone}
@item @samp{w3m-standalone} 3
This browser, along with @samp{nil} for the external browser, are the
only choices that work without having to download a separate lisp
package or external program. This browser is quick, but does not show
links. It handles simple tables but some tables get rendered much
wider than the Emacs frame. This browser was the only one not to
handle the escape @samp{&ndash;} (it printed a @samp{?}), but it did
render @samp{&reg;}.
@c -------------------------
@cindex browser, @samp{links}
@cindex @samp{links}
@item @samp{links} 1
The @samp{links} browser requires an external program. It's quick, and
produces nicer output than @samp{lynx} on single column mails in
tables. However, it doesn't show links and it doesn't do as nice a job
on multi-column tables as some lines wrap. At least it fits in 80
columns and thus seems better than @samp{w3} and
@samp{w3m-standalone}. Converts escapes such as @samp{&reg;} to (R).
@c -------------------------
@cindex browser, @samp{lynx}
@cindex @samp{lynx}
@item @samp{lynx} 1
The @samp{lynx} browser requires an external program. It's quick and
produces pretty decent output but it doesn't show links. It doesn't
seem to do multi-column tables which makes output much cleaner. It
centers the output and wraps long lines more than most. Handles
@samp{&reg;}.
@c -------------------------
@item @samp{nil} 1
This choice obviously requires an external browser. Like
@samp{w3m-standalone}, it works out of the box. With this setting,
HTML messages have a button for the body part which you can view with
@kbd{K v} (@code{mh-folder-toggle-mime-part}).
@c -------------------------
@cindex browser, @samp{w3}
@cindex @samp{w3}
@item @samp{w3} 0
This choice does not require an external program as all of the
rendering is done in lisp. You do need to get the package separately.
This browser is @strong{slow}, and doesn't appear to have been updated
since 2001 and the author hasn't responded to my emails. It displays
unknown tags instead of hiding them, so you get to see all the
Microsoft crap in certain messages. Tends to make multi-column tables
wider than even a full-screen Emacs can handle. Like @samp{w3m}, you
can follow links, but you have to find them first as they are not
highlighted. Performs well on single-column tables and handles escapes
such as @samp{&reg;}.
@c -------------------------
@cindex browser, @samp{html2text}
@cindex @samp{html2text}
@item @samp{html2text} 0
The @samp{html2text} browser requires an external program. I noticed
that it can do some nasty things with simple HTML mails (like filling
the entire message as if it were one paragraph, including signature).
On another message, it displayed half of the HTML tags for some
reason.
@end table

@vindex mm-text-html-renderer

For a couple more sources of information about
@code{mm-text-html-renderer},
@ifinfo
@xref{Display Customization,,,emacs-mime}, and the documentation for
the Gnus command @kbd{W h} (@pxref{Article Washing,,,gnus},).
@end ifinfo
@ifnotinfo
see section @uref{http://www.gnus.org/manual/emacs-mime_6.html,
Display Customization} in the @cite{The Emacs MIME Manual} and the the
documentation for the Gnus command @kbd{W h} (see section
@uref{http://www.gnus.org/manual/gnus_99.html, Article Washing} in the
@cite{The Gnus Manual}).
@end ifnotinfo

@node Digests, Reading PGP, HTML, Reading Mail
@section Digests

@cindex digests
@findex mh-page-digest
@findex mh-page-digest-backwards
@kindex D @key{BS}
@kindex D @key{SPC}
@kindex @key{BS}
@kindex @key{SPC}

A digest is a message that contains other messages. Special MH-E
commands let you read digests conveniently. You can use @key{SPC} and
@key{BS} to page through the digest as if it were a normal message,
but if you wish to skip to the next message in the digest, use
@kbd{D @key{SPC}} (@code{mh-page-digest}). To return to a previous message,
use @kbd{D @key{BS}} (@code{mh-page-digest-backwards}).

@cindex @command{burst}
@cindex MH commands, @command{burst}
@cindex MH-Folder Show mode
@cindex modes, MH-Folder Show
@findex mh-burst-digest
@kindex d
@kindex D b
@kindex t

Another handy command is @kbd{D b} (@code{mh-burst-digest}). This
command uses the MH command @command{burst}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/burdig.html, Bursting Messages} in the MH
book.} to break out each message in the digest into its own message.
Using this command, you can quickly delete unwanted messages, like
this: Once the digest is split up, toggle out of MH-Folder Show mode
with @kbd{t} (@pxref{Folders}) so that the scan lines fill the screen
and messages aren't displayed. Then use @kbd{d} (@pxref{Reading Mail})
to quickly delete messages that you don't want to read (based on the
@samp{Subject:} header field). You can also burst the digest to reply
directly to the people who posted the messages in the digest. One
problem you may encounter is that the @samp{From:} header fields are
preceded with a @samp{>} so that your reply can't create the
@samp{To:} field correctly. In this case, you must correct the
@samp{To:} field yourself. This is described later (@pxref{Editing
Drafts}).

@node Reading PGP, Printing, Digests, Reading Mail
@section Signed and Encrypted Messages

@cindex GPG
@cindex GnuPG
@cindex Gnus
@cindex OpenPGP
@cindex PGP
@cindex RFC 3156
@cindex encrypted messages
@cindex security
@cindex signed messages

You can read encrypted or signed PGP or GPG messages with
MH-E@footnote{This feature depends on post-5.10 versions of Gnus.
@cite{MIME Security with OpenPGP} is documented in
@uref{http://www.rfc-editor.org/rfc/rfc3156.txt, RFC 3156}. However,
MH-E can also decrypt old-style PGP messages that are not in MIME
format.}. This section assumes that you already have a good
understanding of GPG and have set up your keys appropriately.

If someone sends you a signed message, here is what you'll see:

@smallexample
@group
[[PGP Signed Part:Bill Wohler <wohler@@stop.mail-abuse.org>]]
This is a signed message.

[[End of PGP Signed Part]]
@end group
@end smallexample

@cindex keychain
@cindex key server
@cindex signed messages

If the key for the given signature is not in your keychain, you'll be
given the opportunity to fetch the key from a key server and verify
the key. If the message is really large, the verification process can
take a long time. You can press @kbd{C-g} at any time to
cancel@footnote{Unfortunately in the current version, the validation
process doesn't display a message so it appears that MH-E has hung. We
hope that this will be fixed in the future.}.

If the signature doesn't check out, you might see something like this:

@smallexample
@group
[[PGP Signed Part:Failed]]
This is a signed message.
This is garbage added after the signature was made.

[[End of PGP Signed Part]]
@end group
@end smallexample

@cindex decrypting messages

If someone sends you an encrypted message, MH-E will ask for your
passphrase to decrypt the message. You should see something like this:

@smallexample
@group
[[PGP Encrypted Part:OK]]

[[PGP Signed Part:Bill Wohler <wohler@@stop.mail-abuse.org>]]
This is the secret message.

[[End of PGP Signed Part]]

[[End of PGP Encrypted Part]]
@end group
@end smallexample

If there is a problem decrypting the message, the button will say:

@smallexample
[[PGP Encrypted Part:Failed]]
@end smallexample

You can read the contents of this button using the methods described in
@ref{Viewing Attachments}. If the message were corrupted, you'd see
this:

@smallexample
[[PGP Encrypted Part:Failed]
Invalid base64 data]
@end smallexample

If your passphrase were incorrect, you'd see something like this:

@smallexample
[GNUPG:] ENC_TO CD9C88BB610BD9AD 1 0
[GNUPG:] USERID_HINT CD9C88BB610BD9AD Bill Wohler <wohler@@stop.mail-abuse.org>
[GNUPG:] NEED_PASSPHRASE CD9C88BB610BD9AD CD9C88BB610BD9AD 1 0
[GNUPG:] BAD_PASSPHRASE CD9C88BB610BD9AD
gpg: encrypted with 1024-bit RSA key, ID 610BD9AD, created 1997-09-09
      "Bill Wohler <wohler@@stop.mail-abuse.org>"
gpg: public key decryption failed: bad passphrase
[GNUPG:] BEGIN_DECRYPTION
[GNUPG:] DECRYPTION_FAILED
gpg: decryption failed: secret key not available
[GNUPG:] END_DECRYPTION

gpg exited abnormally: '2'
@end smallexample

@vindex mh-show-pgg-bad
@vindex mh-show-pgg-good
@vindex mh-show-pgg-unknown

The appearance of the buttons is controlled by the faces
@code{mh-show-pgg-good}, @code{mh-show-pgg-bad}, and
@code{mh-show-pgg-unknown} depending on the validity of the signature.
The latter is used whether the signature is unknown or untrusted.

@cindex @samp{pgg} customization group
@cindex PGG
@cindex customization group, @samp{pgg}

The @samp{pgg} customization group may have some settings which may
interest you. 
@iftex
See @cite{The PGG Manual}.
@end iftex
@ifinfo
@xref{Top, , The PGG Manual, pgg, The PGG Manual}.
@end ifinfo
@ifhtml
See
@uref{http://www.dk.xemacs.org/Documentation/packages/html/pgg.html,
@cite{The PGG Manual}}.
@end ifhtml

@node Printing, Files and Pipes, Reading PGP, Reading Mail
@section Printing Your Mail

@cindex printing
@findex mh-ps-print-msg
@findex mh-ps-print-msg-file
@kindex P f
@kindex P p
@vindex mh-lpr-command-format
@vindex mh-print-background-flag

To print messages in MH-E, use the command @kbd{P p}
(@code{mh-ps-print-msg}). You can print all the messages in a range
(as in @kbd{C-u P p 1 3 5-7 last:5 frombob @key{RET}},
@pxref{Ranges}). You can also send the output to a file with @kbd{P f}
(@code{mh-ps-print-msg-file}). This command will print inline text
attachments but will not decrypt messages. However, when a message is
displayed in an MH-Show buffer, then that buffer is used verbatim for
printing with the caveat that only text attachments, if opened inline,
are printed. Therefore, encrypted messages can be printed by showing
and decrypting them first. The commands @kbd{P p} and @kbd{P f} do not
use the options @code{mh-lpr-command-format} or
@code{mh-print-background-flag}, described below.

@findex mh-ps-print-toggle-color
@kindex P C
@vindex ps-print-color-p

Colors are emulated on black-and-white printers with shades of gray.
This might produce illegible output, even if your screen colors only
use shades of gray. If this is the case, try using the command @kbd{P
C} (@code{mh-ps-print-toggle-color}) to toggle between color, no
color, and a black and white representation of the colors and see
which works best. You change this setting permanently by customizing
the option @code{ps-print-color-p}.

@findex mh-ps-print-toggle-faces
@kindex P F

Another related function is the command @kbd{P F}
(@code{mh-ps-print-toggle-faces}). This command toggles between using
faces and not. When faces are enabled, the printed message will look
very similar to the message in the MH-Show buffer.

@cindex ps-print package
@cindex Emacs, packages, ps-print

MH-E uses the @samp{ps-print} package to do the printing, so you can
customize the printing further by going to the @samp{ps-print}
customization group.

@cindex @command{lpr}
@cindex @command{mhl}
@cindex MH commands, @command{mhl}
@cindex Unix commands, @command{lpr}
@findex mh-print-msg
@kindex P l

An alternative to using the @samp{ps-print} package is the command
@kbd{P l} (@code{mh-print-msg}) (the @i{l} is for @i{l}ine printer or
@i{l}pr). You can print all the messages in a range. The message is
formatted with @command{mhl}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/shomes.html#Usisho, Using mhl} in the MH
book.} and printed with the @command{lpr} command.

@kindex P f
@kindex P l
@kindex P p
@vindex mh-lpr-command-format
@vindex mh-print-background-flag

The command @kbd{P l} uses two options. The option
@code{mh-lpr-command-format} contains the Unix command line which
performs the actual printing. The string can contain one escape,
@samp{%s}, which is replaced by the name of the folder and the message
number and is useful for print job names. The default setting is
@code{"lpr -J '%s'"}. I use @code{"mpage -h'%s' -b Letter -H1of -mlrtb
-P"} which produces a nice header and adds a bit of margin so the text
fits within my printer's margins. Normally messages are printed in the
foreground. If this is slow on your system, you may elect to turn on
the option @code{mh-print-background-flag} to print in the background.
If you do this, do not delete the message until it is printed or else
the output may be truncated. These options are not used by the
commands @kbd{P p} or @kbd{P f}.

@node Files and Pipes, Navigating, Printing, Reading Mail
@section Files and Pipes

@cindex files
@cindex pipes
@findex mh-refile-or-write-again
@findex mh-write-msg-to-file
@kindex >
@kindex !

MH-E does offer a couple of commands that are not a part of MH@. The
first one, @kbd{>} (@code{mh-write-msg-to-file}), writes a message to
a file. You are prompted for the filename. If the file already exists,
the message is appended to it. You can also write the message to the
file without the header by specifying a prefix argument (such as
@kbd{C-u > /tmp/foobar @key{RET}}). Subsequent writes to the same file
can be made with the command @kbd{!}
(@code{mh-refile-or-write-again}).

@findex mh-pipe-msg
@kindex |
@kindex l

You can also pipe the message through a Unix shell command with the
command @kbd{|} (@code{mh-pipe-msg}). You are prompted for the Unix
command through which you wish to run your message. If you give a
prefix argument to this command, the message header is included in the
text passed to the command (the contrived example @kbd{C-u | lpr}
would be done with the @kbd{l} command instead).

@cindex @command{shar}
@cindex @command{uuencode}
@cindex Unix commands, @command{shar}
@cindex Unix commands, @command{uuencode}
@findex mh-store-msg
@kindex X s
@vindex mh-store-default-directory

If the message is a shell archive @command{shar} or has been run
through @command{uuencode} use @kbd{X s} (@code{mh-store-msg}) to
extract the body of the message. The default directory for extraction
is the current directory; however, you have a chance to specify a
different extraction directory. The next time you use this command,
the default directory is the last directory you used. If you would
like to change the initial default directory, customize the option
@code{mh-store-default-directory}, change the value from
@samp{Current} to @samp{Directory}, and then enter the name of the
directory for storing the content of these messages.

@findex mh-store-buffer
@kindex @key{RET}
@kindex X s

By the way, @kbd{X s} calls the Emacs Lisp function
@code{mh-store-buffer}. I mention this because you can use it directly
if you're editing a buffer that contains a file that has been run
through @command{uuencode} or @command{shar}. For example, you can
extract the contents of the current buffer in your home directory by
typing @kbd{M-x mh-store-buffer @key{RET} ~ @key{RET}}.

@node Navigating, Miscellaneous Commands and Options, Files and Pipes, Reading Mail
@section Navigating

@cindex moving between messages
@cindex navigation
@findex mh-first-msg
@findex mh-goto-msg
@findex mh-last-msg
@findex mh-next-undeleted-msg
@findex mh-next-unread-msg
@findex mh-previous-undeleted-msg
@findex mh-previous-unread-msg
@kindex g
@kindex M-<
@kindex M->
@kindex M-n
@kindex M-p
@kindex n
@kindex p

To move on to the next message, use the command @kbd{n}
(@code{mh-next-undeleted-msg}); use @kbd{p}
(@code{mh-previous-undeleted-msg}) to read the previous message. To
move to the next unread message, use @kbd{M-n}
(@code{mh-next-unread-msg}); use @kbd{M-p}
(@code{mh-previous-unread-msg}) to move to the previous unread
message. These commands can be given a prefix argument to specify how
many messages to skip (for example, @kbd{5 n}). You can also move to a
specific message with @kbd{g} (@code{mh-goto-msg}). You can enter the
message number either before or after typing @kbd{g}. In the latter
case, Emacs prompts you. Finally, you can go to the first or last
message with @kbd{M-<} (@code{mh-first-msg}) and @kbd{M->}
(@code{mh-last-msg}) respectively.

@cindex MH-Folder mode
@cindex modes, MH-Folder
@findex next-line
@findex previous-line
@kindex C-n
@kindex C-p
@kindex @key{RET}

You can also use the Emacs commands @kbd{C-p} (@code{previous-line})
and @kbd{C-n} (@code{next-line}) to move up and down the scan lines in
the MH-Folder window. These commands can be used in conjunction with
@key{RET} to look at deleted or refiled messages.

@cindex deleting messages
@findex mh-delete-msg
@kindex d
@kindex n
@kindex p

To mark a message for deletion, use the command @kbd{d}
(@code{mh-delete-msg}). A @samp{D} is placed by the message in the
scan window, and the next undeleted message is displayed. If the
previous command had been @kbd{p}, then the next message displayed is
the first undeleted message previous to the message just deleted. Use
@kbd{n} to force subsequent @kbd{d} commands to move forward to the
next undeleted message after deleting the message under the cursor.
You may also specify a range (for example, @kbd{C-u d 1 3 5-7 last:5
frombob @key{RET}}, @pxref{Ranges}).

@findex mh-delete-msg-no-motion
@kindex C-d

The command @kbd{C-d} (@code{mh-delete-msg-no-motion}) marks the
message (or messages in range) for deletion but leaves the cursor at
the current message in case you wish to perform other operations on
the message.

@findex mh-delete-subject
@findex mh-delete-subject-or-thread
@findex mh-thread-delete
@findex mh-undo
@kindex k
@kindex T d
@kindex u

And to delete more messages faster, you can use @kbd{k}
(@code{mh-delete-subject-or-thread}) to delete all the messages with
the same subject as the current message. This command puts these
messages in a sequence named @samp{subject}. You can undo this action
by using @kbd{u} (@code{mh-undo}) with a prefix argument and then
specifying the @samp{subject} sequence. However, if the buffer is
displaying a threaded view of the folder then @kbd{k} behaves like
@kbd{T d} (@code{mh-thread-delete}). @xref{Threading}.

@findex mh-execute-commands
@kindex x

However you mark a message for deletion, the command @kbd{x}
(@code{mh-execute-commands}) actually carries out the deletion
(@pxref{Folders}).

@vindex mh-delete-msg-hook

The hook @code{mh-delete-msg-hook} is called after you mark a message
for deletion. For example, a past maintainer of MH-E used this once
when he kept statistics on his mail usage.

@node Miscellaneous Commands and Options,  , Navigating, Reading Mail
@section Miscellaneous Commands and Options

This section contains a few more miscellaneous commands and options.

@cindex editing message
@findex mh-modify
@kindex M

There are times when you need to edit a message. For example, you may
need to fix a broken Content-Type header field. You can do this with
the command @kbd{M} (@code{mh-modify}). It displays the raw message in
an editable buffer. When you are done editing, save and kill the
buffer as you would any other.

@findex mh-kill-folder
@findex mh-pack-folder
@vindex mh-do-not-confirm-flag

Commands such as @code{mh-pack-folder} prompt to confirm whether to
process outstanding moves and deletes or not before continuing.
Turning on the option @code{mh-do-not-confirm-flag} means that these
actions will be performed---which is usually desired but cannot be
retracted---without question@footnote{In previous versions of MH-E,
this option suppressed the confirmation in @code{mh-kill-folder}.
Since this kept most users from setting this option,
@code{mh-kill-folder} was modified in version 6.0 to always ask for
confirmation subject to @code{mh-kill-folder-suppress-prompt-hook}.
@xref{Folders}.}.

@cindex MH-Folder mode
@cindex modes, MH-Folder
@vindex mh-summary-height

The option @code{mh-summary-height} controls the number of scan lines
displayed in the MH-Folder window, including the mode line. The
default value of this option is @samp{Automatic} which means that the
MH-Folder buffer will maintain the same proportional size if the frame
is resized. If you'd prefer a fixed height, then choose the
@samp{Fixed Size} option and enter the number of lines you'd like to
see.

@vindex mh-bury-show-buffer-flag

Normally the buffer for displaying messages is buried at the bottom at
the buffer stack. You may wish to disable this feature by turning off
the option @code{mh-bury-show-buffer-flag}. One advantage of not
burying the show buffer is that one can delete the show buffer more
easily in an electric buffer list because of its proximity to its
associated MH-Folder buffer. Try running @kbd{M-x
electric-buffer-list} to see what I mean.

@cindex @file{.emacs}
@cindex files, @file{.emacs}
@cindex reading mail

Before we leave this section, I'll include a function that I use as a
front end to MH-E@footnote{Stephen Gildea's favorite binding is
@kbd{(global-set-key "\C-cr" 'mh-rmail)}.}. It toggles between your
working window configuration, which may be quite involved---windows
filled with source, compilation output, man pages, and other
documentation---and your MH-E window configuration. Like the rest of
the customization described in this section, simply add the following
code to @file{~/.emacs}.

@iftex
@filbreak
@end iftex

@findex mh-rmail, example

@smalllisp
@group
(defvar my-mh-screen-saved nil
  "Set to non-@code{nil} when MH-E window configuration shown.")
(defvar my-normal-screen nil "Normal window configuration.")
(defvar my-mh-screen nil "MH-E window configuration.")

(defun my-mh-rmail (&optional arg)
  "Toggle between MH-E and normal screen configurations.
With non-@code{nil} or prefix argument, @i{inc} mailbox as well
when going into mail."
  (interactive "P")                 ; @r{user callable function, P=prefix arg}
  (setq my-mh-screen-saved          ; @r{save state}
        (cond
         ;; @r{Bring up MH-E screen if arg or normal window configuration.}
         ;; @r{If arg or +inbox buffer doesn't exist, run mh-rmail.}
         ((or arg (null my-mh-screen-saved))
          (setq my-normal-screen (current-window-configuration))
          (if (or arg (null (get-buffer "+inbox")))
              (mh-rmail)
            (set-window-configuration my-mh-screen))
          t)                        ; @r{set my-mh-screen-saved to @code{t}}
         ;; @r{Otherwise, save MH-E screen and restore normal screen.}
         (t
          (setq my-mh-screen (current-window-configuration))
          (set-window-configuration my-normal-screen)
          nil))))                   ; @r{set my-mh-screen-saved to nil}

(global-set-key "\C-x\r" 'my-mh-rmail)  ;@r{ call with C-x @key{RET}}

@i{Starting MH-E}

@end group
@end smalllisp

If you type an argument (@kbd{C-u}) or if @code{my-mh-screen-saved} is
@code{nil} (meaning a non-MH-E window configuration), the current
window configuration is saved, either the @samp{+inbox} buffer is
displayed or @code{mh-rmail} is run, and the MH-E window configuration
is shown. Otherwise, the MH-E window configuration is saved and the
original configuration is displayed.

@node Folders, Sending Mail, Reading Mail, Top
@chapter Organizing Your Mail with Folders

@cindex @samp{Folder} menu
@cindex @samp{Message} menu
@cindex folders
@cindex menu, @samp{Folder}
@cindex menu, @samp{Message}
@cindex using folders

This chapter discusses the things you can do with folders within MH-E.
The commands in this chapter are also found in the @samp{Folder} and
@samp{Message} menus.

@table @kbd
@kindex ?
@findex mh-help
@item ?
Display cheat sheet for the MH-E commands (@code{mh-help}).
@c -------------------------
@kindex !
@findex mh-refile-or-write-again
@item !
Repeat last output command (@code{mh-refile-or-write-again}).
@c -------------------------
@cindex @samp{Message > Copy Message to Folder...} menu item
@cindex menu item, @samp{Message > Copy Message to Folder...}
@kindex c
@findex mh-copy-msg
@item c
Copy range to folder (@code{mh-copy-msg}).
@c -------------------------
@kindex F ?
@findex mh-prefix-help
@item F ?
Display cheat sheet for the commands of the current prefix in
minibuffer (@code{mh-prefix-help}).
@c -------------------------
@kindex F '
@findex mh-index-ticked-messages
@item F '
Display ticked messages (@code{mh-index-ticked-messages}).
@c -------------------------
@kindex F c
@findex mh-catchup
@item F c
Delete range from the @samp{unseen} sequence (@code{mh-catchup}).
@c -------------------------
@kindex F k
@findex mh-kill-folder
@item F k
Remove folder (@code{mh-kill-folder}).
@c -------------------------
@cindex @samp{Folder > List Folders} menu item
@cindex menu item, @samp{Folder > List Folders}
@kindex F l
@findex mh-list-folders
@item F l
List all folders (@code{mh-list-folders}).
@c -------------------------
@cindex @samp{Folder > View New Messages} menu item
@cindex menu item, @samp{Folder > View New Messages}
@kindex F n
@findex mh-index-new-messages
@item F n
Display unseen messages (@code{mh-index-new-messages}).
@c -------------------------
@cindex @samp{Folder > Pack Folder} menu item
@cindex menu item, @samp{Folder > Pack Folder}
@kindex F p
@findex mh-pack-folder
@item F p
Pack folder (@code{mh-pack-folder}).
@c -------------------------
@kindex F q
@findex mh-index-sequenced-messages
@item F q
Display messages in any sequence (@code{mh-index-sequenced-messages}).
@c -------------------------
@cindex @samp{Folder > Rescan Folder} menu item
@cindex menu item, @samp{Folder > Rescan Folder}
@kindex F r
@findex mh-rescan-folder
@item F r
Rescan folder (@code{mh-rescan-folder}).
@c -------------------------
@cindex @samp{Folder > Search...} menu item
@cindex menu item, @samp{Folder > Search...}
@kindex F s
@findex mh-search
@item F s
Search your MH mail (@code{mh-search}).
@c -------------------------
@cindex @samp{Folder > Sort Folder} menu item
@cindex menu item, @samp{Folder > Sort Folder}
@kindex F S
@findex mh-sort-folder
@item F S
Sort folder (@code{mh-sort-folder}).
@c -------------------------
@kindex F u
@findex mh-undo-folder
@item F u
Undo all refiles and deletes in the current folder (@code{mh-undo-folder}).
@c -------------------------
@cindex @samp{Folder > Visit a Folder...} menu item
@cindex menu item, @samp{Folder > Visit a Folder...}
@kindex F v
@findex mh-visit-folder
@item F v
Visit folder (@code{mh-visit-folder}).
@c -------------------------
@cindex @samp{Message > Refile Message} menu item
@cindex menu item, @samp{Message > Refile Message}
@kindex o
@findex mh-refile-msg
@item o
Refile (output) range into folder (@code{mh-refile-msg}).
@c -------------------------
@cindex @samp{Folder > Quit MH-E} menu item
@cindex menu item, @samp{Folder > Quit MH-E}
@kindex q
@findex mh-quit
@item q
Quit the current MH-E folder (@code{mh-quit}).
@c -------------------------
@cindex @samp{Folder > Toggle Show/Folder} menu item
@cindex menu item, @samp{Folder > Toggle Show/Folder}
@kindex t
@findex mh-toggle-showing
@item t
Toggle between MH-Folder and MH-Folder Show modes
(@code{mh-toggle-showing}).
@c -------------------------
@cindex @samp{Message > Undo Delete/Refile} menu item
@cindex menu item, @samp{Message > Undo Delete/Refile}
@kindex u
@findex mh-undo
@item u
Undo pending deletes or refiles in range (@code{mh-undo}).
@c -------------------------
@cindex @samp{Message > Execute Delete/Refile} menu item
@cindex menu item, @samp{Message > Execute Delete/Refile}
@kindex x
@findex mh-execute-commands
@item x
Process outstanding delete and refile requests
(@code{mh-execute-commands}).
@end table

@cindex @samp{mh-folder} customization group
@cindex customization group, @samp{mh-folder}

The @samp{mh-folder} customization group is used to tune these
commands.

@vtable @code
@item mh-new-messages-folders
Folders searched for the @samp{unseen} sequence (default:
@code{Inbox}).
@c -------------------------
@item mh-ticked-messages-folders
Folders searched for @code{mh-tick-seq} (default: @code{t}).
@c -------------------------
@item mh-large-folder
The number of messages that indicates a large folder (default: 200).
@c -------------------------
@item mh-recenter-summary-flag
On means to recenter the summary window (default: @samp{off}).
@c -------------------------
@item mh-recursive-folders-flag
On means that commands which operate on folders do so recursively
(default: @samp{off}).
@c -------------------------
@item mh-sortm-args
Additional arguments for @command{sortm} (default: @code{nil}).
@end vtable

The following hooks are available.

@vtable @code
@item mh-after-commands-processed-hook
Hook run by @kbd{x} after performing outstanding refile and delete
requests (default: @code{nil}).
@c -------------------------
@item mh-before-commands-processed-hook
Hook run by @kbd{x} before performing outstanding refile and delete
requests (default: @code{nil}).
@c -------------------------
@item mh-before-quit-hook
Hook run by q before quitting MH-E (default: @code{nil}).
@c -------------------------
@item mh-folder-mode-hook
Hook run by @code{mh-folder-mode} when visiting a new folder (default:
@code{nil}).
@c -------------------------
@item mh-kill-folder-suppress-prompt-hook
Abnormal hook run at the beginning of @code{mh-kill-folder} (default:
@code{'mh-search-p}).
@c -------------------------
@item mh-quit-hook
Hook run by q after quitting MH-E (default: @code{nil}).
@c -------------------------
@item mh-refile-msg-hook
Hook run by o after marking each message for refiling (default:
@code{nil}).
@end vtable

The following faces are available for customizing the appearance of
the MH-Folder buffer. @xref{Scan Line Formats}.

@vtable @code
@item mh-folder-address
Recipient face.
@c -------------------------
@item mh-folder-body
Body text face.
@c -------------------------
@item mh-folder-cur-msg-number
Current message number face.
@c -------------------------
@item mh-folder-date
Date face.
@c -------------------------
@item mh-folder-deleted
Deleted message face.
@c -------------------------
@item mh-folder-followup
@samp{Re:} face.
@c -------------------------
@item mh-folder-msg-number
Message number face.
@c -------------------------
@item mh-folder-refiled
Refiled message face.
@c -------------------------
@vindex mh-scan-format-nmh
@vindex mh-scan-sent-to-me-sender-regexp
@item mh-folder-sent-to-me-hint
Fontification hint face in messages sent directly to us. The detection
of messages sent to us is governed by the scan format
@code{mh-scan-format-nmh} and regular expression
@code{mh-scan-sent-to-me-sender-regexp}.
@c -------------------------
@vindex mh-scan-format-nmh
@vindex mh-scan-sent-to-me-sender-regexp
@item mh-folder-scan-format
Sender face in messages sent directly to us. The detection of messages
sent to us is governed by the scan format @code{mh-scan-format-nmh}
and regular expression @code{mh-scan-sent-to-me-sender-regexp}.
@c -------------------------
@item mh-folder-subject
Subject face.
@c -------------------------
@item mh-folder-tick
Ticked message face.
@c -------------------------
@item mh-folder-to
@samp{To:} face.
@end vtable

@vindex mh-folder-mode-hook

The hook @code{mh-folder-mode-hook} is called when visiting a new
folder in MH-Folder mode. This could be used to set your own key
bindings, for example:

@vindex mh-folder-mode-hook, example

@smalllisp
@group
(defvar my-mh-init-done nil
  "Non-@code{nil} when one-time MH-E settings made.")

(defun my-mh-folder-mode-hook ()
  "Hook to set key bindings in MH-Folder mode."
  (if (not my-mh-init-done)             ; @r{only need to bind the keys once }
      (progn
        (local-set-key "//" 'my-search-msg)
        (local-set-key "b" 'mh-burst-digest)    ; @r{better use of @kbd{b}}
        (setq my-mh-init-done t))))

(add-hook 'mh-folder-mode-hook 'my-mh-folder-mode-hook)

(defun my-search-msg ()
  "Search for a regexp in the current message."
  (interactive)                         ; @r{user function}
  (save-window-excursion
    (other-window 1)                    ; @r{go to next window}
    (isearch-forward-regexp)))          ; @r{string search; hit return}
                                        ; @r{  when done}

@i{Create additional key bindings via mh-folder-mode-hook}

@end group
@end smalllisp

@cindex @command{folder}
@cindex @command{refile}
@cindex MH commands, @command{folder}
@cindex MH commands, @command{refile}
@findex mh-refile-msg
@kindex o
@vindex mh-refile-msg-hook

MH-E has analogies for each of the MH @command{folder} and
@command{refile} commands@footnote{See the sections
@uref{@value{MH-BOOK-HOME}/fol.html#Youfol, Your Current Folder:
folder} and @uref{@value{MH-BOOK-HOME}/fol.html#Movref, Moving and
Linking Messages: refile} in the MH book.}. To refile a message in
another folder, use the command @kbd{o} (@code{mh-refile-msg})
(mnemonic: ``output''). You are prompted for the folder name
(@pxref{Folder Selection}). Note that this command can also be used to
create folders. If you specify a folder that does not exist, you will
be prompted to create it. The hook @code{mh-refile-msg-hook} is called
after a message is marked to be refiled.

@findex mh-write-msg-to-file
@kindex !

If you are refiling several messages into the same folder, you can use
the command @kbd{!} (@code{mh-refile-or-write-again}) to repeat the
last refile or write (for the description of @kbd{>}
(@code{mh-write-msg-to-file}), @pxref{Files and Pipes}). You can use a
range in either case (for example, @kbd{C-u o 1 3 5-7 last:5 frombob
@key{RET}}, @pxref{Ranges}).

@cindex expunging refiles and deletes
@cindex undoing refiles and deletes
@findex mh-undo
@kindex u

If you've deleted a message or refiled it, but changed your mind, you
can cancel the action before you've executed it. Use @kbd{u}
(@code{mh-undo}) to undo a refile on or deletion of a single message.
You can also undo refiles and deletes for messages that are found in a
given range (@pxref{Ranges}).

@findex mh-undo-folder
@kindex F u

Alternatively, you can use @kbd{F u} (@code{mh-undo-folder}) to undo
all refiles and deletes in the current folder.

@findex mh-execute-commands
@kindex x

If you've marked messages to be deleted or refiled and you want to go
ahead and delete or refile the messages, use @kbd{x}
(@code{mh-execute-commands}). Many MH-E commands that may affect the
numbering of the messages (such as @kbd{F r} or @kbd{F p}) will ask if
you want to process refiles or deletes first and then either run
@kbd{x} for you or undo the pending refiles and deletes.

@kindex x
@vindex mh-after-commands-processed-hook
@vindex mh-before-commands-processed-hook

The command @kbd{x} runs @code{mh-before-commands-processed-hook}
before the commands are processed and
@code{mh-after-commands-processed-hook} after the commands are
processed. Variables that are useful with the former hook include
@code{mh-delete-list} and @code{mh-refile-list} which can be used to
see which changes will be made to the current folder,
@code{mh-current-folder}. Variables that are useful with the latter
hook include @code{mh-folders-changed}, which lists which folders were
affected by deletes and refiles. This list will always include the
current folder @code{mh-current-folder}.

@findex mh-copy-msg
@kindex c
@kindex o

If you wish to copy a message to another folder, you can use the
command @kbd{c} (@code{mh-copy-msg}) (see the @option{-link} argument
to @command{refile}(1)). Like the command @kbd{o}, this command
prompts you for the name of the target folder and you can specify a
range (@pxref{Ranges}). Note that unlike the command @kbd{o}, the copy
takes place immediately. The original copy remains in the current
folder.

@cindex junk mail
@cindex MH-Folder mode
@cindex MH-Folder Show mode
@cindex modes, MH-Folder
@cindex modes, MH-Folder Show
@cindex spam
@findex mh-toggle-showing
@kindex t

The command @kbd{t} (@code{mh-toggle-showing}) switches between
MH-Folder mode and MH-Folder Show mode@footnote{For you Emacs wizards,
this is implemented as an Emacs minor mode.}. MH-Folder mode turns off
the associated show buffer so that you can perform operations on the
messages quickly without reading them. This is an excellent way to
prune out your junk mail or to refile a group of messages to another
folder for later examination.

@cindex MH-Folder mode
@cindex MH-Show mode
@cindex modes, MH-Folder
@cindex modes, MH-Show
@cindex moving between messages
@kindex t
@vindex mh-recenter-summary-flag

When you use @kbd{t} to toggle from MH-Folder Show mode to MH-Folder
mode, the MH-Show buffer is hidden and the MH-Folder buffer is left
alone. Setting @code{mh-recenter-summary-flag} to a non-@code{nil}
value causes the toggle to display as many scan lines as possible,
with the cursor at the middle. The effect of
@code{mh-recenter-summary-flag} is rather useful, but it can be
annoying on a slow network connection.

@findex mh-visit-folder
@kindex F v
@vindex mh-large-folder

When you want to read the messages that you have refiled into folders,
use the command @kbd{F v} (@code{mh-visit-folder}) to visit the
folder. You are prompted for the folder name. The folder buffer will
show just unseen messages if there are any; otherwise, it will show
all the messages in the buffer as long there are fewer than
@code{mh-large-folder} messages. If there are more, then you are
prompted for a range of messages to scan. You can provide a prefix
argument in order to specify a range of messages to show when you
visit the folder (@pxref{Ranges}). In this case, regions are not used
to specify the range and @code{mh-large-folder} is ignored. Note that
this command can also be used to create folders. If you specify a
folder that does not exist, you will be prompted to create it.

@findex mh-search
@kindex F s

If you forget where you've refiled your messages, you can find them
using @kbd{F s} (@code{mh-search}). @xref{Searching}.

@cindex @command{procmail}
@cindex @samp{unseen} sequence
@cindex sequence, @samp{unseen}
@cindex Unix commands, @command{procmail}
@cindex unseen messages, viewing
@findex mh-index-new-messages
@kindex F n
@vindex mh-new-messages-folders

If you use a program such as @command{procmail} to file your incoming
mail automatically, you can display new, unseen, messages using the
command @kbd{F n} (@code{mh-index-new-messages}). All messages in the
@samp{unseen} sequence from the folders in
@code{mh-new-messages-folders} are listed. However, this list of
folders can be overridden with a prefix argument: with a prefix
argument, enter a space-separated list of folders, or nothing to
search all folders.

@cindex @samp{tick} sequence
@cindex sequence, @samp{tick}
@cindex ticked messages, viewing
@findex mh-index-ticked-messages
@kindex F '
@vindex mh-ticked-messages-folders

If you have ticked messages (@pxref{Sequences}), you can display them
using the command @kbd{F '} (@code{mh-index-ticked-messages}). All
messages in the @samp{tick} sequence from the folders in
@code{mh-ticked-messages-folders} are listed. With a prefix argument,
enter a space-separated list of folders, or nothing to search all
folders.

@findex mh-index-sequenced-messages
@kindex F q
@vindex mh-new-messages-folders

You can display messages in any sequence with the command @kbd{F q}
(@code{mh-index-sequenced-messages}). All messages from the folders in
@code{mh-new-messages-folders} in the sequence you provide are listed.
With a prefix argument, enter a space-separated list of folders at the
prompt, or nothing to search all folders.

@vindex mh-new-messages-folders
@vindex mh-recursive-folders-flag
@vindex mh-ticked-messages-folders

Set the options @code{mh-new-messages-folders} and
@code{mh-ticked-messages-folders} to @samp{Inbox} to search the
@samp{+inbox} folder or @samp{All} to search all of the top level
folders. Otherwise, list the folders that should be searched with the
@samp{Choose Folders} menu item. See @code{mh-recursive-folders-flag}.

@cindex buffers, @samp{*MH-E Folders*}
@cindex @samp{*MH-E Folders*}
@findex mh-kill-folder
@findex mh-list-folders
@findex mh-pack-folder
@findex mh-rescan-folder
@findex mh-sort-folder
@kindex F k
@kindex F l
@kindex F p
@kindex F r
@kindex F S

Other commands you can perform on folders include: @kbd{F l}
(@code{mh-list-folders}), to place a listing of all the folders in
your mail directory in a buffer called @samp{*MH-E Folders*}
(@pxref{Miscellaneous}); @kbd{F k} (@code{mh-kill-folder}), to remove
a folder; @kbd{F S} (@code{mh-sort-folder}), to sort the messages by
date (see @command{sortm}(1) to see how to sort by other criteria);
@kbd{F p} (@code{mh-pack-folder}), to pack a folder, removing gaps
from the numbering sequence; and @kbd{F r} (@code{mh-rescan-folder}),
to rescan the folder, which is useful to grab all messages in your
@samp{+inbox} after processing your new mail for the first time. If
you don't want to rescan the entire folder, the commands @kbd{F r} or
@kbd{F p} will accept a range (@pxref{Ranges}).

@kindex @key{TAB}
@vindex mh-recursive-folders-flag

By default, operations on folders work only one level at a time. Set
@code{mh-recursive-folders-flag} to non-@code{nil} to operate on all
folders. This mostly means that you'll be able to see all your folders
when you press @key{TAB} when prompted for a folder name.

@findex mh-search-p
@kindex k
@vindex mh-kill-folder-suppress-prompt-hooks

The hook @code{mh-kill-folder-suppress-prompt-hooks} is an abnormal
hook run at the beginning of the command @kbd{k}. The hook functions
are called with no arguments and should return a non-nil value to
suppress the normal prompt when you remove a folder. This is useful
for folders that are easily regenerated. The default value of
@code{mh-search-p} suppresses the prompt on folders generated by
searching.

@sp 1
@center @strong{NOTE}

@quotation
Use this hook with care. If there is a bug in your hook which returns
@code{t} on @samp{+inbox} and you press @kbd{k} by accident in the
@code{+inbox} folder, you will not be happy.
@end quotation
@sp 1

@cindex @command{sortm}
@cindex @file{.mh_profile}
@cindex files, @file{.mh_profile}
@cindex MH commands, @command{sortm}
@cindex MH profile component, @samp{sortm:}
@cindex @samp{sortm:} MH profile component
@kindex F S
@vindex mh-sortm-args

The option @code{mh-sortm-args} holds extra arguments to pass on to
the command @command{sortm}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/sorsor.html, Sorting Messages: sortm} in the
MH book.} when a prefix argument is used with @kbd{F S}. Normally
default arguments to @command{sortm} are specified in the MH profile.
This option may be used to provide an alternate view. For example,
@samp{'(\"-nolimit\" \"-textfield\" \"subject\")} is a useful setting.

@cindex exiting
@cindex quitting
@findex mh-quit
@kindex q

When you want to quit using MH-E and go back to editing, you can use
the @kbd{q} (@code{mh-quit}) command. This buries the buffers of the
current MH-E folder and restores the buffers that were present when
you first ran @kbd{M-x mh-rmail}. It also removes any MH-E working
buffers whose name begins with @samp{ *mh-} or @samp{*MH-E }
(@pxref{Miscellaneous}). You can later restore your MH-E session by
selecting the @samp{+inbox} buffer or by running @kbd{M-x mh-rmail}
again.

@findex mh-execute-commands
@kindex q
@vindex mh-before-quit-hook
@vindex mh-before-quit-hook, example
@vindex mh-quit-hook
@vindex mh-quit-hook, example

The two hooks @code{mh-before-quit-hook} and @code{mh-quit-hook} are
called by @kbd{q}. The former one is called before the quit occurs, so
you might use it to perform any MH-E operations; you could perform
some query and abort the quit or call @code{mh-execute-commands}, for
example. The latter is not run in an MH-E context, so you might use it
to modify the window setup. If you find that @kbd{q} buries a lot of
buffers that you would rather remove, you can use both
@code{mh-before-quit-hook} and @code{mh-quit-hook} to accomplish that.

@smalllisp
@group
(defvar my-mh-folder-buffer-to-delete nil
  "Folder buffer that is being quit.")

(defun my-mh-before-quit-hook ()
  "Save folder buffer that is to be deleted."
  (setq my-mh-folder-buffer-to-delete (current-buffer)))

(defun my-mh-quit-hook ()
  "Kill folder buffer rather than just bury it."
  (set-buffer my-mh-folder-buffer-to-delete)
  (if (get-buffer mh-show-buffer)
      (kill-buffer mh-show-buffer))
  (kill-buffer (current-buffer)))

@i{Kill MH-Folder buffer instead of burying it}
@end group
@end smalllisp

@cindex folders, renaming
@cindex renaming folders
@findex dired
@findex dired-do-rename

You can use dired to manipulate the folders themselves. For example, I
renamed my @samp{+out} folder to the more common @samp{+outbox} by
running dired on my mail directory (@kbd{M-x dired RET ~/Mail RET}),
moving my cursor to @samp{out} and using the command @kbd{R}
(@code{dired-do-rename}).

@node Sending Mail, Editing Drafts, Folders, Top
@chapter Sending Mail

@cindex sending mail
@findex mh-smail
@kindex M-x mh-smail

You can send a mail message in several ways. You can call @kbd{M-x
mh-smail} directly, or from the command line like this:

@cindex starting from command line

@smallexample
$ @kbd{emacs -f mh-smail}
@end smallexample

@findex goto-address-at-point
@vindex mail-user-agent

There are some commands that need to send a mail message, such as
@code{goto-address-at-point}. You can configure Emacs to have these
commands use MH-E by setting the option @code{mail-user-agent} to
@samp{Emacs interface to MH}.

@cindex @samp{Message} menu
@cindex menu, @samp{Message}

From within MH-E's MH-Folder mode, other methods of sending mail are
available as well. These can also be found in the @samp{Message} menu.

@table @kbd
@cindex @samp{Message > Edit Message Again} menu item
@cindex menu item, @samp{Message > Edit Message Again}
@kindex e
@findex mh-edit-again
@item e
Edit a message to send it again (@code{mh-edit-again}).
@c -------------------------
@cindex @samp{Message > Re-edit a Bounced Message} menu item
@cindex menu item, @samp{Message > Re-edit a Bounced Message}
@kindex E
@findex mh-extract-rejected-mail
@item E
Edit a message that was returned by the mail system
(@code{mh-extract-rejected-mail}).
@c -------------------------
@cindex @samp{Message > Forward Message...} menu item
@cindex menu item, @samp{Message > Forward Message...}
@kindex f
@findex mh-forward
@item f
Forward message (@code{mh-forward}).
@c -------------------------
@cindex @samp{Message > Reply to Message...} menu item
@cindex menu item, @samp{Message > Reply to Message...}
@kindex r
@findex mh-reply
@item r
Reply to a message (@code{mh-reply}).
@c -------------------------
@cindex @samp{Message > Compose a New Message} menu item
@cindex menu item, @samp{Message > Compose a New Message}
@kindex s
@findex mh-send
@item s
Compose a message (@code{mh-send}).
@c -------------------------
@cindex @samp{Message > Redistribute Message...} menu item
@cindex menu item, @samp{Message > Redistribute Message...}
@kindex M-d
@findex mh-redistribute
@item M-d
Redistribute a message (@code{mh-redistribute}).
@c -------------------------
@findex mh-smail
@item M-x mh-smail
Compose a message with the MH mail system.
@c -------------------------
@findex mh-smail-other-window
@item M-x mh-smail-other-window
Compose a message with the MH mail system in other window.
@end table

@cindex @samp{mh-sending-mail} customization group
@cindex customization group, @samp{mh-sending-mail}

In addition, several options from the @samp{mh-sending-mail}
customization group are useful when sending mail or replying to mail.
They are summarized in the following table.

@vtable @code
@item mh-compose-forward-as-mime-flag
On means that messages are forwarded as attachments (default:
@samp{on}).
@c -------------------------
@item mh-compose-letter-function
Hook run when starting a new draft (default: @code{nil}).
@c -------------------------
@item mh-compose-prompt-flag
On means prompt for header fields when composing a new draft (default:
@samp{off}).
@c -------------------------
@item mh-forward-subject-format
Format string for forwarded message subject (default: @code{"%s:
%s"}).
@c -------------------------
@item mh-insert-x-mailer-flag
On means append an @samp{X-Mailer:} header field to the header
(default: @samp{on}).
@c -------------------------
@item mh-redist-full-contents-flag
On means the @command{dist} command needs entire letter for
redistribution (default: @samp{off}).
@c -------------------------
@item mh-reply-default-reply-to
Sets the person or persons to whom a reply will be sent (default:
@samp{Prompt}).
@c -------------------------
@item mh-reply-show-message-flag
On means the MH-Show buffer is displayed using @kbd{r}
(@code{mh-reply}) (default: @samp{on}).
@end vtable

The following hooks are available.

@vtable @code
@item mh-forward-hook
Hook run by @code{mh-forward} on a forwarded letter (default:
@code{nil}).
@c -------------------------
@item mh-letter-mode-hook
Hook run by @code{mh-letter-mode} on a new letter (default:
@code{nil}).
@end vtable

The functions and options introduced here are explained in more detail
in the following sections.

@menu
* Composing::                   
* Replying::                    
* Forwarding::                  
* Redistributing::              
* Editing Again::               
@end menu

@node Composing, Replying, Sending Mail, Sending Mail
@section Composing

@cindex @file{.emacs}
@cindex MH-Folder mode
@cindex composing mail
@cindex draft
@cindex files, @file{.emacs}
@cindex modes, MH-Folder
@cindex sending mail
@findex mh-smail
@findex mh-smail-other-window
@kindex M-x mh-smail
@kindex M-x mh-smail-other-window

Outside of an MH-Folder buffer, you must call either @kbd{M-x
mh-smail} or @kbd{M-x mh-smail-other-window} to compose a new message.
The former command always creates a two-window layout with the current
buffer on top and the draft on the bottom. Use the latter command if
you would rather preserve the window layout. You may find adding the
following key bindings to @file{~/.emacs} useful:

@smalllisp
(global-set-key "\C-xm" 'mh-smail)
(global-set-key "\C-x4m" 'mh-smail-other-window)
@end smalllisp

@cindex draft folder
@cindex MH-Letter mode
@cindex modes, MH-Letter
@findex mh-send
@kindex m

From within a MH-Folder buffer, you can simply use the command @kbd{m}
(@code{mh-send}). However you invoke @code{mh-send}, your letter
appears in an Emacs buffer whose mode is MH-Letter (to see what the
buffer looks like, @pxref{Sending Mail Tour}). MH-Letter mode allows
you to edit your message, to check the validity of the recipients, to
insert attachments and other messages into your message, and to send
the message. We'll go more into depth about editing a
@dfn{draft}@footnote{I highly recommend that you use a @dfn{draft
folder} so that you can edit several drafts in parallel. To do so,
create a folder named @samp{+drafts} for example, and add the profile
component @samp{Draft-Folder: drafts} (see @code{mh-profile}(5)).} (a
message you're composing) in just a moment (@pxref{Editing Drafts}).

@vindex mh-compose-prompt-flag

If you prefer to be prompted for the recipient and subject fields
before the MH-Letter buffer appears, turn on the option
@code{mh-compose-prompt-flag}.

@cindex header field, @samp{X-Mailer:}
@cindex @samp{X-Mailer:} header field
@vindex mh-insert-x-mailer-flag

MH-E adds an @samp{X-Mailer:} header field to the header that includes
the version of MH-E and Emacs that you are using. If you don't want to
participate in our marketing, you can turn off the option
@code{mh-insert-x-mailer-flag}.

@cindex @command{repl}
@cindex @file{components}
@cindex MH commands, @command{repl}
@cindex MH-Letter mode
@cindex Mail mode
@cindex files, @file{components}
@cindex modes, MH-Letter
@cindex modes, Mail
@vindex mail-mode-hook
@vindex mh-letter-mode-hook
@vindex text-mode-hook

Two hooks are provided to run commands on your freshly created draft.
The first hook, @code{mh-letter-mode-hook}, allows you to do some
processing before editing a letter@footnote{Actually, because
MH-Letter mode inherits from Mail mode, the hooks
@code{text-mode-hook} and @code{mail-mode-hook} are run (in that
order) before @code{mh-letter-mode-hook}.}. For example, you may wish
to modify the header after @command{repl} has done its work, or you
may have a complicated @file{components} file and need to tell MH-E
where the cursor should go. Here's an example of how you would use
this hook.

@findex mh-insert-signature, example

@smalllisp
@group
(defvar letter-mode-init-done-flag nil
  "Non-nil means one-time MH-E settings have been made.")

(defun my-mh-letter-mode-hook ()
  "Prepare letter for editing."
  (when (not letter-mode-init-done)     ; @r{only need to bind the keys once}
    (local-set-key "\C-ctb" 'add-enriched-text)
    (local-set-key "\C-cti" 'add-enriched-text)
    (local-set-key "\C-ctf" 'add-enriched-text)
    (local-set-key "\C-cts" 'add-enriched-text)
    (local-set-key "\C-ctB" 'add-enriched-text)
    (local-set-key "\C-ctu" 'add-enriched-text)
    (local-set-key "\C-ctc" 'add-enriched-text)
    (setq letter-mode-init-done t))
  (save-excursion
    (goto-char (point-max))             ; @r{go to end of message to}
    (mh-insert-signature)))             ;   @r{insert signature}

@i{Prepare draft for editing via mh-letter-mode-hook}

@end group
@end smalllisp

The function, @code{add-enriched-text} is defined in the example in
@ref{Adding Attachments}.

@vindex mh-compose-letter-function
@vindex mh-letter-mode-hook

The second hook, a function really, is
@code{mh-compose-letter-function}. Like @code{mh-letter-mode-hook}, it
is called just before editing a new message; however, it is the last
function called before you edit your message. The consequence of this
is that you can write a function to write and send the message for
you. This function is passed three arguments: the contents of the
@samp{To:}, @samp{Subject:}, and @samp{Cc:} header fields.

@node Replying, Forwarding, Composing, Sending Mail
@section Replying to Mail

@cindex @command{mhl}
@cindex @file{mhl.reply}
@cindex MH commands, @command{mhl}
@cindex files, @file{mhl.reply}
@cindex replying
@findex mh-reply
@kindex r

To compose a reply to a message, use the @kbd{r} (@code{mh-reply})
command.

When you reply to a message, you are first prompted with @samp{Reply
to whom?}. You have several choices here.

@quotation
@multitable @columnfractions .20 .80
@c @headitem Response @tab Reply Goes To
@c XXX @headitem not yet supported by SourceForge's texi2pdf.
@item @b{Response} @tab @b{Reply Goes To}
@c -------------------------
@item @kbd{from}
@tab
The person who sent the message. This is the default, so @key{RET} is
sufficient.
@c -------------------------
@item @kbd{to}
@tab
Replies to the sender, plus all recipients in the @samp{To:} header field.
@c -------------------------
@item @kbd{cc}@*@kbd{all}
@tab
Forms a reply to the addresses in the @samp{Mail-Followup-To:} header
field if one exists; otherwise forms a reply to the sender, plus all
recipients.
@end multitable
@end quotation

@cindex @command{repl}
@cindex MH commands, @command{repl}
@vindex mh-reply-default-reply-to

Depending on your answer, @command{repl}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/reprep.html, Replying to Messages: repl} in
the MH book.} is given a different argument to form your reply.
Specifically, a choice of @kbd{from} or none at all runs @samp{repl
-nocc all}, and a choice of @kbd{to} runs @samp{repl -cc to}. Finally,
either @kbd{cc} or @kbd{all} runs @samp{repl -cc all -nocc me}. If you
find that most of the time you specify one of these choices when you
reply to a message, you can change the option
@code{mh-reply-default-reply-to} from its default value of
@samp{Prompt} to one of the choices listed above. You can always edit
the recipients in the draft.

@cindex @samp{repl:} MH profile component
@cindex MH profile component, @samp{repl:}
@cindex MH-Letter mode
@cindex MH-Show mode
@cindex draft
@cindex modes, MH-Letter
@cindex modes, MH-Show

Two windows are then created. One window contains the message to which
you are replying in an MH-Show buffer. Your draft, in MH-Letter mode
(@pxref{Editing Drafts}), is in the other window. If the reply draft
was not one that you expected, check the things that affect the
behavior of @command{repl} which include the @samp{repl:} profile
component and the @file{replcomps} and @file{replgroupcomps} files.

If you supply a prefix argument (as in @kbd{C-u r}), the message you
are replying to is inserted in your reply after having first been run
through @command{mhl} with the format file @file{mhl.reply}. See
@command{mhl}(1) or the section
@uref{@value{MH-BOOK-HOME}/shomes.html#Usisho, Using mhl} in the MH
book to see how you can modify the default @file{mhl.reply} file.

@vindex mh-yank-behavior

Alternatively, you can customize the option @code{mh-yank-behavior}
and choose one of its @samp{Automatically} variants to do the same
thing. @xref{Inserting Letter}. If you do so, the prefix argument has
no effect.

Another way to include the message automatically in your draft is to
use @samp{repl: -filter repl.filter} in your MH profile.

@vindex mh-reply-show-message-flag

If you include the message automatically, you can hide the MH-Show
buffer by turning off the option @code{mh-reply-show-message-flag}.

If you wish to customize the header or other parts of the reply draft,
please see @command{repl}(1) and @code{mh-format}(5).

@node Forwarding, Redistributing, Replying, Sending Mail
@section Forwarding Mail

@cindex @command{forw}
@cindex draft
@cindex forwarding
@cindex MH commands, @command{forw}
@findex mh-forward
@kindex f
@vindex mh-forward-hook

To forward a message, use the @kbd{f} (@code{mh-forward}) command. You
are prompted for the @samp{To:} and @samp{cc:} recipients. You are
given a draft to edit that looks like it would if you had run the MH
command @command{forw}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/forfor.html, Forwarding Messages: forw} in
the MH book.}. You can then add some text (@pxref{Editing Drafts}).
You can forward several messages by using a range (@pxref{Ranges}).
All of the messages in the range are inserted into your draft. The
hook @code{mh-forward-hook} is called on the draft.

@cindex @file{.mh_profile}
@cindex files, @file{.mh_profile}
@cindex MH profile component, @samp{forw:}
@cindex @samp{forw:} MH profile component
@vindex mh-compose-forward-as-mime-flag

By default, the option @code{mh-compose-forward-as-mime-flag} is on
which means that the forwarded messages are included as attachments.
If you would prefer to forward your messages verbatim (as text,
inline), then turn off this option. Forwarding messages verbatim works
well for short, textual messages, but your recipient won't be able to
view any non-textual attachments that were in the forwarded message.
Be aware that if you have @samp{forw: -mime} in your MH profile, then
forwarded messages will always be included as attachments regardless
of the settings of @code{mh-compose-forward-as-mime-flag}.

@vindex mh-forward-subject-format

The format of the @samp{Subject:} header field for forwarded messages
is controlled by the option @code{mh-forward-subject-format}. This
option is a string which includes two escapes (@samp{%s}). The first
@samp{%s} is replaced with the sender of the original message, and the
second one is replaced with the original @samp{Subject:}. The default
value of @code{"%s: %s"} takes a message with the header:

@smallexample
@group
To: Bill Wohler <wohler@@stop.mail-abuse.org>
Subject: Re: 49er football
From: Greg DesBrisay <gd@@stop.mail-abuse.org>
@end group
@end smallexample

and creates a subject header field of:

@smallexample
Subject: Greg DesBrisay: Re: 49er football
@end smallexample

@node Redistributing, Editing Again, Forwarding, Sending Mail
@section Redistributing Your Mail

@cindex @command{dist}
@cindex MH commands, @command{dist}
@cindex redistributing
@findex mh-redistribute
@kindex M-d

The command @kbd{M-d} (@code{mh-redistribute}) is similar in function
to forwarding mail, but it does not allow you to edit the message, nor
does it add your name to the @samp{From:} header field. It appears to
the recipient as if the message had come from the original sender.
When you run this command, you are prompted for the recipients.

@findex mh-edit-again
@kindex e

For more information on redistributing messages, see
@command{dist}(1). Also investigate the command @kbd{e}
(@code{mh-edit-again}) for another way to redistribute messages
(@pxref{Editing Again}).

@cindex @command{send}
@cindex MH commands, @command{send}
@vindex mh-redist-full-contents-flag

The option @code{mh-redist-full-contents-flag} must be turned on if
@command{dist}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/disdis.html, Distributing Messages with
dist} in the MH book.} requires the whole letter for redistribution,
which is the case if @command{send}@footnote{See the section
@uref{@value{MH-BOOK-HOME}/sensen.html, Sending Some Mail: comp send}
in the MH book.} is compiled with the @sc{berk} option (which many
people abhor). If you find that MH will not allow you to redistribute
a message that has been redistributed before, turn off this option.

@node Editing Again,  , Redistributing, Sending Mail
@section Editing Old Drafts and Bounced Messages

@cindex @file{draft}
@cindex files, @file{draft}
@cindex re-editing drafts
@findex mh-edit-again
@kindex F v drafts
@kindex e
@kindex n

If you don't complete a draft for one reason or another, and if the
draft buffer is no longer available, you can pick your draft up again
with @kbd{e} (@code{mh-edit-again}). If you don't use a draft
folder, your last @file{draft} file will be used. If you use draft
folders, you'll need to visit the draft folder with @kbd{F v drafts
@key{RET}}, use @kbd{n} to move to the appropriate message, and then
use @kbd{e} to prepare the message for editing.

@kindex e

The @kbd{e} command can also be used to take messages that were sent
to you and to send them to more people.

@cindex Mailer-Daemon
@findex mh-extract-rejected-mail
@kindex C-c C-c
@kindex E

Don't use @kbd{e} to re-edit a message from a @i{Mailer-Daemon} who
complained that your mail wasn't posted for some reason or another. In
this case, use @kbd{E} (@code{mh-extract-rejected-mail}) to prepare
the message for editing by removing the @i{Mailer-Daemon} envelope and
unneeded header fields. Fix whatever addressing problem you had, and
send the message again with @kbd{C-c C-c}.

@node Editing Drafts, Aliases, Sending Mail, Top
@chapter Editing a Draft

@cindex @samp{Letter} menu
@cindex MH-Letter mode
@cindex draft
@cindex editing draft
@cindex menu, @samp{Letter}
@cindex modes, MH-Letter

When you edit a message that you want to send (called a @dfn{draft} in
this case), the mode used is MH-Letter. This mode provides several
commands in addition to the normal Emacs editing commands to help you
edit your draft. These can also be found in the @samp{Letter} menu.

@table @kbd
@kindex @key{SPC}
@findex mh-letter-complete-or-space
@item @key{SPC}
Perform completion or insert space (@code{mh-letter-complete-or-space}).
@c -------------------------
@kindex M-@key{TAB}
@findex mh-letter-complete
@item M-@key{TAB}
Perform completion on header field or word preceding point
(@code{mh-letter-complete}).
@c -------------------------
@kindex , (comma)
@findex mh-letter-confirm-address
@item , (comma)
Flash alias expansion (@code{mh-letter-confirm-address}).
@c -------------------------
@kindex @key{TAB}
@findex mh-letter-next-header-field-or-indent
@item @key{TAB}
Cycle to next field (@code{mh-letter-next-header-field-or-indent}).
@c -------------------------
@kindex S-@key{TAB}
@findex mh-letter-previous-header-field
@item S-@key{TAB}
Cycle to the previous header field
(@code{mh-letter-previous-header-field}).
@c -------------------------
@kindex C-c ?
@findex mh-help
@item C-c ?
Display cheat sheet for the MH-E commands (@code{mh-help}).
@c -------------------------
@cindex @samp{Letter > Send This Draft} menu item
@cindex menu item, @samp{Letter > Send This Draft}
@kindex C-c C-c
@findex mh-send-letter
@item C-c C-c
Save draft and send message (@code{mh-send-letter}).
@c -------------------------
@kindex C-c C-d
@findex mh-insert-identity
@item C-c C-d
Insert fields specified by the given identity
(@code{mh-insert-identity}). @xref{Identities}.
@c -------------------------
@cindex @samp{Letter > Pull in All Compositions (MH)} menu item
@cindex menu item, @samp{Letter > Pull in All Compositions (MH)}
@kindex C-c C-e
@findex mh-mh-to-mime
@item C-c C-e
Compose @sc{mime} message from MH-style directives
(@code{mh-mh-to-mime}).
@c -------------------------
@kindex C-c C-f C-a
@kindex C-c C-f a
@findex mh-to-field
@item C-c C-f C-a
@itemx C-c C-f a
Move to @samp{Mail-Reply-To:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-b
@kindex C-c C-f b
@item C-c C-f C-b
@itemx C-c C-f b
Move to @samp{Bcc:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-c
@kindex C-c C-f c
@item C-c C-f C-c
@itemx C-c C-f c
Move to @samp{Cc:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-d
@kindex C-c C-f d
@item C-c C-f C-d
@itemx C-c C-f d
Move to @samp{Dcc:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-f
@kindex C-c C-f f
@findex mh-to-fcc
@item C-c C-f C-f
@itemx C-c C-f f
Move to @samp{Fcc:} header field (@code{mh-to-fcc}).
@c -------------------------
@kindex C-c C-f C-l
@kindex C-c C-f l
@item C-c C-f C-l
@itemx C-c C-f l
Move to @samp{Mail-Followup-To:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-m
@kindex C-c C-f m
@item C-c C-f C-m
@itemx C-c C-f m
Move to @samp{From:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-r
@kindex C-c C-f r
@item C-c C-f C-r
@itemx C-c C-f r
Move to @samp{Reply-To:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-s
@kindex C-c C-f s
@item C-c C-f C-s
@itemx C-c C-f s
Move to @samp{Subject:} header field (@code{mh-to-field}).
@c -------------------------
@kindex C-c C-f C-t
@kindex C-c C-f t
@item C-c C-f C-t
@itemx C-c C-f t
Move to @samp{To:} header field (@code{mh-to-field}).
@c -------------------------
@cindex @samp{Letter > Insert a Message...} menu item
@cindex menu item, @samp{Letter > Insert a Message...}
@kindex C-c C-i
@findex mh-insert-letter
@item C-c C-i
Insert a message (@code{mh-insert-letter}).
@c -------------------------
@kindex C-c C-m C-e
@findex mh-mml-secure-message-encrypt
@item C-c C-m C-e
Add tag to encrypt the message (@code{mh-mml-secure-message-encrypt}).
@c -------------------------
@cindex @samp{Letter > Compose Forward...} menu item
@cindex menu item, @samp{Letter > Compose Forward...}
@kindex C-c C-m C-f
@kindex C-c C-m f
@findex mh-compose-forward
@item C-c C-m C-f
@itemx C-c C-m f
Add tag to forward a message (@code{mh-compose-forward}).
@c -------------------------
@cindex @samp{Letter > Compose Get File (MH)...} menu item
@cindex menu item, @samp{Letter > Compose Get File (MH)...}
@kindex C-c C-m C-g
@kindex C-c C-m g
@findex mh-mh-compose-anon-ftp
@item C-c C-m C-g
@itemx C-c C-m g
Add tag to include anonymous ftp reference to a file
(@code{mh-mh-compose-anon-ftp}).
@c -------------------------
@cindex @samp{Letter > Compose Insertion...} menu item
@cindex menu item, @samp{Letter > Compose Insertion...}
@kindex C-c C-m C-i
@kindex C-c C-m i
@findex mh-compose-insertion
@item C-c C-m C-i
@itemx C-c C-m i
Add tag to include a file such as an image or sound
(@code{mh-compose-insertion}).
@c -------------------------
@cindex @samp{Letter > Pull in All Compositions (MML)} menu item
@cindex menu item, @samp{Letter > Pull in All Compositions (MML)}
@kindex C-c C-m C-m
@kindex C-c C-m m
@findex mh-mml-to-mime
@item C-c C-m C-m
@itemx C-c C-m m
Compose @sc{mime} message from MML tags (@code{mh-mml-to-mime}).
@c -------------------------
@kindex C-c C-m C-n
@kindex C-c C-m n
@findex mh-mml-unsecure-message
@item C-c C-m C-n
@itemx C-c C-m n
Remove any secure message tags (@code{mh-mml-unsecure-message}).
@c -------------------------
@kindex C-c C-m C-s
@findex mh-mml-secure-message-sign
@item C-c C-m C-s
Add tag to sign the message (@code{mh-mml-secure-message-sign}).
@c -------------------------
@cindex @samp{Letter > Compose Compressed tar (MH)...} menu item
@cindex menu item, @samp{Letter > Compose Compressed tar (MH)...}
@kindex C-c C-m C-t
@kindex C-c C-m t
@findex mh-mh-compose-external-compressed-tar
@item C-c C-m C-t
@itemx C-c C-m t
Add tag to include anonymous ftp reference to a compressed tar file
(@code{mh-mh-compose-external-compressed-tar}).
@c -------------------------
@cindex @samp{Letter > Revert to Non-MIME Edit (MH)} menu item
@cindex menu item, @samp{Letter > Revert to Non-MIME Edit (MH)}
@kindex C-c C-m C-u
@kindex C-c C-m u
@findex mh-mh-to-mime-undo
@item C-c C-m C-u
@itemx C-c C-m u
Undo effects of @kbd{C-c C-e} (@code{mh-mh-to-mime-undo}).
@c -------------------------
@kindex C-c C-m C-x
@kindex C-c C-m x
@findex mh-mh-compose-external-type
@item C-c C-m C-x
@itemx C-c C-m x
Add tag to refer to a remote file
(@code{mh-mh-compose-external-type}).
@c -------------------------
@kindex C-c C-m e e
@findex mh-mml-secure-message-encrypt
@item C-c C-m e e
Add tag to encrypt the message (@code{mh-mml-secure-message-encrypt}).
@c -------------------------
@kindex C-c C-m e s
@findex mh-mml-secure-message-signencrypt
@item C-c C-m e s
Add tag to encrypt and sign the message@*
(@code{mh-mml-secure-message-signencrypt}).
@c -------------------------
@kindex C-c C-m s e
@findex mh-mml-secure-message-signencrypt
@item C-c C-m s e
Add tag to encrypt and sign the message@*
(@code{mh-mml-secure-message-signencrypt}).
@c -------------------------
@kindex C-c C-m s s
@findex mh-mml-secure-message-sign
@item C-c C-m s s
Add tag to sign the message (@code{mh-mml-secure-message-sign}).
@c -------------------------
@cindex @samp{Letter > Split Current Line} menu item
@cindex menu item, @samp{Letter > Split Current Line}
@kindex C-c C-o
@findex mh-open-line
@item C-c C-o
Insert a newline and leave point before it (@code{mh-open-line}).
@c -------------------------
@cindex @samp{Letter > Kill This Draft} menu item
@cindex menu item, @samp{Letter > Kill This Draft}
@kindex C-c C-q
@findex mh-fully-kill-draft
@item C-c C-q
Quit editing and delete draft message (@code{mh-fully-kill-draft}).
@c -------------------------
@cindex @samp{Letter > Insert Signature} menu item
@cindex menu item, @samp{Letter > Insert Signature}
@kindex C-c C-s
@findex mh-insert-signature
@item C-c C-s
Insert signature in message (@code{mh-insert-signature}).
@c -------------------------
@kindex C-c C-t
@findex mh-letter-toggle-header-field-display
@item C-c C-t
Toggle display of header field at point
(@code{mh-letter-toggle-header-field-display}).
@c -------------------------
@cindex @samp{Letter > Check Recipient} menu item
@cindex menu item, @samp{Letter > Check Recipient}
@kindex C-c C-w
@findex mh-check-whom
@item C-c C-w
Verify recipients, showing expansion of any aliases
(@code{mh-check-whom}).
@c -------------------------
@cindex @samp{Letter > Yank Current Message} menu item
@cindex menu item, @samp{Letter > Yank Current Message}
@kindex C-c C-y
@findex mh-yank-cur-msg
@item C-c C-y
Insert the current message into the draft buffer
(@code{mh-yank-cur-msg}).
@c -------------------------
@kindex C-c M-d
@findex mh-insert-auto-fields
@item C-c M-d
Insert custom fields if recipient is found in
@code{mh-auto-fields-list} (@code{mh-insert-auto-fields}).
@xref{Identities}.
@end table

@cindex @samp{mh-letter} customization group
@cindex customization group, @samp{mh-letter}

Several options from the @samp{mh-letter} customization group are used
while editing a draft.

@vtable @code
@item mh-compose-insertion
Type of @sc{mime} message tags in messages (default: @samp{MML} if
available; otherwise @samp{MH}).
@c -------------------------
@item mh-compose-skipped-header-fields
List of header fields to skip over when navigating in draft (default:
@code{'("From"} @code{"Organization"} @code{"References"}
@code{"In-Reply-To"} @code{"X-Face"} @code{"Face"}
@code{"X-Image-URL"} @code{"X-Mailer")}.
@c -------------------------
@item mh-compose-space-does-completion-flag
On means @key{SPC} does completion in message header (default:
@samp{off}).
@c -------------------------
@item mh-delete-yanked-msg-window-flag
On means delete any window displaying the message (default: @samp{off}).
@c -------------------------
@item mh-extract-from-attribution-verb
Verb to use for attribution when a message is yanked by @kbd{C-c C-y}
(default: @code{"wrote:"}).
@c -------------------------
@item mh-ins-buf-prefix
String to put before each line of a yanked or inserted message
(default: @code{"> "}).
@c -------------------------
@item mh-letter-complete-function
Function to call when completing outside of address or folder fields
(default: @code{ispell-complete-word}).
@c -------------------------
@item mh-letter-fill-column
Fill column to use in MH-Letter mode (default: 72).
@c -------------------------
@item mh-mml-method-default
Default method to use in security tags (default: @samp{PGP (MIME)} if
support for it is available; otherwise @samp{None}).
@c -------------------------
@item mh-signature-file-name
Source of user's signature (default: @code{"~/.signature"}).
@c -------------------------
@item mh-signature-separator-flag
On means a signature separator should be inserted (default:
@samp{on}).
@c -------------------------
@item mh-x-face-file
File containing X-Face or Face header field to insert in outgoing mail.
(default: @code{"~/.face"}).
@c -------------------------
@item mh-yank-behavior
Controls which part of a message is yanked by @kbd{C-c C-y} (default:
@samp{Body With Attribution}).
@end vtable

The following hooks are available.

@vtable @code
@item mail-citation-hook
Hook for modifying a citation just inserted in the mail buffer
(default: @code{nil}).
@c -------------------------
@item mh-before-send-letter-hook
Hook run at the beginning of the @kbd{C-c C-c} command (default:
@samp{nil}).
@c -------------------------
@item mh-mh-to-mime-hook
Hook run on the formatted letter by @kbd{C-c C-e} (default:
@samp{nil}).
@c -------------------------
@item mh-insert-signature-hook
Hook run by @kbd{C-c C-s} after signature has been inserted (default:
@code{nil}).
@end vtable

The following face is available.

@vtable @code
@item mh-letter-header-field
Editable header field value face in draft buffers.
@end vtable

The commands and options introduced here are explained in more
detail in the following sections.

@menu
* Editing Message::             
* Inserting Letter::            
* Inserting Messages::          
* Signature::                   
* Picture::                     
* Adding Attachments::          
* Sending PGP::                 
* Checking Recipients::         
* Sending Message::             
* Killing Draft::               
@end menu

@node Editing Message, Inserting Letter, Editing Drafts, Editing Drafts
@section Editing the Message

@cindex @samp{Bcc:} header field
@cindex @samp{Cc:} header field
@cindex @samp{Dcc:} header field
@cindex @samp{From:} header field
@cindex @samp{Mail-Followup-To:} header field
@cindex @samp{Mail-Reply-To:} header field
@cindex @samp{Reply-To:} header field
@cindex @samp{Subject:} header field
@cindex @samp{To:} header field
@cindex editing header
@cindex header field, @samp{Bcc:}
@cindex header field, @samp{Cc:}
@cindex header field, @samp{Dcc:}
@cindex header field, @samp{From:}
@cindex header field, @samp{Mail-Followup-To:}
@cindex header field, @samp{Mail-Reply-To:}
@cindex header field, @samp{Reply-To:}
@cindex header field, @samp{Subject:}
@cindex header field, @samp{To:}
@findex mh-to-field
@kindex C-c C-f C-t
@kindex C-c C-f t

Because the header is part of the message, you can edit the header
fields as you wish. However, several convenience commands exist to
help you create and edit them. For example, the command @kbd{C-c C-f
C-t} (@code{mh-to-field}; alternatively, @kbd{C-c C-f t}) moves the
cursor to the @samp{To:} header field, creating it if necessary. The
commands for moving to the @samp{Cc:}, @samp{Subject:}, @samp{From:},
@samp{Reply-To:}, @samp{Mail-Reply-To:}, @samp{Mail-Followup-To},
@samp{Bcc:}, and @samp{Dcc:} header fields are similar.

@findex mh-to-fcc
@kindex C-c C-f C-f
@kindex C-c C-f f

One command behaves differently from the others, namely, @kbd{C-c C-f
C-f} (@code{mh-to-fcc}; alternatively, @kbd{C-c C-f f}). This command
will prompt you for the folder name in which to file a copy of the
draft. @xref{Folder Selection}.

@findex indent-relative
@findex mh-letter-next-header-field-or-indent
@findex mh-letter-previous-header-field
@kindex @key{TAB}
@kindex S-@key{TAB}
@vindex mh-compose-skipped-header-fields
@vindex mh-letter-header-field

Within the header of the message, the command@* @key{TAB}
(@code{mh-letter-next-header-field-or-indent}) moves between fields
that are highlighted with the face @code{mh-letter-header-field},
skipping those fields listed in
@code{mh-compose-skipped-header-fields}. After the last field, this
command then moves point to the message body before cycling back to
the first field. If point is already past the first line of the
message body, then this command indents by calling
@code{indent-relative} with the given prefix argument. The command
@kbd{S-@key{TAB}} (@code{mh-letter-previous-header-field}) moves
backwards between the fields and cycles to the body of the message
after the first field. Unlike the command @key{TAB}, it will always
take point to the last field from anywhere in the body.

@cindex alias completion
@cindex completion
@cindex spell check
@findex ispell-complete-word
@findex mh-letter-complete
@findex mh-letter-complete-or-space
@findex mh-letter-confirm-address
@kindex , (comma)
@kindex @key{SPC}
@kindex M-@key{TAB}
@vindex mh-alias-flash-on-comma
@vindex mh-compose-space-does-completion-flag
@vindex mh-letter-complete-function

If the field contains addresses (for example, @samp{To:} or
@samp{Cc:}) or folders (for example, @samp{Fcc:}) then the command
@kbd{M-@key{TAB}} (@code{mh-letter-complete}) will provide alias
completion (@pxref{Aliases}). In the body of the message,
@kbd{M-@key{TAB}} runs @code{mh-letter-complete-function} instead,
which is set to @samp{'ispell-complete-word} by default. The command
@kbd{M-@key{TAB}} (@code{mh-letter-complete}) takes a prefix argument
that is passed to the @code{mh-letter-complete-function}. In addition,
turn on the option @code{mh-compose-space-does-completion-flag} to use
the command @key{SPC} (@code{mh-letter-complete-or-space}) to perform
completion in the header as well; use a prefix argument to specify
more than one space. Addresses are separated by a comma; when you
press the comma, the command @code{mh-letter-confirm-address} flashes
the alias expansion in the minibuffer if
@code{mh-alias-flash-on-comma} is turned on.

@c XXX Document the replacement for the inaccessible 'long argument.
 
@findex mh-letter-toggle-header-field-display
@kindex C-c C-t

Use the command @kbd{C-c C-t}
@code{mh-letter-toggle-header-field-display} to display truncated
header fields. This command is a toggle so entering it again will hide
the field. This command takes a prefix argument: if negative then the
field is hidden, if positive then the field is displayed (for example,
@kbd{C-u C-c C-t}).

Be sure to leave a row of dashes or a blank line between the header
and the body of the message.

@vindex mh-letter-fill-column

The body of the message is edited as you would edit any Emacs buffer
although there are a few commands and options to assist you. You can
change the fill column in MH-Letter mode with the option
@code{mh-letter-fill-column}. By default, this option is 72 to allow
others to quote your message without line wrapping.

@cindex filling paragraphs
@cindex paragraphs, filling
@findex fill-paragraph
@kindex M-q
@vindex mh-ins-buf-prefix

You'll often include messages that were sent from user agents that
haven't yet realized that paragraphs consist of more than a single
line. This makes for long lines that wrap in an ugly fashion. You'll
find that @kbd{M-q} (@code{fill-paragraph}) works well even on these
quoted messages, even if they are nested, just as long as all of the
quotes match the value of @code{mh-ins-buf-prefix} (@pxref{Inserting
Letter}). For example, let's assume you have the following in your
draft:

@smallexample
@group
> Hopefully this gives you an idea of what I'm currently doing. I'm \
not sure yet whether I'm completely satisfied with my setup, but    \
it's worked okay for me so far.
@end group
@end smallexample

Running @kbd{M-q} on this paragraph produces:

@smallexample
@group
> Hopefully this gives you an idea of what I'm currently doing. I'm not
> sure yet whether I'm completely satisfied with my setup, but it's
> worked okay for me so far.
@end group
@end smallexample

@findex mh-open-line
@findex open-line
@kindex C-c C-o
@kindex C-o

The command @kbd{C-c C-o} (@code{mh-open-line}) is similar to the
command @kbd{C-o} (@code{open-line}) in that it inserts a newline
after point. It differs in that it also inserts the right number of
quoting characters and spaces so that the next line begins in the same
column as it was. This is useful when breaking up paragraphs in
replies. For example, if this command was used when point was after
the first period in the paragraph above, the result would be this:

@smallexample
@group
> Hopefully this gives you an idea of what I'm currently doing.

>                                                               I'm not
> sure yet whether I'm completely satisfied with my setup, but it's
> worked okay for me so far.
@end group
@end smallexample

@node Inserting Letter, Inserting Messages, Editing Message, Editing Drafts
@section Inserting Letter to Which You're Replying

@cindex inserting messages
@cindex replying to messages
@cindex yanking messages
@findex mh-yank-cur-msg
@kindex C-c C-y
@vindex mh-ins-buf-prefix

It is often useful to insert a snippet of text from a letter that
someone mailed to provide some context for your reply. The command
@kbd{C-c C-y} (@code{mh-yank-cur-msg}) does this by adding an
attribution, yanking a portion of text from the message to which
you're replying, and inserting @code{mh-ins-buf-prefix} (@samp{> })
before each line.

@smallexample
@group
Michael W Thelen <thelenm@@stop.mail-abuse.org> wrote:

> Hopefully this gives you an idea of what I'm currently doing. I'm not
> sure yet whether I'm completely satisfied with my setup, but it's
> worked okay for me so far.
@end group
@end smallexample

@vindex mh-extract-from-attribution-verb

The attribution consists of the sender's name and email address
followed by the content of the option
@code{mh-extract-from-attribution-verb}. This option can be set to