Copyright (c) 2014 University of Cambridge
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-+-------------------------------------+--------------------------------+------+
-|Revision 4.84 |11 Aug 2014 |EM |
-+-------------------------------------+--------------------------------+------+
+Revision 4.84.2 02 Mar 2016 EM
+
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TABLE OF CONTENTS
1.1 Exim documentation
----------------------
-This edition of the Exim specification applies to version 4.84 of Exim.
+This edition of the Exim specification applies to version 4.84.2 of Exim.
Substantive changes from the 4.83 edition are marked in some renditions of the
document; this paragraph is so marked if the rendition is capable of showing a
change indicator.
Exim is distributed as a gzipped or bzipped tar file which, when unpacked,
creates a directory with the name of the current release (for example,
-exim-4.84) into which the following files are placed:
+exim-4.84.2) into which the following files are placed:
ACKNOWLEDGMENTS contains some acknowledgments
CHANGES contains a reference to where changes are documented
For the utility programs, old versions are renamed by adding the suffix .O to
their names. The Exim binary itself, however, is handled differently. It is
installed under a name that includes the version number and the compile number,
-for example exim-4.84-1. The script then arranges for a symbolic link called
+for example exim-4.84.2-1. The script then arranges for a symbolic link called
exim to point to the binary. If you are updating a previous version of Exim,
the script takes care to ensure that the name exim is never absent from the
directory (as seen by other processes).
authenticator_list, and a complete list of all drivers with their option
settings can be obtained by using routers, transports, or authenticators.
+ If environment is given as an argument, the set of environment variables is
+ output, line by line. Using the -n flag supresses the value of the
+ variables.
+
If invoked by an admin user, then macro, macro_list and macros are
available, similarly to the drivers. Because macros are sometimes used for
storing passwords, this option is restricted. The output format is one item
first file that exists is used. Failure to open an existing file stops Exim
from proceeding any further along the list, and an error is generated.
+ The file names need to be absolute names.
+
When this option is used by a caller other than root, and the list is
different from the compiled-in list, Exim gives up its root privilege
immediately, and runs with the real and effective uid and gid set to those
This option defines the ACL that is run when an SMTP VRFY command is received.
See chapter 42 for further details.
++---------------+---------+-----------------+--------------+
+|add_environment|Use: main|Type: string list|Default: empty|
++---------------+---------+-----------------+--------------+
+
+This option allows to set individual environment variables that the currently
+linked libraries and programs in child processes use. The default list is
+empty,
+
+------------+---------+------------------+--------------+
|admin_groups|Use: main|Type: string list*|Default: unset|
+------------+---------+------------------+--------------+
See ignore_fromline_hosts above.
++----------------+---------+-----------------+--------------+
+|keep_environment|Use: main|Type: string list|Default: unset|
++----------------+---------+-----------------+--------------+
+
+This option contains a string list of environment variables to keep. You have
+to trust these variables or you have to be sure that these variables do not
+impose any security risk. Keep in mind that during the startup phase Exim is
+running with an effective UID 0 in most installations. As the default value is
+an empty list, the default environment for using libraries, running embedded
+Perl code, or running external binaries is empty, and does not not even contain
+PATH or HOME.
+
+Actually the list is interpreted as a list of patterns (10.1), except that it
+is not expanded first.
+
+WARNING: Macro substitution is still done first, so having a macro FOO and
+having FOO_HOME in your keep_environment option may have unexpected results.
+You may work around this using a regular expression that does not match the
+macro name: ^[F]OO_HOME$.
+
+Current versions of Exim issue a warning during startupif you do not mention
+keep_environment or add_environment in your runtime configuration file.
+
+--------------+---------+----------+-----------+
|keep_malformed|Use: main|Type: time|Default: 4d|
+--------------+---------+----------+-----------+
sender_unqualified_hosts, or if the message was submitted locally (not using
TCP/IP), and the -bnq option was not set.
++---------------+---------+-----------------+--------------+
+|set_environment|Use: main|Type: string list|Default: empty|
++---------------+---------+-----------------+--------------+
+
+This option allows to set individual environment variables that the currently
+linked libraries and programs in child processes use. The default list is
+empty,
+
+---------------------+---------+-------------+-------------+
|smtp_accept_keepalive|Use: main|Type: boolean|Default: true|
+---------------------+---------+-------------+-------------+
HCoop / hcoop / debian / exim4.git / blobdiff