lisp/mail/smtpmail.el

   1 ;;; smtpmail.el --- simple SMTP protocol (RFC 821) for sending mail
   2
   3 ;; Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   4
   5 ;; Author: Tomoji Kagatani <kagatani@rbc.ncl.omron.co.jp>
   6 ;; Maintainer: Brian D. Carlstrom <bdc@ai.mit.edu>
   7 ;; ESMTP support: Simon Leinen <simon@switch.ch>
   8 ;; Keywords: mail
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; Send Mail to smtp host from smtpmail temp buffer.
  30
  31 ;; Please add these lines in your .emacs(_emacs) or use customize.
  32 ;;
  33 ;;(setq send-mail-function 'smtpmail-send-it) ; if you use `mail'
  34 ;;(setq message-send-mail-function 'smtpmail-send-it) ; if you use `message'
  35 ;;(setq smtpmail-default-smtp-server "YOUR SMTP HOST")
  36 ;;(setq smtpmail-local-domain "YOUR DOMAIN NAME")
  37 ;;(setq smtpmail-debug-info t) ; only to debug problems
  38
  39 ;; To queue mail, set smtpmail-queue-mail to t and use
  40 ;; smtpmail-send-queued-mail to send.
  41
  42
  43 ;;; Code:
  44
  45 (require 'sendmail)
  46 (require 'time-stamp)
  47
  48 ;;;
  49 (defgroup smtpmail nil
  50   "SMTP protocol for sending mail."
  51   :group 'mail)
  52
  53
  54 (defcustom smtpmail-default-smtp-server nil
  55   "*Specify default SMTP server."
  56   :type '(choice (const nil) string)
  57   :group 'smtpmail)
  58
  59 (defcustom smtpmail-smtp-server
  60   (or (getenv "SMTPSERVER") smtpmail-default-smtp-server)
  61   "*The name of the host running SMTP server."
  62   :type '(choice (const nil) string)
  63   :group 'smtpmail)
  64
  65 (defcustom smtpmail-smtp-service 25
  66   "*SMTP service port number. smtp or 25 ."
  67   :type 'integer
  68   :group 'smtpmail)
  69
  70 (defcustom smtpmail-local-domain nil
  71   "*Local domain name without a host name.
  72 If the function (system-name) returns the full internet address,
  73 don't define this value."
  74   :type '(choice (const nil) string)
  75   :group 'smtpmail)
  76
  77 (defcustom smtpmail-debug-info nil
  78   "*smtpmail debug info printout. messages and process buffer."
  79   :type 'boolean
  80   :group 'smtpmail)
  81
  82 (defcustom smtpmail-code-conv-from nil ;; *junet*
  83   "*smtpmail code convert from this code to *internal*..for tiny-mime.."
  84   :type 'boolean
  85   :group 'smtpmail)
  86
  87 (defcustom smtpmail-queue-mail nil
  88   "*Specify if mail is queued (if t) or sent immediately (if nil).
  89 If queued, it is stored in the directory `smtpmail-queue-dir'
  90 and sent with `smtpmail-send-queued-mail'."
  91   :type 'boolean
  92   :group 'smtpmail)
  93
  94 (defcustom smtpmail-queue-dir "~/Mail/queued-mail/"
  95   "*Directory where `smtpmail.el' stores queued mail."
  96   :type 'directory
  97   :group 'smtpmail)
  98
  99 (defvar smtpmail-queue-index-file "index"
 100   "File name of queued mail index,
 101 This is relative to `smtpmail-queue-dir'.")
 102
 103 (defvar smtpmail-queue-index (concat smtpmail-queue-dir
 104                                      smtpmail-queue-index-file))
 105
 106 ;;;
 107 ;;;
 108 ;;;
 109
 110 ;;;###autoload
 111 (defun smtpmail-send-it ()
 112   (require 'mail-utils)
 113   (let ((errbuf (if mail-interactive
 114                     (generate-new-buffer " smtpmail errors")
 115                   0))
 116         (tembuf (generate-new-buffer " smtpmail temp"))
 117         (case-fold-search nil)
 118         delimline
 119         (mailbuf (current-buffer)))
 120     (unwind-protect
 121         (save-excursion
 122           (set-buffer tembuf)
 123           (erase-buffer)
 124           (insert-buffer-substring mailbuf)
 125           (goto-char (point-max))
 126           ;; require one newline at the end.
 127           (or (= (preceding-char) ?\n)
 128               (insert ?\n))
 129           ;; Change header-delimiter to be what sendmail expects.
 130           (mail-sendmail-undelimit-header)
 131           (setq delimline (point-marker))
 132 ;;        (sendmail-synch-aliases)
 133           (if mail-aliases
 134               (expand-mail-aliases (point-min) delimline))
 135           (goto-char (point-min))
 136           ;; ignore any blank lines in the header
 137           (while (and (re-search-forward "\n\n\n*" delimline t)
 138                       (< (point) delimline))
 139             (replace-match "\n"))
 140           (let ((case-fold-search t))
 141             ;; We used to process Resent-... headers here,
 142             ;; but it was not done properly, and the job
 143             ;; is done correctly in smtpmail-deduce-address-list.
 144             ;; Don't send out a blank subject line
 145             (goto-char (point-min))
 146             (if (re-search-forward "^Subject:\\([ \t]*\n\\)+\\b" delimline t)
 147                 (replace-match "")
 148               ;; This one matches a Subject just before the header delimiter.
 149               (if (and (re-search-forward "^Subject:\\([ \t]*\n\\)+" delimline t)
 150                        (= (match-end 0) delimline))
 151                   (replace-match "")))
 152             ;; Put the "From:" field in unless for some odd reason
 153             ;; they put one in themselves.
 154             (goto-char (point-min))
 155             (if (not (re-search-forward "^From:" delimline t))
 156                 (let* ((login user-mail-address)
 157                        (fullname (user-full-name)))
 158                   (cond ((eq mail-from-style 'angles)
 159                          (insert "From: " fullname)
 160                          (let ((fullname-start (+ (point-min) 6))
 161                                (fullname-end (point-marker)))
 162                            (goto-char fullname-start)
 163                            ;; Look for a character that cannot appear unquoted
 164                            ;; according to RFC 822.
 165                            (if (re-search-forward "[^- !#-'*+/-9=?A-Z^-~]"
 166                                                   fullname-end 1)
 167                                (progn
 168                                  ;; Quote fullname, escaping specials.
 169                                  (goto-char fullname-start)
 170                                  (insert "\"")
 171                                  (while (re-search-forward "[\"\\]"
 172                                                            fullname-end 1)
 173                                    (replace-match "\\\\\\&" t))
 174                                  (insert "\""))))
 175                          (insert " <" login ">\n"))
 176                         ((eq mail-from-style 'parens)
 177                          (insert "From: " login " (")
 178                          (let ((fullname-start (point)))
 179                            (insert fullname)
 180                            (let ((fullname-end (point-marker)))
 181                              (goto-char fullname-start)
 182                              ;; RFC 822 says \ and nonmatching parentheses
 183                              ;; must be escaped in comments.
 184                              ;; Escape every instance of ()\ ...
 185                              (while (re-search-forward "[()\\]" fullname-end 1)
 186                                (replace-match "\\\\\\&" t))
 187                              ;; ... then undo escaping of matching parentheses,
 188                              ;; including matching nested parentheses.
 189                              (goto-char fullname-start)
 190                              (while (re-search-forward
 191                                      "\\(\\=\\|[^\\]\\(\\\\\\\\\\)*\\)\\\\(\\(\\([^\\]\\|\\\\\\\\\\)*\\)\\\\)"
 192                                      fullname-end 1)
 193                                (replace-match "\\1(\\3)" t)
 194                                (goto-char fullname-start))))
 195                          (insert ")\n"))
 196                         ((null mail-from-style)
 197                          (insert "From: " login "\n")))))
 198             ;; Insert an extra newline if we need it to work around
 199             ;; Sun's bug that swallows newlines.
 200             (goto-char (1+ delimline))
 201             (if (eval mail-mailer-swallows-blank-line)
 202                 (newline))
 203             ;; Find and handle any FCC fields.
 204             (goto-char (point-min))
 205             (if (re-search-forward "^FCC:" delimline t)
 206                 (mail-do-fcc delimline))
 207             (if mail-interactive
 208                 (save-excursion
 209                   (set-buffer errbuf)
 210                   (erase-buffer))))
 211           ;;
 212           ;;
 213           ;;
 214           (setq smtpmail-address-buffer (generate-new-buffer "*smtp-mail*"))
 215           (setq smtpmail-recipient-address-list
 216                     (smtpmail-deduce-address-list tembuf (point-min) delimline))
 217           (kill-buffer smtpmail-address-buffer)
 218
 219           (smtpmail-do-bcc delimline)
 220           ; Send or queue
 221           (if (not smtpmail-queue-mail)
 222               (if (not (null smtpmail-recipient-address-list))
 223                   (if (not (smtpmail-via-smtp
 224                             smtpmail-recipient-address-list tembuf))
 225                       (error "Sending failed; SMTP protocol error"))
 226                 (error "Sending failed; no recipients"))
 227             (let* ((file-data (concat
 228                                smtpmail-queue-dir
 229                                (concat (time-stamp-yyyy-mm-dd)
 230                                        "_" (time-stamp-hh:mm:ss))))
 231                    (file-elisp (concat file-data ".el"))
 232                    (buffer-data (create-file-buffer file-data))
 233                    (buffer-elisp (create-file-buffer file-elisp))
 234                    (buffer-scratch "*queue-mail*"))
 235               (save-excursion
 236                 (set-buffer buffer-data)
 237                 (erase-buffer)
 238                 (insert-buffer tembuf)
 239                 (write-file file-data)
 240                 (set-buffer buffer-elisp)
 241                 (erase-buffer)
 242                 (insert (concat
 243                          "(setq smtpmail-recipient-address-list '"
 244                          (prin1-to-string smtpmail-recipient-address-list)
 245                          ")\n"))
 246                 (write-file file-elisp)
 247                 (set-buffer (generate-new-buffer buffer-scratch))
 248                 (insert (concat file-data "\n"))
 249                 (append-to-file (point-min)
 250                                 (point-max)
 251                                 smtpmail-queue-index)
 252                 )
 253               (kill-buffer buffer-scratch)
 254               (kill-buffer buffer-data)
 255               (kill-buffer buffer-elisp))))
 256       (kill-buffer tembuf)
 257       (if (bufferp errbuf)
 258           (kill-buffer errbuf)))))
 259
 260 (defun smtpmail-send-queued-mail ()
 261   "Send mail that was queued as a result of setting `smtpmail-queue-mail'."
 262   (interactive)
 263   ;;; Get index, get first mail, send it, get second mail, etc...
 264   (let ((buffer-index (find-file-noselect smtpmail-queue-index))
 265         (file-msg "")
 266         (tembuf nil))
 267     (save-excursion
 268       (set-buffer buffer-index)
 269       (beginning-of-buffer)
 270       (while (not (eobp))
 271         (setq file-msg (buffer-substring (point) (save-excursion
 272                                                    (end-of-line)
 273                                                    (point))))
 274         (load file-msg)
 275         (setq tembuf (find-file-noselect file-msg))
 276         (if (not (null smtpmail-recipient-address-list))
 277             (if (not (smtpmail-via-smtp smtpmail-recipient-address-list
 278                                         tembuf))
 279                 (error "Sending failed; SMTP protocol error"))
 280           (error "Sending failed; no recipients"))
 281         (delete-file file-msg)
 282         (delete-file (concat file-msg ".el"))
 283         (kill-buffer tembuf)
 284         (kill-line 1))
 285       (set-buffer buffer-index)
 286       (save-buffer smtpmail-queue-index)
 287       (kill-buffer buffer-index)
 288       )))
 289
 290 ;(defun smtpmail-via-smtp (host,port,sender,destination,smtpmail-text-buffer)
 291
 292 (defun smtpmail-fqdn ()
 293   (if smtpmail-local-domain
 294       (concat (system-name) "." smtpmail-local-domain)
 295     (system-name)))
 296
 297 (defun smtpmail-via-smtp (recipient smtpmail-text-buffer)
 298   (let ((process nil)
 299         (host (or smtpmail-smtp-server
 300                   (error "`smtpmail-smtp-server' not defined")))
 301         (port smtpmail-smtp-service)
 302         response-code
 303         greeting
 304         process-buffer
 305         (supported-extensions '()))
 306     (unwind-protect
 307         (catch 'done
 308           ;; get or create the trace buffer
 309           (setq process-buffer
 310                 (get-buffer-create (format "*trace of SMTP session to %s*" host)))
 311
 312           ;; clear the trace buffer of old output
 313           (save-excursion
 314             (set-buffer process-buffer)
 315             (erase-buffer))
 316
 317           ;; open the connection to the server
 318           (setq process (open-network-stream "SMTP" process-buffer host port))
 319           (and (null process) (throw 'done nil))
 320
 321           ;; set the send-filter
 322           (set-process-filter process 'smtpmail-process-filter)
 323
 324           (save-excursion
 325             (set-buffer process-buffer)
 326             (set-buffer-process-coding-system 'raw-text-unix 'raw-text-unix)
 327             (make-local-variable 'smtpmail-read-point)
 328             (setq smtpmail-read-point (point-min))
 329
 330
 331             (if (or (null (car (setq greeting (smtpmail-read-response process))))
 332                     (not (integerp (car greeting)))
 333                     (>= (car greeting) 400))
 334                 (throw 'done nil)
 335               )
 336
 337             ;; EHLO
 338             (smtpmail-send-command process (format "EHLO %s" (smtpmail-fqdn)))
 339
 340             (if (or (null (car (setq response-code (smtpmail-read-response process))))
 341                     (not (integerp (car response-code)))
 342                     (>= (car response-code) 400))
 343                 (progn
 344                   ;; HELO
 345                   (smtpmail-send-command process (format "HELO %s" (smtpmail-fqdn)))
 346
 347                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 348                           (not (integerp (car response-code)))
 349                           (>= (car response-code) 400))
 350                       (throw 'done nil)))
 351               (let ((extension-lines (cdr (cdr response-code))))
 352                 (while extension-lines
 353                   (let ((name (intern (downcase (car (split-string (substring (car extension-lines) 4) "[ ]"))))))
 354                     (and name
 355                          (cond ((memq name '(verb xvrb 8bitmime onex xone
 356                                                   expn size dsn etrn
 357                                                   help xusr))
 358                                 (setq supported-extensions
 359                                       (cons name supported-extensions)))
 360                                (t (message "unknown extension %s"
 361                                            name)))))
 362                   (setq extension-lines (cdr extension-lines)))))
 363
 364             (if (or (member 'onex supported-extensions)
 365                     (member 'xone supported-extensions))
 366                 (progn
 367                   (smtpmail-send-command process (format "ONEX"))
 368                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 369                           (not (integerp (car response-code)))
 370                           (>= (car response-code) 400))
 371                       (throw 'done nil))))
 372
 373             (if (and smtpmail-debug-info
 374                      (or (member 'verb supported-extensions)
 375                          (member 'xvrb supported-extensions)))
 376                 (progn
 377                   (smtpmail-send-command process (format "VERB"))
 378                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 379                           (not (integerp (car response-code)))
 380                           (>= (car response-code) 400))
 381                       (throw 'done nil))))
 382
 383             (if (member 'xusr supported-extensions)
 384                 (progn
 385                   (smtpmail-send-command process (format "XUSR"))
 386                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 387                           (not (integerp (car response-code)))
 388                           (>= (car response-code) 400))
 389                       (throw 'done nil))))
 390
 391             ;; MAIL FROM: <sender>
 392             (let ((size-part
 393                    (if (member 'size supported-extensions)
 394                        (format " SIZE=%d"
 395                                (save-excursion
 396                                  (set-buffer smtpmail-text-buffer)
 397                                  ;; size estimate:
 398                                  (+ (- (point-max) (point-min))
 399                                     ;; Add one byte for each change-of-line
 400                                     ;; because or CR-LF representation:
 401                                     (count-lines (point-min) (point-max))
 402                                     ;; For some reason, an empty line is
 403                                     ;; added to the message.  Maybe this
 404                                     ;; is a bug, but it can't hurt to add
 405                                     ;; those two bytes anyway:
 406                                     2)))
 407                      ""))
 408                   (body-part
 409                    (if (member '8bitmime supported-extensions)
 410                        ;; FIXME:
 411                        ;; Code should be added here that transforms
 412                        ;; the contents of the message buffer into
 413                        ;; something the receiving SMTP can handle.
 414                        ;; For a receiver that supports 8BITMIME, this
 415                        ;; may mean converting BINARY to BASE64, or
 416                        ;; adding Content-Transfer-Encoding and the
 417                        ;; other MIME headers.  The code should also
 418                        ;; return an indication of what encoding the
 419                        ;; message buffer is now, i.e. ASCII or
 420                        ;; 8BITMIME.
 421                        (if nil
 422                            " BODY=8BITMIME"
 423                          "")
 424                      "")))
 425 ;             (smtpmail-send-command process (format "MAIL FROM:%s@%s" (user-login-name) (smtpmail-fqdn)))
 426               (smtpmail-send-command process (format "MAIL FROM: <%s>%s%s"
 427                                                      user-mail-address
 428                                                      size-part
 429                                                      body-part))
 430
 431               (if (or (null (car (setq response-code (smtpmail-read-response process))))
 432                       (not (integerp (car response-code)))
 433                       (>= (car response-code) 400))
 434                   (throw 'done nil)
 435                 ))
 436
 437             ;; RCPT TO: <recipient>
 438             (let ((n 0))
 439               (while (not (null (nth n recipient)))
 440                 (smtpmail-send-command process (format "RCPT TO: <%s>" (nth n recipient)))
 441                 (setq n (1+ n))
 442
 443                 (setq response-code (smtpmail-read-response process))
 444                 (if (or (null (car response-code))
 445                         (not (integerp (car response-code)))
 446                         (>= (car response-code) 400))
 447                     (throw 'done nil)
 448                   )
 449                 ))
 450
 451             ;; DATA
 452             (smtpmail-send-command process "DATA")
 453
 454             (if (or (null (car (setq response-code (smtpmail-read-response process))))
 455                     (not (integerp (car response-code)))
 456                     (>= (car response-code) 400))
 457                 (throw 'done nil)
 458               )
 459
 460             ;; Mail contents
 461             (smtpmail-send-data process smtpmail-text-buffer)
 462
 463             ;;DATA end "."
 464             (smtpmail-send-command process ".")
 465
 466             (if (or (null (car (setq response-code (smtpmail-read-response process))))
 467                     (not (integerp (car response-code)))
 468                     (>= (car response-code) 400))
 469                 (throw 'done nil)
 470               )
 471
 472             ;;QUIT
 473 ;           (smtpmail-send-command process "QUIT")
 474 ;           (and (null (car (smtpmail-read-response process)))
 475 ;                (throw 'done nil))
 476             t ))
 477       (if process
 478           (save-excursion
 479             (set-buffer (process-buffer process))
 480             (smtpmail-send-command process "QUIT")
 481             (smtpmail-read-response process)
 482
 483 ;           (if (or (null (car (setq response-code (smtpmail-read-response process))))
 484 ;                   (not (integerp (car response-code)))
 485 ;                   (>= (car response-code) 400))
 486 ;               (throw 'done nil)
 487 ;             )
 488             (delete-process process))))))
 489
 490
 491 (defun smtpmail-process-filter (process output)
 492   (save-excursion
 493     (set-buffer (process-buffer process))
 494     (goto-char (point-max))
 495     (insert output)))
 496
 497 (defun smtpmail-read-response (process)
 498   (let ((case-fold-search nil)
 499         (response-strings nil)
 500         (response-continue t)
 501         (return-value '(nil ()))
 502         match-end)
 503
 504     (while response-continue
 505       (goto-char smtpmail-read-point)
 506       (while (not (search-forward "\r\n" nil t))
 507         (accept-process-output process)
 508         (goto-char smtpmail-read-point))
 509
 510       (setq match-end (point))
 511       (setq response-strings
 512             (cons (buffer-substring smtpmail-read-point (- match-end 2))
 513                   response-strings))
 514
 515       (goto-char smtpmail-read-point)
 516       (if (looking-at "[0-9]+ ")
 517           (let ((begin (match-beginning 0))
 518                 (end (match-end 0)))
 519             (if smtpmail-debug-info
 520                 (message "%s" (car response-strings)))
 521
 522             (setq smtpmail-read-point match-end)
 523
 524             ;; ignore lines that start with "0"
 525             (if (looking-at "0[0-9]+ ")
 526                 nil
 527               (setq response-continue nil)
 528               (setq return-value
 529                     (cons (string-to-int
 530                            (buffer-substring begin end))
 531                           (nreverse response-strings)))))
 532
 533         (if (looking-at "[0-9]+-")
 534             (progn (if smtpmail-debug-info
 535                      (message "%s" (car response-strings)))
 536                    (setq smtpmail-read-point match-end)
 537                    (setq response-continue t))
 538           (progn
 539             (setq smtpmail-read-point match-end)
 540             (setq response-continue nil)
 541             (setq return-value
 542                   (cons nil (nreverse response-strings)))
 543             )
 544           )))
 545     (setq smtpmail-read-point match-end)
 546     return-value))
 547
 548
 549 (defun smtpmail-send-command (process command)
 550   (goto-char (point-max))
 551   (if (= (aref command 0) ?P)
 552       (insert "PASS <omitted>\r\n")
 553     (insert command "\r\n"))
 554   (setq smtpmail-read-point (point))
 555   (process-send-string process command)
 556   (process-send-string process "\r\n"))
 557
 558 (defun smtpmail-send-data-1 (process data)
 559   (goto-char (point-max))
 560
 561   (if (not (null smtpmail-code-conv-from))
 562       (setq data (code-convert-string data smtpmail-code-conv-from *internal*)))
 563
 564   (if smtpmail-debug-info
 565       (insert data "\r\n"))
 566
 567   (setq smtpmail-read-point (point))
 568   ;; Escape "." at start of a line
 569   (if (eq (string-to-char data) ?.)
 570       (process-send-string process "."))
 571   (process-send-string process data)
 572   (process-send-string process "\r\n")
 573   )
 574
 575 (defun smtpmail-send-data (process buffer)
 576   (let
 577       ((data-continue t)
 578        (sending-data nil)
 579        this-line
 580        this-line-end)
 581
 582     (save-excursion
 583       (set-buffer buffer)
 584       (goto-char (point-min)))
 585
 586     (while data-continue
 587       (save-excursion
 588         (set-buffer buffer)
 589         (beginning-of-line)
 590         (setq this-line (point))
 591         (end-of-line)
 592         (setq this-line-end (point))
 593         (setq sending-data nil)
 594         (setq sending-data (buffer-substring this-line this-line-end))
 595         (if (/= (forward-line 1) 0)
 596             (setq data-continue nil)))
 597
 598       (smtpmail-send-data-1 process sending-data)
 599       )
 600     )
 601   )
 602
 603
 604 (defun smtpmail-deduce-address-list (smtpmail-text-buffer header-start header-end)
 605   "Get address list suitable for smtp RCPT TO: <address>."
 606   (require 'mail-utils)  ;; pick up mail-strip-quoted-names
 607   (let
 608       ((case-fold-search t)
 609        (simple-address-list "")
 610        this-line
 611        this-line-end
 612        addr-regexp)
 613
 614     (unwind-protect
 615         (save-excursion
 616           ;;
 617           (set-buffer smtpmail-address-buffer) (erase-buffer)
 618           (insert-buffer-substring smtpmail-text-buffer header-start header-end)
 619           (goto-char (point-min))
 620           ;; RESENT-* fields should stop processing of regular fields.
 621           (save-excursion
 622             (if (re-search-forward "^Resent-\\(to\\|cc\\|bcc\\):" header-end t)
 623                 (setq addr-regexp "^Resent-\\(to\\|cc\\|bcc\\):")
 624               (setq addr-regexp  "^\\(To:\\|Cc:\\|Bcc:\\)")))
 625
 626           (while (re-search-forward addr-regexp header-end t)
 627             (replace-match "")
 628             (setq this-line (match-beginning 0))
 629             (forward-line 1)
 630             ;; get any continuation lines
 631             (while (and (looking-at "^[ \t]+") (< (point) header-end))
 632               (forward-line 1))
 633             (setq this-line-end (point-marker))
 634             (setq simple-address-list
 635                   (concat simple-address-list " "
 636                           (mail-strip-quoted-names (buffer-substring this-line this-line-end))))
 637             )
 638           (erase-buffer)
 639           (insert-string " ")
 640           (insert-string simple-address-list)
 641           (insert-string "\n")
 642           (subst-char-in-region (point-min) (point-max) 10 ?  t);; newline --> blank
 643           (subst-char-in-region (point-min) (point-max) ?, ?  t);; comma   --> blank
 644           (subst-char-in-region (point-min) (point-max)  9 ?  t);; tab     --> blank
 645
 646           (goto-char (point-min))
 647           ;; tidyness in case hook is not robust when it looks at this
 648           (while (re-search-forward "[ \t]+" header-end t) (replace-match " "))
 649
 650           (goto-char (point-min))
 651           (let (recipient-address-list)
 652             (while (re-search-forward " \\([^ ]+\\) " (point-max) t)
 653               (backward-char 1)
 654               (setq recipient-address-list (cons (buffer-substring (match-beginning 1) (match-end 1))
 655                                                  recipient-address-list))
 656               )
 657             (setq smtpmail-recipient-address-list recipient-address-list))
 658
 659           )
 660       )
 661     )
 662   )
 663
 664
 665 (defun smtpmail-do-bcc (header-end)
 666   "Delete [Resent-]BCC: and their continuation lines from the header area.
 667 There may be multiple BCC: lines, and each may have arbitrarily
 668 many continuation lines."
 669   (let ((case-fold-search t))
 670         (save-excursion (goto-char (point-min))
 671           ;; iterate over all BCC: lines
 672           (while (re-search-forward "^\(RESENT-\)?BCC:" header-end t)
 673                 (delete-region (match-beginning 0) (progn (forward-line 1) (point)))
 674                 ;; get rid of any continuation lines
 675                 (while (and (looking-at "^[ \t].*\n") (< (point) header-end))
 676                   (replace-match ""))
 677                 )
 678           ) ;; save-excursion
 679         ) ;; let
 680   )
 681
 682
 683
 684 (provide 'smtpmail)
 685
 686 ;;; smtpmail.el ends here