code.delx.au - gnu-emacs/blob - 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).
  32 ;;
  33 ;;(setq send-mail-function 'smtpmail-send-it)
  34 ;;(setq smtpmail-default-smtp-server "YOUR SMTP HOST")
  35 ;;(setq smtpmail-smtp-service "smtp")
  36 ;;(setq smtpmail-local-domain "YOUR DOMAIN NAME")
  37 ;;(setq smtpmail-debug-info t)
  38 ;;(load-library "smtpmail")
  39 ;;(setq smtpmail-code-conv-from nil)
  40 ;;(setq user-full-name "YOUR NAME HERE")
  41
  42 ;; To queue mail, set smtpmail-queue-mail to t and use
  43 ;; smtpmail-send-queued-mail to send.
  44
  45
  46 ;;; Code:
  47
  48 (require 'sendmail)
  49 (require 'time-stamp)
  50
  51 ;;;
  52 (defgroup smtpmail nil
  53   "SMTP protocol for sending mail."
  54   :group 'mail)
  55
  56
  57 (defcustom smtpmail-default-smtp-server nil
  58   "*Specify default SMTP server."
  59   :type '(choice (const nil) string)
  60   :group 'smtpmail)
  61
  62 (defcustom smtpmail-smtp-server
  63   (or (getenv "SMTPSERVER") smtpmail-default-smtp-server)
  64   "*The name of the host running SMTP server."
  65   :type '(choice (const nil) string)
  66   :group 'smtpmail)
  67
  68 (defcustom smtpmail-smtp-service 25
  69   "*SMTP service port number. smtp or 25 ."
  70   :type 'integer
  71   :group 'smtpmail)
  72
  73 (defcustom smtpmail-local-domain nil
  74   "*Local domain name without a host name.
  75 If the function (system-name) returns the full internet address,
  76 don't define this value."
  77   :type '(choice (const nil) string)
  78   :group 'smtpmail)
  79
  80 (defcustom smtpmail-debug-info nil
  81   "*smtpmail debug info printout. messages and process buffer."
  82   :type 'boolean
  83   :group 'smtpmail)
  84
  85 (defcustom smtpmail-code-conv-from nil ;; *junet*
  86   "*smtpmail code convert from this code to *internal*..for tiny-mime.."
  87   :type 'boolean
  88   :group 'smtpmail)
  89
  90 (defcustom smtpmail-queue-mail nil
  91   "*Specify if mail is queued (if t) or sent immediately (if nil).
  92 If queued, it is stored in the directory `smtpmail-queue-dir'
  93 and sent with `smtpmail-send-queued-mail'."
  94   :type 'boolean
  95   :group 'smtpmail)
  96
  97 (defcustom smtpmail-queue-dir "~/Mail/queued-mail/"
  98   "*Directory where `smtpmail.el' stores queued mail."
  99   :type 'directory
 100   :group 'smtpmail)
 101
 102 (defvar smtpmail-queue-index-file "index"
 103   "File name of queued mail index,
 104 This is relative to `smtpmail-queue-dir'.")
 105
 106 (defvar smtpmail-queue-index (concat smtpmail-queue-dir
 107                                      smtpmail-queue-index-file))
 108
 109 ;;;
 110 ;;;
 111 ;;;
 112
 113 (defun smtpmail-send-it ()
 114   (require 'mail-utils)
 115   (let ((errbuf (if mail-interactive
 116                     (generate-new-buffer " smtpmail errors")
 117                   0))
 118         (tembuf (generate-new-buffer " smtpmail temp"))
 119         (case-fold-search nil)
 120         delimline
 121         (mailbuf (current-buffer)))
 122     (unwind-protect
 123         (save-excursion
 124           (set-buffer tembuf)
 125           (erase-buffer)
 126           (insert-buffer-substring mailbuf)
 127           (goto-char (point-max))
 128           ;; require one newline at the end.
 129           (or (= (preceding-char) ?\n)
 130               (insert ?\n))
 131           ;; Change header-delimiter to be what sendmail expects.
 132           (mail-sendmail-undelimit-header)
 133           (setq delimline (point-marker))
 134 ;;        (sendmail-synch-aliases)
 135           (if mail-aliases
 136               (expand-mail-aliases (point-min) delimline))
 137           (goto-char (point-min))
 138           ;; ignore any blank lines in the header
 139           (while (and (re-search-forward "\n\n\n*" delimline t)
 140                       (< (point) delimline))
 141             (replace-match "\n"))
 142           (let ((case-fold-search t))
 143             ;; We used to process Resent-... headers here,
 144             ;; but it was not done properly, and the job
 145             ;; is done correctly in smtpmail-deduce-address-list.
 146             ;; Don't send out a blank subject line
 147             (goto-char (point-min))
 148             (if (re-search-forward "^Subject:\\([ \t]*\n\\)+\\b" delimline t)
 149                 (replace-match "")
 150               ;; This one matches a Subject just before the header delimiter.
 151               (if (and (re-search-forward "^Subject:\\([ \t]*\n\\)+" delimline t)
 152                        (= (match-end 0) delimline))
 153                   (replace-match "")))
 154             ;; Put the "From:" field in unless for some odd reason
 155             ;; they put one in themselves.
 156             (goto-char (point-min))
 157             (if (not (re-search-forward "^From:" delimline t))
 158                 (let* ((login user-mail-address)
 159                        (fullname (user-full-name)))
 160                   (cond ((eq mail-from-style 'angles)
 161                          (insert "From: " fullname)
 162                          (let ((fullname-start (+ (point-min) 6))
 163                                (fullname-end (point-marker)))
 164                            (goto-char fullname-start)
 165                            ;; Look for a character that cannot appear unquoted
 166                            ;; according to RFC 822.
 167                            (if (re-search-forward "[^- !#-'*+/-9=?A-Z^-~]"
 168                                                   fullname-end 1)
 169                                (progn
 170                                  ;; Quote fullname, escaping specials.
 171                                  (goto-char fullname-start)
 172                                  (insert "\"")
 173                                  (while (re-search-forward "[\"\\]"
 174                                                            fullname-end 1)
 175                                    (replace-match "\\\\\\&" t))
 176                                  (insert "\""))))
 177                          (insert " <" login ">\n"))
 178                         ((eq mail-from-style 'parens)
 179                          (insert "From: " login " (")
 180                          (let ((fullname-start (point)))
 181                            (insert fullname)
 182                            (let ((fullname-end (point-marker)))
 183                              (goto-char fullname-start)
 184                              ;; RFC 822 says \ and nonmatching parentheses
 185                              ;; must be escaped in comments.
 186                              ;; Escape every instance of ()\ ...
 187                              (while (re-search-forward "[()\\]" fullname-end 1)
 188                                (replace-match "\\\\\\&" t))
 189                              ;; ... then undo escaping of matching parentheses,
 190                              ;; including matching nested parentheses.
 191                              (goto-char fullname-start)
 192                              (while (re-search-forward
 193                                      "\\(\\=\\|[^\\]\\(\\\\\\\\\\)*\\)\\\\(\\(\\([^\\]\\|\\\\\\\\\\)*\\)\\\\)"
 194                                      fullname-end 1)
 195                                (replace-match "\\1(\\3)" t)
 196                                (goto-char fullname-start))))
 197                          (insert ")\n"))
 198                         ((null mail-from-style)
 199                          (insert "From: " login "\n")))))
 200             ;; Insert an extra newline if we need it to work around
 201             ;; Sun's bug that swallows newlines.
 202             (goto-char (1+ delimline))
 203             (if (eval mail-mailer-swallows-blank-line)
 204                 (newline))
 205             ;; Find and handle any FCC fields.
 206             (goto-char (point-min))
 207             (if (re-search-forward "^FCC:" delimline t)
 208                 (mail-do-fcc delimline))
 209             (if mail-interactive
 210                 (save-excursion
 211                   (set-buffer errbuf)
 212                   (erase-buffer))))
 213           ;;
 214           ;;
 215           ;;
 216           (setq smtpmail-address-buffer (generate-new-buffer "*smtp-mail*"))
 217           (setq smtpmail-recipient-address-list
 218                     (smtpmail-deduce-address-list tembuf (point-min) delimline))
 219           (kill-buffer smtpmail-address-buffer)
 220
 221           (smtpmail-do-bcc delimline)
 222           ; Send or queue
 223           (if (not smtpmail-queue-mail)
 224               (if (not (null smtpmail-recipient-address-list))
 225                   (if (not (smtpmail-via-smtp
 226                             smtpmail-recipient-address-list tembuf))
 227                       (error "Sending failed; SMTP protocol error"))
 228                 (error "Sending failed; no recipients"))
 229             (let* ((file-data (concat
 230                                smtpmail-queue-dir
 231                                (concat (time-stamp-yyyy-mm-dd)
 232                                        "_" (time-stamp-hh:mm:ss))))
 233                    (file-elisp (concat file-data ".el"))
 234                    (buffer-data (create-file-buffer file-data))
 235                    (buffer-elisp (create-file-buffer file-elisp))
 236                    (buffer-scratch "*queue-mail*"))
 237               (save-excursion
 238                 (set-buffer buffer-data)
 239                 (erase-buffer)
 240                 (insert-buffer tembuf)
 241                 (write-file file-data)
 242                 (set-buffer buffer-elisp)
 243                 (erase-buffer)
 244                 (insert (concat
 245                          "(setq smtpmail-recipient-address-list '"
 246                          (prin1-to-string smtpmail-recipient-address-list)
 247                          ")\n"))
 248                 (write-file file-elisp)
 249                 (set-buffer (generate-new-buffer buffer-scratch))
 250                 (insert (concat file-data "\n"))
 251                 (append-to-file (point-min)
 252                                 (point-max)
 253                                 smtpmail-queue-index)
 254                 )
 255               (kill-buffer buffer-scratch)
 256               (kill-buffer buffer-data)
 257               (kill-buffer buffer-elisp))))
 258       (kill-buffer tembuf)
 259       (if (bufferp errbuf)
 260           (kill-buffer errbuf)))))
 261
 262 (defun smtpmail-send-queued-mail ()
 263   "Send mail that was queued as a result of setting `smtpmail-queue-mail'."
 264   (interactive)
 265   ;;; Get index, get first mail, send it, get second mail, etc...
 266   (let ((buffer-index (find-file-noselect smtpmail-queue-index))
 267         (file-msg "")
 268         (tembuf nil))
 269     (save-excursion
 270       (set-buffer buffer-index)
 271       (beginning-of-buffer)
 272       (while (not (eobp))
 273         (setq file-msg (buffer-substring (point) (save-excursion
 274                                                    (end-of-line)
 275                                                    (point))))
 276         (load file-msg)
 277         (setq tembuf (find-file-noselect file-msg))
 278         (if (not (null smtpmail-recipient-address-list))
 279             (if (not (smtpmail-via-smtp smtpmail-recipient-address-list
 280                                         tembuf))
 281                 (error "Sending failed; SMTP protocol error"))
 282           (error "Sending failed; no recipients"))
 283         (delete-file file-msg)
 284         (delete-file (concat file-msg ".el"))
 285         (kill-buffer tembuf)
 286         (kill-line 1))
 287       (set-buffer buffer-index)
 288       (save-buffer smtpmail-queue-index)
 289       (kill-buffer buffer-index)
 290       )))
 291
 292 ;(defun smtpmail-via-smtp (host,port,sender,destination,smtpmail-text-buffer)
 293
 294 (defun smtpmail-fqdn ()
 295   (if smtpmail-local-domain
 296       (concat (system-name) "." smtpmail-local-domain)
 297     (system-name)))
 298
 299 (defun smtpmail-via-smtp (recipient smtpmail-text-buffer)
 300   (let ((process nil)
 301         (host smtpmail-smtp-server)
 302         (port smtpmail-smtp-service)
 303         response-code
 304         greeting
 305         process-buffer
 306         (supported-extensions '()))
 307     (unwind-protect
 308         (catch 'done
 309           ;; get or create the trace buffer
 310           (setq process-buffer
 311                 (get-buffer-create (format "*trace of SMTP session to %s*" host)))
 312
 313           ;; clear the trace buffer of old output
 314           (save-excursion
 315             (set-buffer process-buffer)
 316             (erase-buffer))
 317
 318           ;; open the connection to the server
 319           (setq process (open-network-stream "SMTP" process-buffer host port))
 320           (and (null process) (throw 'done nil))
 321
 322           ;; set the send-filter
 323           (set-process-filter process 'smtpmail-process-filter)
 324
 325           (save-excursion
 326             (set-buffer process-buffer)
 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 (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