lisp/mail/smtpmail.el

   1 ;;; smtpmail.el --- simple SMTP protocol (RFC 821) for sending mail
   2
   3 ;; Copyright (C) 1995, 1996, 2001, 2002, 2003, 2004
   4 ;;   Free Software Foundation, Inc.
   5
   6 ;; Author: Tomoji Kagatani <kagatani@rbc.ncl.omron.co.jp>
   7 ;; Maintainer: Simon Josefsson <simon@josefsson.org>
   8 ;; w32 Maintainer: Brian D. Carlstrom <bdc@ai.mit.edu>
   9 ;; ESMTP support: Simon Leinen <simon@switch.ch>
  10 ;; Hacked by Mike Taylor, 11th October 1999 to add support for
  11 ;; automatically appending a domain to RCPT TO: addresses.
  12 ;; AUTH=LOGIN support: Stephen Cranefield <scranefield@infoscience.otago.ac.nz>
  13 ;; Keywords: mail
  14
  15 ;; This file is part of GNU Emacs.
  16
  17 ;; GNU Emacs is free software; you can redistribute it and/or modify
  18 ;; it under the terms of the GNU General Public License as published by
  19 ;; the Free Software Foundation; either version 2, or (at your option)
  20 ;; any later version.
  21
  22 ;; GNU Emacs is distributed in the hope that it will be useful,
  23 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 ;; GNU General Public License for more details.
  26
  27 ;; You should have received a copy of the GNU General Public License
  28 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  29 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  30 ;; Boston, MA 02111-1307, USA.
  31
  32 ;;; Commentary:
  33
  34 ;; Send Mail to smtp host from smtpmail temp buffer.
  35
  36 ;; Please add these lines in your .emacs(_emacs) or use customize.
  37 ;;
  38 ;;(setq send-mail-function 'smtpmail-send-it) ; if you use `mail'
  39 ;;(setq message-send-mail-function 'smtpmail-send-it) ; if you use message/Gnus
  40 ;;(setq smtpmail-default-smtp-server "YOUR SMTP HOST")
  41 ;;(setq smtpmail-local-domain "YOUR DOMAIN NAME")
  42 ;;(setq smtpmail-sendto-domain "YOUR DOMAIN NAME")
  43 ;;(setq smtpmail-debug-info t) ; only to debug problems
  44 ;;(setq smtpmail-auth-credentials  ; or use ~/.authinfo
  45 ;;      '(("YOUR SMTP HOST" 25 "username" "password")))
  46 ;;(setq smtpmail-starttls-credentials
  47 ;;      '(("YOUR SMTP HOST" 25 "~/.my_smtp_tls.key" "~/.my_smtp_tls.cert")))
  48 ;; Where the 25 equals the value of `smtpmail-smtp-service', it can be an
  49 ;; integer or a string, just as long as they match (eq).
  50
  51 ;; To queue mail, set smtpmail-queue-mail to t and use
  52 ;; smtpmail-send-queued-mail to send.
  53
  54 ;; Modified by Stephen Cranefield <scranefield@infoscience.otago.ac.nz>,
  55 ;; 22/6/99, to support SMTP Authentication by the AUTH=LOGIN mechanism.
  56 ;; See http://help.netscape.com/products/server/messaging/3x/info/smtpauth.html
  57 ;; Rewritten by Simon Josefsson to use same credential variable as AUTH
  58 ;; support below.
  59
  60 ;; Modified by Simon Josefsson <jas@pdc.kth.se>, 22/2/99, to support SMTP
  61 ;; Authentication by the AUTH mechanism.
  62 ;; See http://www.ietf.org/rfc/rfc2554.txt
  63
  64 ;; Modified by Simon Josefsson <simon@josefsson.org>, 2000-10-07, to support
  65 ;; STARTTLS.  Requires external program
  66 ;; ftp://ftp.opaopa.org/pub/elisp/starttls-*.tar.gz.
  67 ;; See http://www.ietf.org/rfc/rfc2246.txt, http://www.ietf.org/rfc/rfc2487.txt
  68
  69 ;;; Code:
  70
  71 (require 'sendmail)
  72 (autoload 'starttls-open-stream "starttls")
  73 (autoload 'starttls-negotiate "starttls")
  74 (autoload 'mail-strip-quoted-names "mail-utils")
  75 (autoload 'message-make-date "message")
  76 (autoload 'message-make-message-id "message")
  77 (autoload 'rfc2104-hash "rfc2104")
  78 (autoload 'netrc-parse "netrc")
  79 (autoload 'netrc-machine "netrc")
  80 (autoload 'netrc-get "netrc")
  81
  82 ;;;
  83 (defgroup smtpmail nil
  84   "SMTP protocol for sending mail."
  85   :group 'mail)
  86
  87
  88 (defcustom smtpmail-default-smtp-server nil
  89   "*Specify default SMTP server.
  90 This only has effect if you specify it before loading the smtpmail library."
  91   :type '(choice (const nil) string)
  92   :group 'smtpmail)
  93
  94 (defcustom smtpmail-smtp-server
  95   (or (getenv "SMTPSERVER") smtpmail-default-smtp-server)
  96   "*The name of the host running SMTP server."
  97   :type '(choice (const nil) string)
  98   :group 'smtpmail)
  99
 100 (defcustom smtpmail-smtp-service 25
 101   "*SMTP service port number.
 102 The default value would be \"smtp\" or 25 ."
 103   :type '(choice (integer :tag "Port") (string :tag "Service"))
 104   :group 'smtpmail)
 105
 106 (defcustom smtpmail-local-domain nil
 107   "*Local domain name without a host name.
 108 If the function (system-name) returns the full internet address,
 109 don't define this value."
 110   :type '(choice (const nil) string)
 111   :group 'smtpmail)
 112
 113 (defcustom smtpmail-sendto-domain nil
 114   "*Local domain name without a host name.
 115 This is appended (with an @-sign) to any specified recipients which do
 116 not include an @-sign, so that each RCPT TO address is fully qualified.
 117 \(Some configurations of sendmail require this.)
 118
 119 Don't bother to set this unless you have get an error like:
 120         Sending failed; SMTP protocol error
 121 when sending mail, and the *trace of SMTP session to <somewhere>*
 122 buffer includes an exchange like:
 123         RCPT TO: <someone>
 124         501 <someone>: recipient address must contain a domain
 125 "
 126   :type '(choice (const nil) string)
 127   :group 'smtpmail)
 128
 129 (defcustom smtpmail-debug-info nil
 130   "Whether to print info in buffer *trace of SMTP session to <somewhere>*.
 131 See also `smtpmail-debug-verb' which determines if the SMTP protocol should
 132 be verbose as well."
 133   :type 'boolean
 134   :group 'smtpmail)
 135
 136 (defcustom smtpmail-debug-verb nil
 137   "Whether this library sends the SMTP VERB command or not.
 138 The commands enables verbose information from the SMTP server."
 139   :type 'boolean
 140   :group 'smtpmail)
 141
 142 (defcustom smtpmail-code-conv-from nil ;; *junet*
 143   "*smtpmail code convert from this code to *internal*..for tiny-mime.."
 144   :type 'boolean
 145   :group 'smtpmail)
 146
 147 (defcustom smtpmail-queue-mail nil
 148   "*Specify if mail is queued (if t) or sent immediately (if nil).
 149 If queued, it is stored in the directory `smtpmail-queue-dir'
 150 and sent with `smtpmail-send-queued-mail'."
 151   :type 'boolean
 152   :group 'smtpmail)
 153
 154 (defcustom smtpmail-queue-dir "~/Mail/queued-mail/"
 155   "*Directory where `smtpmail.el' stores queued mail."
 156   :type 'directory
 157   :group 'smtpmail)
 158
 159 (defcustom smtpmail-auth-credentials "~/.authinfo"
 160   "Specify username and password for servers, directly or via .netrc file.
 161 This variable can either be a filename pointing to a file in netrc(5)
 162 format, or list of four-element lists that contain, in order,
 163 `servername' (a string), `port' (an integer), `user' (a string) and
 164 `password' (a string, or nil to query the user when needed).  If you
 165 need to enter a `realm' too, add it to the user string, so that it
 166 looks like `user@realm'."
 167   :type '(choice file
 168                  (repeat (list (string  :tag "Server")
 169                        (integer :tag "Port")
 170                        (string  :tag "Username")
 171                        (choice (const :tag "Query when needed" nil)
 172                                        (string  :tag "Password")))))
 173   :version "21.4"
 174   :group 'smtpmail)
 175
 176 (defcustom smtpmail-starttls-credentials '(("" 25 "" ""))
 177   "Specify STARTTLS keys and certificates for servers.
 178 This is a list of four-element list with `servername' (a string),
 179 `port' (an integer), `key' (a filename) and `certificate' (a filename)."
 180   :type '(repeat (list (string  :tag "Server")
 181                        (integer :tag "Port")
 182                        (file    :tag "Key")
 183                        (file    :tag "Certificate")))
 184   :version "21.1"
 185   :group 'smtpmail)
 186
 187 (defcustom smtpmail-warn-about-unknown-extensions nil
 188   "*If set, print warnings about unknown SMTP extensions.
 189 This is mainly useful for development purposes, to learn about
 190 new SMTP extensions that might be useful to support."
 191   :type 'boolean
 192   :version "21.1"
 193   :group 'smtpmail)
 194
 195 (defvar smtpmail-queue-index-file "index"
 196   "File name of queued mail index,
 197 This is relative to `smtpmail-queue-dir'.")
 198
 199 (defvar smtpmail-address-buffer)
 200 (defvar smtpmail-recipient-address-list)
 201
 202 (defvar smtpmail-queue-counter 0)
 203
 204 ;; Buffer-local variable.
 205 (defvar smtpmail-read-point)
 206
 207 (defvar smtpmail-queue-index (concat smtpmail-queue-dir
 208                                      smtpmail-queue-index-file))
 209
 210 (defconst smtpmail-auth-supported '(cram-md5 login)
 211   "List of supported SMTP AUTH mechanisms.")
 212
 213 ;;;
 214 ;;;
 215 ;;;
 216
 217 (defvar smtpmail-mail-address nil
 218   "Value to use for envelope-from address for mail from ambient buffer.")
 219
 220 ;;;###autoload
 221 (defun smtpmail-send-it ()
 222   (let ((errbuf (if mail-interactive
 223                     (generate-new-buffer " smtpmail errors")
 224                   0))
 225         (tembuf (generate-new-buffer " smtpmail temp"))
 226         (case-fold-search nil)
 227         delimline
 228         (mailbuf (current-buffer))
 229         ;; Examine this variable now, so that
 230         ;; local binding in the mail buffer will take effect.
 231         (smtpmail-mail-address
 232          (or (and mail-specify-envelope-from (mail-envelope-from))
 233              user-mail-address))
 234         (smtpmail-code-conv-from
 235          (if enable-multibyte-characters
 236              (let ((sendmail-coding-system smtpmail-code-conv-from))
 237                (select-message-coding-system)))))
 238     (unwind-protect
 239         (save-excursion
 240           (set-buffer tembuf)
 241           (erase-buffer)
 242           (insert-buffer-substring mailbuf)
 243           (goto-char (point-max))
 244           ;; require one newline at the end.
 245           (or (= (preceding-char) ?\n)
 246               (insert ?\n))
 247           ;; Change header-delimiter to be what sendmail expects.
 248           (mail-sendmail-undelimit-header)
 249           (setq delimline (point-marker))
 250 ;;        (sendmail-synch-aliases)
 251           (if mail-aliases
 252               (expand-mail-aliases (point-min) delimline))
 253           (goto-char (point-min))
 254           ;; ignore any blank lines in the header
 255           (while (and (re-search-forward "\n\n\n*" delimline t)
 256                       (< (point) delimline))
 257             (replace-match "\n"))
 258           (let ((case-fold-search t))
 259             ;; We used to process Resent-... headers here,
 260             ;; but it was not done properly, and the job
 261             ;; is done correctly in smtpmail-deduce-address-list.
 262             ;; Don't send out a blank subject line
 263             (goto-char (point-min))
 264             (if (re-search-forward "^Subject:\\([ \t]*\n\\)+\\b" delimline t)
 265                 (replace-match "")
 266               ;; This one matches a Subject just before the header delimiter.
 267               (if (and (re-search-forward "^Subject:\\([ \t]*\n\\)+" delimline t)
 268                        (= (match-end 0) delimline))
 269                   (replace-match "")))
 270             ;; Put the "From:" field in unless for some odd reason
 271             ;; they put one in themselves.
 272             (goto-char (point-min))
 273             (if (not (re-search-forward "^From:" delimline t))
 274                 (let* ((login smtpmail-mail-address)
 275                        (fullname (user-full-name)))
 276                   (cond ((eq mail-from-style 'angles)
 277                          (insert "From: " fullname)
 278                          (let ((fullname-start (+ (point-min) 6))
 279                                (fullname-end (point-marker)))
 280                            (goto-char fullname-start)
 281                            ;; Look for a character that cannot appear unquoted
 282                            ;; according to RFC 822.
 283                            (if (re-search-forward "[^- !#-'*+/-9=?A-Z^-~]"
 284                                                   fullname-end 1)
 285                                (progn
 286                                  ;; Quote fullname, escaping specials.
 287                                  (goto-char fullname-start)
 288                                  (insert "\"")
 289                                  (while (re-search-forward "[\"\\]"
 290                                                            fullname-end 1)
 291                                    (replace-match "\\\\\\&" t))
 292                                  (insert "\""))))
 293                          (insert " <" login ">\n"))
 294                         ((eq mail-from-style 'parens)
 295                          (insert "From: " login " (")
 296                          (let ((fullname-start (point)))
 297                            (insert fullname)
 298                            (let ((fullname-end (point-marker)))
 299                              (goto-char fullname-start)
 300                              ;; RFC 822 says \ and nonmatching parentheses
 301                              ;; must be escaped in comments.
 302                              ;; Escape every instance of ()\ ...
 303                              (while (re-search-forward "[()\\]" fullname-end 1)
 304                                (replace-match "\\\\\\&" t))
 305                              ;; ... then undo escaping of matching parentheses,
 306                              ;; including matching nested parentheses.
 307                              (goto-char fullname-start)
 308                              (while (re-search-forward
 309                                      "\\(\\=\\|[^\\]\\(\\\\\\\\\\)*\\)\\\\(\\(\\([^\\]\\|\\\\\\\\\\)*\\)\\\\)"
 310                                      fullname-end 1)
 311                                (replace-match "\\1(\\3)" t)
 312                                (goto-char fullname-start))))
 313                          (insert ")\n"))
 314                         ((null mail-from-style)
 315                          (insert "From: " login "\n")))))
 316             ;; Insert a `Message-Id:' field if there isn't one yet.
 317             (goto-char (point-min))
 318             (unless (re-search-forward "^Message-Id:" delimline t)
 319               (insert "Message-Id: " (message-make-message-id) "\n"))
 320             ;; Insert a `Date:' field if there isn't one yet.
 321             (goto-char (point-min))
 322             (unless (re-search-forward "^Date:" delimline t)
 323               (insert "Date: " (message-make-date) "\n"))
 324             ;; Insert an extra newline if we need it to work around
 325             ;; Sun's bug that swallows newlines.
 326             (goto-char (1+ delimline))
 327             (if (eval mail-mailer-swallows-blank-line)
 328                 (newline))
 329             ;; Find and handle any FCC fields.
 330             (goto-char (point-min))
 331             (if (re-search-forward "^FCC:" delimline t)
 332                 (mail-do-fcc delimline))
 333             (if mail-interactive
 334                 (with-current-buffer errbuf
 335                   (erase-buffer))))
 336           ;;
 337           ;;
 338           ;;
 339           (setq smtpmail-address-buffer (generate-new-buffer "*smtp-mail*"))
 340           (setq smtpmail-recipient-address-list
 341                     (smtpmail-deduce-address-list tembuf (point-min) delimline))
 342           (kill-buffer smtpmail-address-buffer)
 343
 344           (smtpmail-do-bcc delimline)
 345           ; Send or queue
 346           (if (not smtpmail-queue-mail)
 347               (if (not (null smtpmail-recipient-address-list))
 348                   (if (not (smtpmail-via-smtp
 349                             smtpmail-recipient-address-list tembuf))
 350                       (error "Sending failed; SMTP protocol error"))
 351                 (error "Sending failed; no recipients"))
 352             (let* ((file-data
 353                     (expand-file-name
 354                      (format "%s_%i"
 355                              (format-time-string "%Y-%m-%d_%H:%M:%S")
 356                              (setq smtpmail-queue-counter
 357                                    (1+ smtpmail-queue-counter)))
 358                      smtpmail-queue-dir))
 359                    (file-data (convert-standard-filename file-data))
 360                    (file-elisp (concat file-data ".el"))
 361                    (buffer-data (create-file-buffer file-data))
 362                    (buffer-elisp (create-file-buffer file-elisp))
 363                    (buffer-scratch "*queue-mail*"))
 364               (unless (file-exists-p smtpmail-queue-dir)
 365                 (make-directory smtpmail-queue-dir t))
 366               (with-current-buffer buffer-data
 367                 (erase-buffer)
 368                 (insert-buffer tembuf)
 369                 (write-file file-data)
 370                 (set-buffer buffer-elisp)
 371                 (erase-buffer)
 372                 (insert (concat
 373                          "(setq smtpmail-recipient-address-list '"
 374                          (prin1-to-string smtpmail-recipient-address-list)
 375                          ")\n"))
 376                 (write-file file-elisp)
 377                 (set-buffer (generate-new-buffer buffer-scratch))
 378                 (insert (concat file-data "\n"))
 379                 (append-to-file (point-min)
 380                                 (point-max)
 381                                 smtpmail-queue-index)
 382                 )
 383               (kill-buffer buffer-scratch)
 384               (kill-buffer buffer-data)
 385               (kill-buffer buffer-elisp))))
 386       (kill-buffer tembuf)
 387       (if (bufferp errbuf)
 388           (kill-buffer errbuf)))))
 389
 390 ;;;###autoload
 391 (defun smtpmail-send-queued-mail ()
 392   "Send mail that was queued as a result of setting `smtpmail-queue-mail'."
 393   (interactive)
 394   (with-temp-buffer
 395     ;;; Get index, get first mail, send it, update index, get second
 396     ;;; mail, send it, etc...
 397     (let ((file-msg ""))
 398       (insert-file-contents smtpmail-queue-index)
 399       (beginning-of-buffer)
 400       (while (not (eobp))
 401         (setq file-msg (buffer-substring (point) (line-end-position)))
 402         (load file-msg)
 403         ;; Insert the message literally: it is already encoded as per
 404         ;; the MIME headers, and code conversions might guess the
 405         ;; encoding wrongly.
 406         (with-temp-buffer
 407           (let ((coding-system-for-read 'no-conversion))
 408             (insert-file-contents file-msg))
 409           (let ((smtpmail-mail-address
 410                  (or (and mail-specify-envelope-from (mail-envelope-from))
 411                      user-mail-address)))
 412             (if (not (null smtpmail-recipient-address-list))
 413                 (if (not (smtpmail-via-smtp smtpmail-recipient-address-list
 414                                             (current-buffer)))
 415                     (error "Sending failed; SMTP protocol error"))
 416               (error "Sending failed; no recipients"))))
 417         (delete-file file-msg)
 418         (delete-file (concat file-msg ".el"))
 419         (delete-region (point-at-bol) (point-at-bol 2)))
 420       (write-region (point-min) (point-max) smtpmail-queue-index))))
 421
 422 ;(defun smtpmail-via-smtp (host,port,sender,destination,smtpmail-text-buffer)
 423
 424 (defun smtpmail-fqdn ()
 425   (if smtpmail-local-domain
 426       (concat (system-name) "." smtpmail-local-domain)
 427     (system-name)))
 428
 429 (defsubst smtpmail-cred-server (cred)
 430   (nth 0 cred))
 431
 432 (defsubst smtpmail-cred-port (cred)
 433   (nth 1 cred))
 434
 435 (defsubst smtpmail-cred-key (cred)
 436   (nth 2 cred))
 437
 438 (defsubst smtpmail-cred-user (cred)
 439   (nth 2 cred))
 440
 441 (defsubst smtpmail-cred-cert (cred)
 442   (nth 3 cred))
 443
 444 (defsubst smtpmail-cred-passwd (cred)
 445   (nth 3 cred))
 446
 447 (defun smtpmail-find-credentials (cred server port)
 448   (catch 'done
 449     (let ((l cred) el)
 450       (while (setq el (pop l))
 451         (when (and (equal server (smtpmail-cred-server el))
 452                    (equal port (smtpmail-cred-port el)))
 453           (throw 'done el))))))
 454
 455 (defun smtpmail-maybe-append-domain (recipient)
 456   (if (or (not smtpmail-sendto-domain)
 457           (string-match "@" recipient))
 458       recipient
 459     (concat recipient "@" smtpmail-sendto-domain)))
 460
 461 (defun smtpmail-intersection (list1 list2)
 462   (let ((result nil))
 463     (dolist (el2 list2)
 464       (when (memq el2 list1)
 465         (push el2 result)))
 466     (nreverse result)))
 467
 468 (defun smtpmail-open-stream (process-buffer host port)
 469   (let ((cred (smtpmail-find-credentials
 470                smtpmail-starttls-credentials host port)))
 471     (if (null (and cred (condition-case ()
 472                             (progn
 473                               (require 'starttls)
 474                               (call-process starttls-program))
 475                           (error nil))))
 476         ;; The normal case.
 477         (open-network-stream "SMTP" process-buffer host port)
 478       (let* ((cred-key (smtpmail-cred-key cred))
 479              (cred-cert (smtpmail-cred-cert cred))
 480              (starttls-extra-args
 481               (when (and (stringp cred-key) (stringp cred-cert)
 482                          (file-regular-p
 483                           (setq cred-key (expand-file-name cred-key)))
 484                          (file-regular-p
 485                           (setq cred-cert (expand-file-name cred-cert))))
 486                 (list "--key-file" cred-key "--cert-file" cred-cert)))
 487              (starttls-extra-arguments
 488               (when (and (stringp cred-key) (stringp cred-cert)
 489                          (file-regular-p
 490                           (setq cred-key (expand-file-name cred-key)))
 491                          (file-regular-p
 492                           (setq cred-cert (expand-file-name cred-cert))))
 493                 (list "--x509keyfile" cred-key "--x509certfile" cred-cert))))
 494         (starttls-open-stream "SMTP" process-buffer host port)))))
 495
 496 (defun smtpmail-try-auth-methods (process supported-extensions host port)
 497   (let* ((mechs (cdr-safe (assoc 'auth supported-extensions)))
 498          (mech (car (smtpmail-intersection smtpmail-auth-supported mechs)))
 499          (cred (if (stringp smtpmail-auth-credentials)
 500                    (let* ((netrc (netrc-parse smtpmail-auth-credentials))
 501                           (port-name (format "%s" (or port "smtp")))
 502                           (hostentry (netrc-machine netrc host port-name
 503                                                     port-name)))
 504                      (when hostentry
 505                        (list host port
 506                              (netrc-get hostentry "login")
 507                              (netrc-get hostentry "password"))))
 508                  (smtpmail-find-credentials
 509                   smtpmail-auth-credentials host port)))
 510          (passwd (when cred
 511                    (or (smtpmail-cred-passwd cred)
 512                        (read-passwd
 513                         (format "SMTP password for %s:%s: "
 514                                 (smtpmail-cred-server cred)
 515                                 (smtpmail-cred-port cred))))))
 516          ret)
 517     (when (and cred mech)
 518       (cond
 519        ((eq mech 'cram-md5)
 520         (smtpmail-send-command process (format "AUTH %s" mech))
 521         (if (or (null (car (setq ret (smtpmail-read-response process))))
 522                 (not (integerp (car ret)))
 523                 (>= (car ret) 400))
 524             (throw 'done nil))
 525         (when (eq (car ret) 334)
 526           (let* ((challenge (substring (cadr ret) 4))
 527                  (decoded (base64-decode-string challenge))
 528                  (hash (rfc2104-hash 'md5 64 16 passwd decoded))
 529                  (response (concat (smtpmail-cred-user cred) " " hash))
 530                  (encoded (base64-encode-string response)))
 531             (smtpmail-send-command process (format "%s" encoded))
 532             (if (or (null (car (setq ret (smtpmail-read-response process))))
 533                     (not (integerp (car ret)))
 534                     (>= (car ret) 400))
 535                 (throw 'done nil)))))
 536        ((eq mech 'login)
 537         (smtpmail-send-command process "AUTH LOGIN")
 538         (if (or (null (car (setq ret (smtpmail-read-response process))))
 539                 (not (integerp (car ret)))
 540                 (>= (car ret) 400))
 541             (throw 'done nil))
 542         (smtpmail-send-command
 543          process (base64-encode-string (smtpmail-cred-user cred)))
 544         (if (or (null (car (setq ret (smtpmail-read-response process))))
 545                 (not (integerp (car ret)))
 546                 (>= (car ret) 400))
 547             (throw 'done nil))
 548         (smtpmail-send-command process (base64-encode-string passwd))
 549         (if (or (null (car (setq ret (smtpmail-read-response process))))
 550                 (not (integerp (car ret)))
 551                 (>= (car ret) 400))
 552             (throw 'done nil)))
 553        (t
 554         (error "Mechanism %s not implemented" mech)))
 555       ;; Remember the password.
 556       (when (and (not (stringp smtpmail-auth-credentials))
 557                  (null (smtpmail-cred-passwd cred)))
 558         (setcar (cdr (cdr (cdr cred))) passwd)))))
 559
 560 (defun smtpmail-via-smtp (recipient smtpmail-text-buffer)
 561   (let ((process nil)
 562         (host (or smtpmail-smtp-server
 563                   (error "`smtpmail-smtp-server' not defined")))
 564         (port smtpmail-smtp-service)
 565         ;; smtpmail-mail-address should be set to the appropriate
 566         ;; buffer-local value by the caller, but in case not:
 567         (envelope-from (or smtpmail-mail-address
 568                            (and mail-specify-envelope-from
 569                                 (mail-envelope-from))
 570                            user-mail-address))
 571         response-code
 572         greeting
 573         process-buffer
 574         (supported-extensions '()))
 575     (unwind-protect
 576         (catch 'done
 577           ;; get or create the trace buffer
 578           (setq process-buffer
 579                 (get-buffer-create (format "*trace of SMTP session to %s*" host)))
 580
 581           ;; clear the trace buffer of old output
 582           (with-current-buffer process-buffer
 583             (erase-buffer))
 584
 585           ;; open the connection to the server
 586           (setq process (smtpmail-open-stream process-buffer host port))
 587           (and (null process) (throw 'done nil))
 588
 589           ;; set the send-filter
 590           (set-process-filter process 'smtpmail-process-filter)
 591
 592           (with-current-buffer process-buffer
 593             (set-buffer-process-coding-system 'raw-text-unix 'raw-text-unix)
 594             (make-local-variable 'smtpmail-read-point)
 595             (setq smtpmail-read-point (point-min))
 596
 597
 598             (if (or (null (car (setq greeting (smtpmail-read-response process))))
 599                     (not (integerp (car greeting)))
 600                     (>= (car greeting) 400))
 601                 (throw 'done nil)
 602               )
 603
 604             (let ((do-ehlo t)
 605                   (do-starttls t))
 606               (while do-ehlo
 607             ;; EHLO
 608             (smtpmail-send-command process (format "EHLO %s" (smtpmail-fqdn)))
 609
 610             (if (or (null (car (setq response-code
 611                                      (smtpmail-read-response process))))
 612                     (not (integerp (car response-code)))
 613                     (>= (car response-code) 400))
 614                 (progn
 615                   ;; HELO
 616                   (smtpmail-send-command
 617                    process (format "HELO %s" (smtpmail-fqdn)))
 618
 619                   (if (or (null (car (setq response-code
 620                                            (smtpmail-read-response process))))
 621                           (not (integerp (car response-code)))
 622                           (>= (car response-code) 400))
 623                       (throw 'done nil)))
 624               (dolist (line (cdr (cdr response-code)))
 625                 (let ((name (mapcar (lambda (s) (intern (downcase s)))
 626                                     (split-string (substring line 4) "[ ]"))))
 627                   (and (eq (length name) 1)
 628                        (setq name (car name)))
 629                     (and name
 630                        (cond ((memq (if (consp name) (car name) name)
 631                                     '(verb xvrb 8bitmime onex xone
 632                                                   expn size dsn etrn
 633                                       enhancedstatuscodes
 634                                       help xusr
 635                                       auth=login auth starttls))
 636                                 (setq supported-extensions
 637                                       (cons name supported-extensions)))
 638                                (smtpmail-warn-about-unknown-extensions
 639                               (message "Unknown extension %s" name)))))))
 640
 641             (if (and do-starttls
 642                      (smtpmail-find-credentials smtpmail-starttls-credentials host port)
 643                      (member 'starttls supported-extensions)
 644                      (numberp (process-id process)))
 645                 (progn
 646                   (smtpmail-send-command process (format "STARTTLS"))
 647                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 648                           (not (integerp (car response-code)))
 649                           (>= (car response-code) 400))
 650                       (throw 'done nil))
 651                   (starttls-negotiate process)
 652                   (setq do-starttls nil))
 653               (setq do-ehlo nil))))
 654
 655             (smtpmail-try-auth-methods process supported-extensions host port)
 656
 657             (if (or (member 'onex supported-extensions)
 658                     (member 'xone supported-extensions))
 659                 (progn
 660                   (smtpmail-send-command process (format "ONEX"))
 661                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 662                           (not (integerp (car response-code)))
 663                           (>= (car response-code) 400))
 664                       (throw 'done nil))))
 665
 666             (if (and smtpmail-debug-verb
 667                      (or (member 'verb supported-extensions)
 668                          (member 'xvrb supported-extensions)))
 669                 (progn
 670                   (smtpmail-send-command process (format "VERB"))
 671                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 672                           (not (integerp (car response-code)))
 673                           (>= (car response-code) 400))
 674                       (throw 'done nil))))
 675
 676             (if (member 'xusr supported-extensions)
 677                 (progn
 678                   (smtpmail-send-command process (format "XUSR"))
 679                   (if (or (null (car (setq response-code (smtpmail-read-response process))))
 680                           (not (integerp (car response-code)))
 681                           (>= (car response-code) 400))
 682                       (throw 'done nil))))
 683
 684             ;; MAIL FROM:<sender>
 685             (let ((size-part
 686                    (if (or (member 'size supported-extensions)
 687                            (assoc 'size supported-extensions))
 688                        (format " SIZE=%d"
 689                                (with-current-buffer smtpmail-text-buffer
 690                                  ;; size estimate:
 691                                  (+ (- (point-max) (point-min))
 692                                     ;; Add one byte for each change-of-line
 693                                     ;; because of CR-LF representation:
 694                                     (count-lines (point-min) (point-max)))))
 695                      ""))
 696                   (body-part
 697                    (if (member '8bitmime supported-extensions)
 698                        ;; FIXME:
 699                        ;; Code should be added here that transforms
 700                        ;; the contents of the message buffer into
 701                        ;; something the receiving SMTP can handle.
 702                        ;; For a receiver that supports 8BITMIME, this
 703                        ;; may mean converting BINARY to BASE64, or
 704                        ;; adding Content-Transfer-Encoding and the
 705                        ;; other MIME headers.  The code should also
 706                        ;; return an indication of what encoding the
 707                        ;; message buffer is now, i.e. ASCII or
 708                        ;; 8BITMIME.
 709                        (if nil
 710                            " BODY=8BITMIME"
 711                          "")
 712                      "")))
 713 ;             (smtpmail-send-command process (format "MAIL FROM:%s@%s" (user-login-name) (smtpmail-fqdn)))
 714               (smtpmail-send-command process (format "MAIL FROM:<%s>%s%s"
 715                                                      envelope-from
 716                                                      size-part
 717                                                      body-part))
 718
 719               (if (or (null (car (setq response-code (smtpmail-read-response process))))
 720                       (not (integerp (car response-code)))
 721                       (>= (car response-code) 400))
 722                   (throw 'done nil)
 723                 ))
 724
 725             ;; RCPT TO:<recipient>
 726             (let ((n 0))
 727               (while (not (null (nth n recipient)))
 728                 (smtpmail-send-command process (format "RCPT TO:<%s>" (smtpmail-maybe-append-domain (nth n recipient))))
 729                 (setq n (1+ n))
 730
 731                 (setq response-code (smtpmail-read-response process))
 732                 (if (or (null (car response-code))
 733                         (not (integerp (car response-code)))
 734                         (>= (car response-code) 400))
 735                     (throw 'done nil)
 736                   )
 737                 ))
 738
 739             ;; DATA
 740             (smtpmail-send-command process "DATA")
 741
 742             (if (or (null (car (setq response-code (smtpmail-read-response process))))
 743                     (not (integerp (car response-code)))
 744                     (>= (car response-code) 400))
 745                 (throw 'done nil)
 746               )
 747
 748             ;; Mail contents
 749             (smtpmail-send-data process smtpmail-text-buffer)
 750
 751             ;;DATA end "."
 752             (smtpmail-send-command process ".")
 753
 754             (if (or (null (car (setq response-code (smtpmail-read-response process))))
 755                     (not (integerp (car response-code)))
 756                     (>= (car response-code) 400))
 757                 (throw 'done nil)
 758               )
 759
 760             ;;QUIT
 761 ;           (smtpmail-send-command process "QUIT")
 762 ;           (and (null (car (smtpmail-read-response process)))
 763 ;                (throw 'done nil))
 764             t ))
 765       (if process
 766           (with-current-buffer (process-buffer process)
 767             (smtpmail-send-command process "QUIT")
 768             (smtpmail-read-response process)
 769
 770 ;           (if (or (null (car (setq response-code (smtpmail-read-response process))))
 771 ;                   (not (integerp (car response-code)))
 772 ;                   (>= (car response-code) 400))
 773 ;               (throw 'done nil)
 774 ;             )
 775             (delete-process process)
 776             (unless smtpmail-debug-info
 777               (kill-buffer process-buffer)))))))
 778
 779
 780 (defun smtpmail-process-filter (process output)
 781   (with-current-buffer (process-buffer process)
 782     (goto-char (point-max))
 783     (insert output)))
 784
 785 (defun smtpmail-read-response (process)
 786   (let ((case-fold-search nil)
 787         (response-strings nil)
 788         (response-continue t)
 789         (return-value '(nil ()))
 790         match-end)
 791     (catch 'done
 792       (while response-continue
 793         (goto-char smtpmail-read-point)
 794         (while (not (search-forward "\r\n" nil t))
 795           (unless (memq (process-status process) '(open run))
 796             (throw 'done nil))
 797           (accept-process-output process)
 798           (goto-char smtpmail-read-point))
 799
 800         (setq match-end (point))
 801         (setq response-strings
 802               (cons (buffer-substring smtpmail-read-point (- match-end 2))
 803                     response-strings))
 804
 805         (goto-char smtpmail-read-point)
 806         (if (looking-at "[0-9]+ ")
 807             (let ((begin (match-beginning 0))
 808                   (end (match-end 0)))
 809               (if smtpmail-debug-info
 810                   (message "%s" (car response-strings)))
 811
 812               (setq smtpmail-read-point match-end)
 813
 814               ;; ignore lines that start with "0"
 815               (if (looking-at "0[0-9]+ ")
 816                   nil
 817                 (setq response-continue nil)
 818                 (setq return-value
 819                       (cons (string-to-int
 820                              (buffer-substring begin end))
 821                             (nreverse response-strings)))))
 822
 823           (if (looking-at "[0-9]+-")
 824               (progn (if smtpmail-debug-info
 825                          (message "%s" (car response-strings)))
 826                      (setq smtpmail-read-point match-end)
 827                      (setq response-continue t))
 828             (progn
 829               (setq smtpmail-read-point match-end)
 830               (setq response-continue nil)
 831               (setq return-value
 832                     (cons nil (nreverse response-strings)))))))
 833       (setq smtpmail-read-point match-end))
 834     return-value))
 835
 836
 837 (defun smtpmail-send-command (process command)
 838   (goto-char (point-max))
 839   (if (= (aref command 0) ?P)
 840       (insert "PASS <omitted>\r\n")
 841     (insert command "\r\n"))
 842   (setq smtpmail-read-point (point))
 843   (process-send-string process command)
 844   (process-send-string process "\r\n"))
 845
 846 (defun smtpmail-send-data-1 (process data)
 847   (goto-char (point-max))
 848
 849   (if (and (multibyte-string-p data)
 850            smtpmail-code-conv-from)
 851       (setq data (string-as-multibyte
 852                   (encode-coding-string data smtpmail-code-conv-from))))
 853
 854   (if smtpmail-debug-info
 855       (insert data "\r\n"))
 856
 857   (setq smtpmail-read-point (point))
 858   ;; Escape "." at start of a line
 859   (if (eq (string-to-char data) ?.)
 860       (process-send-string process "."))
 861   (process-send-string process data)
 862   (process-send-string process "\r\n")
 863   )
 864
 865 (defun smtpmail-send-data (process buffer)
 866   (let ((data-continue t) sending-data)
 867     (with-current-buffer buffer
 868       (goto-char (point-min)))
 869     (while data-continue
 870       (with-current-buffer buffer
 871         (setq sending-data (buffer-substring (point-at-bol) (point-at-eol)))
 872         (end-of-line 2)
 873         (setq data-continue (not (eobp))))
 874       (smtpmail-send-data-1 process sending-data))))
 875
 876 (defun smtpmail-deduce-address-list (smtpmail-text-buffer header-start header-end)
 877   "Get address list suitable for smtp RCPT TO: <address>."
 878   (unwind-protect
 879       (with-current-buffer smtpmail-address-buffer
 880         (erase-buffer)
 881         (let
 882             ((case-fold-search t)
 883              (simple-address-list "")
 884              this-line
 885              this-line-end
 886              addr-regexp)
 887           (insert-buffer-substring smtpmail-text-buffer header-start header-end)
 888           (goto-char (point-min))
 889           ;; RESENT-* fields should stop processing of regular fields.
 890           (save-excursion
 891             (setq addr-regexp
 892                   (if (re-search-forward "^Resent-\\(to\\|cc\\|bcc\\):"
 893                                          header-end t)
 894                       "^Resent-\\(to\\|cc\\|bcc\\):"
 895                     "^\\(To:\\|Cc:\\|Bcc:\\)")))
 896
 897           (while (re-search-forward addr-regexp header-end t)
 898             (replace-match "")
 899             (setq this-line (match-beginning 0))
 900             (forward-line 1)
 901             ;; get any continuation lines
 902             (while (and (looking-at "^[ \t]+") (< (point) header-end))
 903               (forward-line 1))
 904             (setq this-line-end (point-marker))
 905             (setq simple-address-list
 906                   (concat simple-address-list " "
 907                           (mail-strip-quoted-names (buffer-substring this-line this-line-end))))
 908             )
 909           (erase-buffer)
 910           (insert " " simple-address-list "\n")
 911           (subst-char-in-region (point-min) (point-max) 10 ?  t);; newline --> blank
 912           (subst-char-in-region (point-min) (point-max) ?, ?  t);; comma   --> blank
 913           (subst-char-in-region (point-min) (point-max)  9 ?  t);; tab     --> blank
 914
 915           (goto-char (point-min))
 916           ;; tidyness in case hook is not robust when it looks at this
 917           (while (re-search-forward "[ \t]+" header-end t) (replace-match " "))
 918
 919           (goto-char (point-min))
 920           (let (recipient-address-list)
 921             (while (re-search-forward " \\([^ ]+\\) " (point-max) t)
 922               (backward-char 1)
 923               (setq recipient-address-list (cons (buffer-substring (match-beginning 1) (match-end 1))
 924                                                  recipient-address-list))
 925               )
 926             (setq smtpmail-recipient-address-list recipient-address-list))
 927
 928           )
 929         )
 930     )
 931   )
 932
 933
 934 (defun smtpmail-do-bcc (header-end)
 935   "Delete [Resent-]BCC: and their continuation lines from the header area.
 936 There may be multiple BCC: lines, and each may have arbitrarily
 937 many continuation lines."
 938   (let ((case-fold-search t))
 939     (save-excursion
 940       (goto-char (point-min))
 941       ;; iterate over all BCC: lines
 942       (while (re-search-forward "^\\(RESENT-\\)?BCC:" header-end t)
 943         (delete-region (match-beginning 0)
 944                        (progn (forward-line 1) (point)))
 945         ;; get rid of any continuation lines
 946         (while (and (looking-at "^[ \t].*\n") (< (point) header-end))
 947           (replace-match ""))))))
 948
 949
 950 (provide 'smtpmail)
 951
 952 ;;; arch-tag: a76992df-6d71-43b7-9e72-4bacc6c05466
 953 ;;; smtpmail.el ends here