GNU bug report logs - #9392
24.0.50; rmail-forward produces messages in unsupported format that cannot be customized away

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Message #41 received at 9392 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: julien <at> danjou.info
Cc: 9392 <at> debbugs.gnu.org, handa <at> m17n.org
Subject: Re: bug#9392: 24.0.50;
	rmail-forward produces messages in unsupported format that
	cannot	be	customized away
Date: Fri, 02 Sep 2011 21:47:33 +0300

> Date: Fri, 02 Sep 2011 20:59:10 +0300
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: 9392 <at> debbugs.gnu.org
> 
> Done, thanks.  Now on to the original problem...

Is this the right way of converting MML to MIME when sendmail is used
as the MUA?

=== modified file 'lisp/simple.el'
--- lisp/simple.el	2011-07-28 14:05:07 +0000
+++ lisp/simple.el	2011-09-02 18:15:07 +0000
@@ -5727,6 +5727,11 @@ else the end of the last line.  This fun
 	 "^\\([:\n]\\|[^: \t\n]+[ \t\n]\\)" nil 'move)
     (goto-char (match-beginning 0))))
 
+;; Used by Rmail (e.g., rmail-forward).
+(defvar mail-encode-mml nil
+  "If non-nil, mail-user-agent's `sendfunc' command should mml-encode
+the outgoing message before sending it.")
+
 (defun compose-mail (&optional to subject other-headers continue
 		     switch-function yank-action send-actions
 		     return-action)

=== modified file 'lisp/mail/rmail.el'
--- lisp/mail/rmail.el	2011-08-16 02:29:15 +0000
+++ lisp/mail/rmail.el	2011-09-02 18:41:09 +0000
@@ -91,6 +91,7 @@ its character representation and its dis
 (defvar messages-head)
 (defvar total-messages)
 (defvar tool-bar-map)
+(defvar mail-encode-mml)
 
 (defvar rmail-header-style 'normal
   "The current header display style choice, one of
@@ -642,7 +643,7 @@ unless the feature specified by `rmail-m
   :version "23.3"
   :group 'rmail)
 
-(defvar rmail-enable-mime-composing nil
+(defvar rmail-enable-mime-composing t
   "*If non-nil, RMAIL uses `rmail-insert-mime-forwarded-message-function' to forward.")
 
 ;; FIXME unused.
@@ -3794,9 +3795,17 @@ see the documentation of `rmail-resend'.
 	    ;; Insert after header separator--before signature if any.
 	    (rfc822-goto-eoh)
 	    (forward-line 1)
-	    (if (or rmail-enable-mime rmail-enable-mime-composing)
-		(funcall rmail-insert-mime-forwarded-message-function
-			 forward-buffer)
+	    (if (and rmail-enable-mime rmail-enable-mime-composing)
+		(prog1
+		    (funcall rmail-insert-mime-forwarded-message-function
+			     forward-buffer)
+		  ;; rmail-insert-mime-forwarded-message-function
+		  ;; works by inserting MML tags into forward-buffer.
+		  ;; The MUA will need to convert it to MIME before
+		  ;; sending.  mail-encode-mml tells them to do that.
+		  ;; message.el does that automagically.
+		  (or (eq mail-user-agent 'message-user-agent)
+		      (setq mail-encode-mml t)))
 	      (insert "------- Start of forwarded message -------\n")
 	      ;; Quote lines with `- ' if they start with `-'.
 	      (let ((beg (point)) end)

=== modified file 'lisp/mail/sendmail.el'
--- lisp/mail/sendmail.el	2011-08-04 00:58:07 +0000
+++ lisp/mail/sendmail.el	2011-09-02 18:46:19 +0000
@@ -31,6 +31,8 @@
 
 (require 'rfc2047)
 
+(require 'mml)
+
 (defgroup sendmail nil
   "Mail sending commands for Emacs."
   :prefix "mail-"
@@ -678,6 +680,7 @@ switching to, the `*mail*' buffer.  See 
   :options '(footnote-mode))
 
 (defvar mail-mode-abbrev-table text-mode-abbrev-table)
+(defvar mail-encode-mml)
 ;;;###autoload
 (define-derived-mode mail-mode text-mode "Mail"
   "Major mode for editing mail to be sent.
@@ -701,6 +704,8 @@ Turning on Mail mode runs the normal hoo
   (make-local-variable 'mail-reply-action)
   (make-local-variable 'mail-send-actions)
   (make-local-variable 'mail-return-action)
+  (make-local-variable 'mail-encode-mml)
+  (setq mail-encode-mml nil)
   (setq buffer-offer-save t)
   (make-local-variable 'font-lock-defaults)
   (setq font-lock-defaults '(mail-font-lock-keywords t t))
@@ -934,6 +939,9 @@ the user from the mailer."
 	      (error "Invalid header line (maybe a continuation line lacks initial whitespace)"))
 	    (forward-line 1)))
 	(goto-char opoint)
+	(when mail-encode-mml
+	  (mml-to-mime)
+	  (setq mail-encode-mml nil))
 	(run-hooks 'mail-send-hook)
 	(message "Sending...")
 	(funcall send-mail-function)

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