+(defun message-send-mail-partially ()
+ "Sendmail as message/partial."
+ (let ((p (goto-char (point-min)))
+ (tembuf (message-generate-new-buffer-clone-locals " message temp"))
+ (curbuf (current-buffer))
+ (id (message-make-message-id)) (n 1)
+ plist total header required-mail-headers)
+ (while (not (eobp))
+ (if (< (point-max) (+ p message-send-mail-partially-limit))
+ (goto-char (point-max))
+ (goto-char (+ p message-send-mail-partially-limit))
+ (beginning-of-line)
+ (if (<= (point) p) (forward-line 1))) ;; In case of bad message.
+ (push p plist)
+ (setq p (point)))
+ (setq total (length plist))
+ (push (point-max) plist)
+ (setq plist (nreverse plist))
+ (unwind-protect
+ (save-excursion
+ (setq p (pop plist))
+ (while plist
+ (set-buffer curbuf)
+ (copy-to-buffer tembuf p (car plist))
+ (set-buffer tembuf)
+ (goto-char (point-min))
+ (if header
+ (progn
+ (goto-char (point-min))
+ (narrow-to-region (point) (point))
+ (insert header))
+ (message-goto-eoh)
+ (setq header (buffer-substring (point-min) (point)))
+ (goto-char (point-min))
+ (narrow-to-region (point) (point))
+ (insert header)
+ (message-remove-header "Mime-Version")
+ (message-remove-header "Content-Type")
+ (message-remove-header "Content-Transfer-Encoding")
+ (message-remove-header "Message-ID")
+ (message-remove-header "Lines")
+ (goto-char (point-max))
+ (insert "Mime-Version: 1.0\n")
+ (setq header (buffer-substring (point-min) (point-max))))
+ (goto-char (point-max))
+ (insert (format "Content-Type: message/partial; id=\"%s\"; number=%d; total=%d\n"
+ id n total))
+ (let ((mail-header-separator ""))
+ (when (memq 'Message-ID message-required-mail-headers)
+ (insert "Message-ID: " (message-make-message-id) "\n"))
+ (when (memq 'Lines message-required-mail-headers)
+ (let ((mail-header-separator ""))
+ (insert "Lines: " (message-make-lines) "\n")))
+ (message-goto-subject)
+ (end-of-line)
+ (insert (format " (%d/%d)" n total))
+ (goto-char (point-max))
+ (insert "\n")
+ (widen)
+ (mm-with-unibyte-current-buffer
+ (funcall message-send-mail-function)))
+ (setq n (+ n 1))
+ (setq p (pop plist))
+ (erase-buffer)))
+ (kill-buffer tembuf))))
+