bug#24653: 25.1.50; Gnus; X-Message-SMTP-Method header does not support port number as advertised

[Alain Schneble]

Gnus X-Message-SMTP-Method header does not support a port number in its
value even though this is described in the manual.  This special header
can be used to specify an alternative email server to which the message
should be sent.  It works properly when supplying a service name like
smtp, but not with a service port number.

Recipe:
- emacs -Q
- eval:
  (defun test-message-send-hook ()
    (message-add-header "X-Message-SMTP-Method: smtp smtp.fsf.org 587"))
  (add-hook 'message-send-hook 'test-message-send-hook)
- M-x compose-mail
- Fill in To and Subject headers
- M-x message-send-and-exit

  It terminates with an error:
  => Unknown service: 587

This scenario should be supported as described in the manual:

- (info "(message)Mail Variables")
  See description of ‘message-send-mail-function’ about ‘smtpmail’:
  
       ‘smtpmail’

               X-Message-SMTP-Method: smtp smtp.fsf.org 587

          This will send the message via ‘smtp.fsf.org’, using port 587.

               X-Message-SMTP-Method: smtp smtp.fsf.org 587 other-user

          This is the same as the above, but uses ‘other-user’ as the
          user name when authenticating.  This is handy if you have
          several SMTP accounts on the same server.

Alain


In GNU Emacs 25.1.50.1 (x86_64-w64-mingw32)
 of 2016-09-27 built on MYNGB
Repository revision: bbf1ffd7c74bdf3ea766580788f7f4adb98a47f0
Windowing system distributor 'Microsoft Corp.', version 10.0.10586
Configured using:
 'configure --prefix /c/usr/bin/emacs-25.1 --without-imagemagick'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS

Important settings:
  value of $LANG: DES
  locale-coding-system: cp1252

Major mode: Org

Minor modes in effect:
  org-indent-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  shell-dirtrack-mode: t
  diff-auto-refine-mode: t
  gdb-many-windows: t
  winner-mode: t
  icomplete-mode: t
  show-paren-mode: t
  display-time-mode: t
  display-battery-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
kmacro-call-macro: No kbd macro has been defined
C-x C-g is undefined
Quit
Type "q" in help window to restore its previous buffer. [2 times]
Auto-saving...done
Saving file c:/data/private/git/Emacs.org...
Wrote c:/data/private/git/Emacs.org
Mark set
Auto-saving...done
Auto-saving...done

Features:
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custom widget hashtable-print-readable backquote w32notify w32 multi-tty
make-network-process emacs)

Memory information:
((conses 16 579416 81602)
 (symbols 56 45654 0)
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 (strings 32 114550 13852)
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