bug#38066: 26.1; X-Message-SMTP-Method header does not affect smtpmail-stream-type

[Robert Pluim]

>>>>> On Tue, 05 Nov 2019 18:42:39 +0100, Lars Ingebrigtsen <larsi@gnus.org> 
>>>>> said:

    Lars> Robert Pluim <rpluim@gmail.com> writes:
    >> +(defcustom network-stream-auto-tls-alist
    >> +  '((465 . tls)
    >> +    (587 . starttls)
    >> +    (993 . tls))

    Lars> I'm not sure I understand the rationale hre.  465 is defined as a TLS
    Lars> port, so that's what Emacs should talk on that port.  It's like port
    Lars> 443 -- it's also TLS.

465 is just a port. And eg

(open-network-stream "google" nil "mail.google.com" 465)

will attempt a STARTTLS connection (and incidentally hang my emacs
:-)). You can override that by passing in :type tls, but in some
situations you canʼt do that, hence the proposed patch.

Unless youʼre suggesting that we unconditionally use tls for 465/443?
Thatʼs another option, but itʼs sure to break someone's setup.

Robert