GNU bug report logs - #78996
29.4; Invalid authinfo credentials when sending mail through SMTP

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#78996: closed (29.4; Invalid authinfo credentials when
 sending mail through SMTP)
Date: Sun, 20 Jul 2025 11:50:02 +0000

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Your message dated Sun, 20 Jul 2025 14:49:48 +0300
with message-id <86pldvcc9v.fsf <at> gnu.org>
and subject line Re: bug#78996: 29.4; Invalid authinfo credentials when sending mail through SMTP
has caused the debbugs.gnu.org bug report #78996,
regarding 29.4; Invalid authinfo credentials when sending mail through SMTP
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: 8dcc <8dcc.lists <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.4; Invalid authinfo credentials when sending mail through SMTP
Date: Fri, 11 Jul 2025 17:58:47 +0200

Hello,

I have been trying to write a simple Emacs Lisp function that lets me
select the credentials that are used when sending mail through
`compose-mail' with `message-send-mail-function' set to
`smtpmail-send-it'. I tried many things, including modifying the "From:"
field, and changing `user-mail-address' (both locally and
globally). Although the "From" header does indeed change to the right
value when sending the email, the credentials used when authenticating
with the SMTP server don't change; in the case of Gmail, this "From"
header gets overwritten and a new "X-Google-Original-From" header is
added.

I thought that the email that was used for authentication was the one I
had originally set as `user-mail-address', but it turns out that it
entirely depends on the order of the entries in my '~/authinfo.gpg'
file.

For example, if the contents of the file were:

    machine 127.0.0.1 login my-user port ssh password "****"
    machine smtp.gmail.com login foo <at> gmail.com password "****" port 465
    machine smtp.gmail.com login bar <at> gmail.com password "****" port 465

Then the credentials of "foo <at> gmail.com" would be used, since it's the
first line whose "machine" value matches the value of my
`smtpmail-smtp-server' variable.

Please let me know if you need any more information.

Thank you,
8dcc.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: 8dcc <8dcc.git <at> gmail.com>
Cc: 78996-done <at> debbugs.gnu.org
Subject: Re: bug#78996: 29.4;
 Invalid authinfo credentials when sending mail through SMTP
Date: Sun, 20 Jul 2025 14:49:48 +0300

> From: 8dcc <8dcc.git <at> gmail.com>
> Cc: 78996 <at> debbugs.gnu.org
> Date: Sun, 20 Jul 2025 12:21:40 +0200
> 
> > You have message-send-hook and message-sent-hook to do this.
> >
> > I don't understand why this is hacky, since your original code was
> > also in a hook.
> 
> I think modifying a global variable permanently from within a hook is
> hacky, and I think saving it in a temporary variable across hooks is
> also a hacky work-around. That's just my opinion.

Understood.

> > Anyway, I think this bug can be closed now?
> 
> Yes. Thank you for your help!

Thanks, done.

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