bug#13329: 24.2 post patch for #9521; Rmail forward does not correctly handle MIME messages containing "From " lines

[Stefan Kangas <stefankangas@gmail.com>]

Stefan Kangas <stefankangas@gmail.com> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> From: Mark Lillibridge <mdl@alum.mit.edu>
>>> Cc: eliz@gnu.org, larsi@gnus.org, 13329@debbugs.gnu.org
>>> Date: Mon, 10 Oct 2022 14:04:58 -0700
>>>
>>> >      I was using Emacs Rmail, but not the pure emacs 28.1 -q because I
>>> >  need to change settings to send email.  Let me see if I can try a purer
>>> >  reenactment.
>>>
>>>     Ok, I sent myself a message with last line "From nothing" (pure text
>>> body); fetchmail produced the attached incoming_sample.gz file, which
>>> Rmail 'g' added to an empty Rmail file to produce the attached
>>> RMAIL.sample.gz.  I did this using as pure an Rmail set up as I can with
>>> emacs 28.1.  My sending/receiving goes through MIT email forwarding and
>>> uses Gmail as a receiving service.
>>>
>>>    Both of these files have the proper mbox quoting, with a > before the
>>> >From in the body.  If I switch to emacs 28.1 -q and open that Rmail
>>> file, I see the extra > and pressing 'f' includes it in the forwarded
>>> message.  This shows both bugs (13328 and 13329).
>>>
>>>    See if you can open RMAIL.sample and reproduce the bugs on your end.
>>> If so, something must differ between our email sending/receiving before
>>> rmail processes.  If you can't reproduce the bugs given the Rmail file,
>>> I'm very confused.
>>
>> So, to summarize:
>>
>>   . the problem happens only in emails that have MIME-Version: header
>>   . the problem happens only in emails that have just the body, no
>>     attachments
>>   . the problem happens because rmail-show-mime doesn't remove the ">"
>>     from ">From" when it shows the plan-text MIME content
>>
>> Is that correct?
>
> It seems like we need more information here in order to make any
> progress.  Mark, could you answer the questions above?
>
> Thanks in advance.

More information was requested, but none was given within 4 months, so
I'm closing this bug.

If this is still an issue, please reply to this email (use "Reply to
all" in your email client) and we can reopen the bug report.