[Mailman-Users] Re: [Mailman-Developers] Mailman can't handle MIME: Content-transfer-encoding: quoted-printable?

[James Madill]

        Notes, the originating Mailer of the message in question is also 
ESMTP.  My MTA, sendmail 8.12.1, is an ESMTP mailer, and able to correctly 
handle a lone period on a line in the middle of an E-mail message.  What 
MTA does Mailman use when DELIVERY_MODULE is set to 'SMTPDirect'? Internal 
code?

        I think that what is happening is that the MTA that Mailman is 
talking to is not told that ESMTP should be used.  In doing so, when 
Mailman writes out to the MTA, the MTA sees the EOM marker and stops 
accepting data for that message.

-- James

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barry at zope.com (Barry A. Warsaw)
Sent by: mailman-users-admin at python.org
03/14/02 18:30

 
        To:     "James Madill" <James.Madill at duke.edu>
        cc:     mailman-developers at python.org, Mailman-Users at python.org
        Subject:        [Mailman-Users] Re: [Mailman-Developers] Mailman can't handle MIME: 
Content-transfer-encoding: quoted-printable?



>>>>> "JM" == James Madill <James.Madill at duke.edu> writes:

    JM> Sendmail accepted the encoded document for Mailman, but on
    JM> sending out, Mailman encountered what it thought was an EOM
    JM> marker and stopped the processing of the message at that
    JM> point.  Unfortunately, there was still plenty of message left
    JM> to send, so it was not removed from the queue, and Mailman
    JM> kept on sending the first portion.

>>>>> "BG" == Ben Gertzfield <che at debian.org> writes:

    BG> Mailman 2.1 has an entirely re-written infrastructure for MIME
    BG> message handling, and likely has fixed this bug (the old
    BG> quoted-printable module had some serious flaws and has been
    BG> re-written).

    BG> If you could send us a copy of the naughty message, we could
    BG> test it with Mailman 2.1 from CVS and let you know if the bug
    BG> has been fixed, but I'll bet that it has been fixed now.

I'd still be very surprised if this ends up being a Mailman problem.
Python strings don't care at all about end-markers, NULs, etc. so you
can't put something in a string that would cause Python to shorten
it.  And Mailman just uses the file object's read() method to suck the
message in from disk, and that just reads the whole file.  On writing,
Mailman will hand the whole string over to the smtplib module, which
itself just blasts the whole thing down the socket connection.

I'm much more suspicious of the MTA or some other intermediary
bolluxing something up.

-Barry

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