Re: [Asrg] Question on Message-ID

[Richard Welty <rwelty at averillpark.net>]

On Wed, 9 Jun 2004 22:07:29 -0400 (EDT) Rob Carlson <rob at vees.net> wrote:

> The topica.com mailing list system changes Message-ID in transit.
> It's the only one I've encountered recently.

RFC2822 doesn't really address whether or not mailing list managers
should change Message-IDs. the language talks about whether
a message has 'changed enough' and isn't specific enough, really.
a mailing list manager will be changing MAIL FROM: and RCPT TO:,
and adding/changing some headers, and possibly adding a footer
to the body of the message with unsubscribe instructions.

in looking at a couple of messages, i see that the PostgreSQL lists
(majordomo 2) changes it, the openbsd lists (majordomo 2?) don't
change it, the exim-users list (mailman/exim) don't change it,
nanog (majordomo 1) and the lists i run on digest.net (majordomo
1) don't change it. i don't have any samples read to hand from
ezmlm/qmail.

the most unique one i found are the mac lists on maclaunch.com,
which change it and thoughtfully preserve the original one in the
X-Original-Message-ID: header.

so mailing list manager behavior with respect to message id
is all over the map, and the RFC is vague enough that either is
probably ok for some value of ok.

richard
-- 
Richard Welty                                         rwelty at averillpark.net
Averill Park Networking                                         518-573-7592
    Java, PHP, PostgreSQL, Unix, Linux, IP Network Engineering, Security


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