On Thu, 24 Aug 2006, Allan Trick wrote: > Getting more reports now of other internal users (we have people > subscribed within our firewall on our Exchange mail server as well as > people outside with all other kinds of email addresses) not getting > all messages. In each case, it sounds like they get ONE message, > whereas they're on between 4 and 20 different lists. They should be > getting 4-20 copies of the same message (one for each list they're > on). But they're only getting ONE. I can't see anything different > in the settings for the one successful list (not the same one for all users). > > Is it possible that Exchange is trying to be helpful by not > delivering the additional messages since they're all the same? There > is nothing in the Junk folder, but it seems logical that the mail > system might be interfering with the mail delivery here. We just > went to Exchange; previously we were on sendmail and everything worked OK.
We, too, are doing the initial phases of migrating from Unix based UW-IMAP towards Exchange. I think I have seen something similar: UW-IMAP recipient on 'n' lists gets 'n' copies; similar Exchange recipient sees one copy. (Note the "I think" disclaimer: we haven't yet put this far enough up the priority list to investigate more fully.) So before looking at the Mailman configuration, perhaps first check the email logs (sendmail, exim, etc.) on the Mailman machine to what it is outputting towards the Exchange server: 'n' or one. If 'n', then it seems that Exchange would be conflating them; if one, then you probably need to concentrate your efforts on the Mailman machine. (My guess, and it is only a guess, is that Exchange assumes the "Message-ID" is unique and so discards duplicates. This uniqueness assumption for email is generally fine. But in the case of an email going through more than one list, with recipients in common, I think it would no longer be valid.) Hope that helps. (You might want to report back your findings for the benefit of the FAQ!) -- : David Lee I.T. Service : : Senior Systems Programmer Computer Centre : : Durham University : : http://www.dur.ac.uk/t.d.lee/ South Road : : Durham DH1 3LE : : Phone: +44 191 334 2752 U.K. : ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp
