[Mailman-Users] mail forwarding loop

Mark Sapiro msapiro at value.net
Wed Oct 11 01:37:44 CEST 2006

Christopher Adams wrote:
>One subscriber is receiving all list messages,

Then I take it that other users have no trouble posting.

>but when she posts to the
>'listname' list, she gets this:
>Your message did not reach some or all of the intended recipients.
>     Subject:  MemberClicks
>     Sent:     10/9/2006 3:24 PM
>The following recipient(s) could not be reached:
>     listname at mydomain.state.or.us on 10/9/2006 2:52 PM
>           The e-mail system was unable to deliver the message, but
>did not report a specific reason.  Check the address and try again.
>If it still fails, contact your system administrator.
>           < mydomain.state.or.us #5.0.0 X-Postfix; mail forwarding
>loop for    listname at mydomain.state.or.us>
>I checked the Postfix logs and see this:
>Oct  9 14:51:37 gatsby postfix/nqmgr[2397]: C24354405E:
>from=<user at email.com>, size=5680, nrcpt=1 (queue active)
>Oct  9 14:51:37 gatsby postfix/local[21553]: C24354405E:
>to=<listname at email.com>, relay=local, delay=1,
>status=bounced (mail forwarding loop for
>listname at mydomain.state.or.us)

So the postfix log is at least consistent with the message the user

>I have been reading other information about mail forwarding errors in
>Postfix, but none of them seem to apply here. Can someone give me some
>tips as to what is happening? This is a small list and the list is not
>subscribed to itself.

Even if the list were subscribed to itself, I don't think it would
cause this since that fact wouldn't be evident until delivery of the
post from Mailman, and Mailman has loop protection (the X-BeenThere:
header) to prevent it from being sent a second time.

I think you are correct in thinking this is a Postfix question, and I
don't know the answer, but I think it must have to do with either the
one user's domain or the number or identity of relays (hence Received:
headers) that the post passes through on the way from her MUA to the

Mark Sapiro <msapiro at value.net>       The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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