[Mailman-Users] Messages not departing

Barry Finkel b19141 at anl.gov
Fri Mar 12 23:03:52 CET 2010

>OK, here's what I found:
>Mar 12 10:08:11 2010 (31200) delivery to xelloss at slayers.org failed
>with code 45 0: 4.1.2 <xxx at slayers.org>: Recipient address
>rejected: Domain not found
>I've found similar messages with xxx at fanfic.net at the end.  Certainly
>mailman should be running these as bounces?

Note that the SMTP error code is "450", which is a retryable error;
it is not a permanent error.  The domain


may be one that does not exist, or it may be that at the time the mail
is queued, the relevant name servers are offline or misconfigured
so that the MTA cannot tell if the domain really exists.  The MTA and
Mailman cannot be sure.  In this case, the MTA will keep trying for the
"queue length" time in its configuration file.
Barry S. Finkel
Computing and Information Systems Division
Argonne National Laboratory          Phone:    +1 (630) 252-7277
9700 South Cass Avenue               Facsimile:+1 (630) 252-4601
Building 240, Room 5.B.8             Internet: BSFinkel at anl.gov
Argonne, IL   60439-4828             IBMMAIL:  I1004994

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