The last couple of days I have been have some problems with messages sent to fedora lists. I have had messages show up multiple times. I am getting a temporary failure (deferral) and a message suggesting that some sort of duplicate detection is being triggered. My log has the following:
deferral: Connected_to_66.187.233.32_but_connection_died.Possible_duplicate!(#4.4.2)/

Since the messages are showing up multiple times on the list, I suspect that despite the temporary failure, the message is being delivered. If that is the case, then a success status should be returned, not a temporary failure. And even if the message wasn't being delivered, I would have expected a permanent failure, as the duplicate status shouldn't change.

I am not sure what starts this process. I do have occasional network congestion, so that it could be that a message gets accepted, by my server doesn't see the success status. However, once it does start, I need to manually remove the messages from the queue as it will take a couple of days for the server to give up on them.

Here is the sample headers for one such message so that you can look at the server logs on your side to see what might be happening:
Return-Path: fedora-devel-list-bounces@redhat.com
Delivered-To: bruno@wolff.to
Received: (qmail 24686 invoked from network); 23 Nov 2007 09:01:08 -0000
Received: from unknown (HELO hormel.redhat.com) (209.132.177.30)
by wolff.to with SMTP; 23 Nov 2007 09:01:08 -0000
Received: from listman.util.phx.redhat.com (listman.util.phx.redhat.com [10.8.4.110])
by hormel.redhat.com (Postfix) with ESMTP
id 5F3D673B99; Fri, 23 Nov 2007 04:01:07 -0500 (EST)
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[172.16.52.254])
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lAN912x8016965 for fedora-devel-list@listman.util.phx.redhat.com;
Fri, 23 Nov 2007 04:01:02 -0500
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Date: Thu, 22 Nov 2007 08:13:40 -0600
From: Bruno Wolff III bruno@wolff.to
To: Richard Hally rhally@mindspring.com
Message-ID: 20071122141340.GA2857@wolff.to
References: 20071120140550.GA20367@dspnet.fr.eu.org
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