More generally, I see this a lot from Microsoft Exchange users.
There is an obscure anomaly for which users who set the "vacation"
notice feature will cause all messages that have collected since the
notice was set to be resubmitted the moment they login when they get
back from "vacation".
It's pretty easy to detect if you log message-ids of received messages.
This is what I do. Can you say "looping storm"? You only need this to
happen once, on a b-i-g list, to understand why I remove with prejudice
any subscriber who submits duplicate messages.
You can also find them when the envelope from does not match the message
The resubmitted message will look exactly like the original except that
it will have more Received lines and the envelope from will be the
person with the broken mail system.
James M. Galvin <firstname.lastname@example.org>
On Sat, 15 Jun 2002, Byron Lunz wrote:
Date: Sat, 15 Jun 2002 08:17:18 -0700
From: Byron Lunz <email@example.com>
Subject: re-appearing old mail?
Is anyone else seeing the re-appearance of old messages on discussion lists
(or just old messages re-appearing in their inbox)?
I've had a couple of listowners question why old messages, seen 4 or 5 days
ago, suddenly reappeared on their lists. Upon investigation, the only
common element I noticed was that each such message had numerous Received:
headers, one of which was from rr.com. Examples from three different messages:
Received: from mail6.nc.rr.com (fe6.southeast.rr.com [18.104.22.168])
Received: from mail8.nc.rr.com (fe8.southeast.rr.com [22.214.171.124])
Received: from mail6.nc.rr.com [126.96.36.199] by mail.darron.net with
It looks to me like one or more rr.com mail servers are regurgitating old
messages, which then are treated as new posts upon arrival at our
mailserver. Is anyone else seeing this problem or know for sure the source
of these mails?
DataBack Systems LLC