On Apr 12, 2006, at 6:10 PM, Michelle Wilbers wrote: > I understand what you are saying, but this problem occurs when *any* > subscriber posts to the list, not just one. From what my > subscribers are > reporting, this happens with every post to the list. I first > checked to be > sure the list was not subscribed to itself. I also considered a > subscriber > might have a forward setup that was sending list posts back to the > list > address. But that would only explain one such incident, like your > misconfigured header idea, and not how this happens with every > post, from > every subscriber. > > The log entries I previously copied to this list were made by > different > subscribers. I have a copy of the logs from that entire day, and > with every > post, the duplicate error message was sent out. So, what the > subscribers are > reporting is, in fact, occuring. > > Any ideas? Yes, do what Pete Weiss said. The problem is most likely that one of the list's subscribers is reflecting its postings back to the list either because of a misconfiguration on the part of the subscriber or the subscriber's mail transport agent. This situation would impact all subscribers.