> These messages are normally delivery errors. If you bounce them back to > the sender, you're in fact bouncing them back to the mail system that > generated the bounce, which will either reply with another bounce or > throw them away. Only the list owner can take action by deleting the bad > address. I'm confused. I thought these bounces were caused by somebody including old mail in a new posting and failing to edit out the list headers in the old mail. I thought listserv bounced them as a loop-preventive. Why would the original sender's mail system bounce (or throw away) the bounce? Hmm. I think maybe I've just thought of the answer. Occasionally I see that particular bounce message on delivery errors not related to a sender's inclusion of unedited old list mail. I bet that's what you're talking about in your first sentence above -- although the ones I more often see are the result of negligence of a subscriber, not a messed-up system. --Natalie ([log in to unmask])