>Serve out a subscriber's address??? How would that affect him on our >list and the others he is probably subscribed to on the same system? I think Jacob was looking at this from the standpoint of a user who is being spoofed onto lists but doesn't otherwise have subs on your system. You could use this solution, however, for a short period with the user's consent in order to trap a few of the messages with full headers (they would end up in the postmaster's error queue). Naturally it would inconvenience the user but the question is, how inconvenienced is he already and how much does he want this to stop? Nathan