I've had a strange incident with several of my larger lists and AOL subscribers, namely, numerous AOL subscribers have appeared on the auto-delete "Monitoring report" with error counts and durations far exceeding my limits. None were ever deleted. Before you jump to conclusions, I'm all too familiar with the false alarm addresses (reported error address not being in the subscriber list) but these WERE 100% MATCHES. I'm at a loss to figure this one out. Errors from other sources are auto-del'ing as they should. The returned errors are 550 Mailbox not found. The only hypothesis I can offer is that all but one of the AOL addresses that are failing are in mixed case (the username part). This was one of the first times I have seen Listserv-parseable AOL addresses appearing like this, so I presume they changed their mailer. Is there a case sensitive issue here? I can't think of another explanation, other than I've just had a very extraordinary co-incidence. Jeff Kell <[log in to unmask]>