About one week ago, LISTSERV@POLYGRAF began having a problem with Ack:'s. I have a local redistribution for the Internet TCP-IP list, and here is what used to happen ( I split the long line for clarity... ): 13 Dec 1989 10:57:20 Processing mail from [log in to unmask] for TCP-IP 13 Dec 1989 10:57:25 Mailing created 1 outbound files (1 local copies) for 2 recipients. This is fine. On that day one person deciced to sign-off the list. Here is a section of console after this: 13 Dec 1989 17:19:36 Processing mail from [log in to unmask] for TCP-IP 13 Dec 1989 17:19:41 Mailing created 0 outbound files (1 local copies) for 1 recipients. 13 Dec 1989 17:19:55 Sent information mail to [log in to unmask] This is not fine. For some reason it is now sending an Acknowledgement to the contributor. This Acknowledgement looks like: Statistics for TCP-IP mailing (TCP-IP Redistribution List): -> Only local users and domain-style recipients on the list. This has caused two things: 1. Some bounced mail coming back to LISTSERV from Ack:'s that could not get delivered. LISTSERV detects these and sends them to me ( nice job! ). 2. Mail from angry TCP-IP contributors who got the Ack:'s from LISTSERV and think someone should be shot. :-) By the way, in the header of this list I have "Ack= Msg". I could change it to "No", but "Msg" has been working fine for over a year. If someone could provide some illumination here (perhaps only Eric?) I would appreciate it. Tony Monteiro Asst. Director ( and proud LISTSERV owner! ) Computing Services Polytechnic University