Here's a fun one to watch out for! Yesterday morning I noticed that the mailer @SAU.EDU was reflecting mail to the address in the RFC822 To: line. List postings with ShortBSMTP headers were being sent right back to the list with the only change being in the Received: lines. No big problem since they were being detected as duplicates. The original poster was being pestered but... Now it gets interesting. One of the subscribers @SAU.EDU had the DIGEST option set, and back it came to the list. But apparantly there is no checksum in PERMVARS for digests so it wasn't deemed a duplicate. The digest was posted to the list and of course included in the accumulation of the digest for the new day. The From: line said [log in to unmask] but that wasn't caught by TRAPIN even though TRAPIN contains LISTSERV@*. There's probably a good reason for that that I don't know. I stopped the loop by deleting *@*.SAU.EDU from all lists and adding *@SAUNIX.SAU.EDU and *@SAU.EDU to TRAPIN so they couldn't re-subscribe. Now for the suggestion box: Put checksums in PERMVARS for Digests and Indices so they won't be accepted for posting. Glenn A. Malling (NETMAN@SUVM) or [log in to unmask] Syracuse University Computing Services +1 (315) 443-4111 Machinery Hall Syracuse, New York 13244-1260