"Peter M. Weiss" <[log in to unmask]> wrote: > Most LISTSERV lists' definitions retain the default LISTSERV > feature of PREVENTING the sending of duplicate messages. Yes, our lists do prevent duplicates. Fortunately, though we are getting blamed by a substantial group of subscribers, it appears not to be Listserv causing this directly. Unfortunately this makes it harder to fix. > Once upon a time there was a problem here on PSUVM where > duplicates were being sent, but it did not only involve LISTSERV, > but user-generated e-mail too. It had to do with (as I recall) > reordering of SMTP queues at the worst possible time. It's hard for me to say if user generated mail is involved, as I don't know how to send a test case through there. This past night it happened again. When the Digests went at midnight, those that passed through tigger.cc.uic.edu on their way to someplace else multiplied into several copies. It's also happening with individual pieces of list mail that go through tigger, though it seems to be worse with the digest mail that gets sent out at midnight. I've heard from a couple of other list owners, so it's not just our group of lists. I'm just hoping that when the folks at UIC get back to work (just about now) they will understand about SMTP queues. I wrote to the postmaster at tigger, but I don't know how fast they'll respond. Insights as to what can cause multiplication of messages for several days in a row continue to be welcome. Vickie Banks H-NET Technical Assistance [log in to unmask]