I just put a stop to a mail loop that was going on between our LISTSERV and one of our other machines. Here's the list header: * * NHLBI NHBPEP Coordinating Committee * * Review= Private Subscription= By_Owner Send= Editor * Notify= Yes Reply-To= Sender,Respect Files= No * X-Tags= Yes Stats= Normal,Owner Ack= Yes * Errors-To= Owners Validate= Store Only Mail-Via= Dist2 * Filter= Also,*@NIHFAX * Notebook= Yes,E,Monthly,Public * Default-Options= Repro,ShortBSMTP * * [log in to unmask] (xxxxxxx xxxxxxxx) * Owner= [log in to unmask] (xxxxxxx xxxxxxxx) * Owner= [log in to unmask] (xx xxxxxxxx) <-- bad userid * [log in to unmask] (xxxxxxx xxxxxxxx) * [log in to unmask]@CU.NIH.GOV (xx xxxxxxxx) <-- 2 @s * (Userids changed to protect the guilty.) I noted two problems with the Owner and Editor field above, plus there are are spaces missing after the equal signs in 3 cases. The loop started when a message sent to the list bounced. As the list is Safe= No, the message was sent back to the list name. It was identified as a delivery error and sent to the list owners. The bad owner userid bounced and the bounce message went back to the list, rather than to [log in to unmask] Apparently the envelope MAIL FROM was the listname, rather than LISTSERV. I've seen bad owner addresses before, but never one that resulted in a loop this way. Roger Fajman Telephone: +1 301 402 4265 National Institutes of Health BITNET: RAF@NIHCU Bethesda, Maryland, USA Internet: [log in to unmask] Postmaster for CU.NIH.GOV/NIHCU, LIST.NIH.GOV/NIHLIST, NIH3PLUS