>What happens is, every time our SMTP (firewall) server is re-booted the listserver sends out the last several MONTHS worth of messages to anyone who it has ever had trouble sending to in the past ... Dave: By what means did you arrive at the conclusion that it is LISTSERV generating the duplicates vs. a broken SMTP firewall configuration? Show us a set of the distributed duplicate (just the) MESSAGE headers, if the bodies are the same. -- mailto:[log in to unmask] Tel: +1 814 863 1843 31 Shields Bldg; University Park, PA 16802-1202 USA (Please use my new e-mail address - no M/Frame mail)