If I understand the problem correctly, ... All of our incoming (and outgoing) Listserv mail hits our enterprise virus and junk/spam scanners first. The scanners "mark" the spam, making it easy to have a Listserv CONTENT_FILTER (for the site) eliminate them from all processing. Older versions of Listserv may not have CONTENT_FILTER. cheers, wayne Rodriguez, Pedro wrote, in part, on 12/12/2005 12:02 PM: > I keep getting junk mail in my listserv from automatically generated > e-mail accounts that do not exist. How can I prevent those to come > through this listserv? >