I?ve been fighting mass mailing worms for 2 weeks now. Run removal tools from Symantec?s sight, shows nothing. Of course, you have to exclude the M: for Exchange 2000. When I run a virus scan, they show up on the M:. I?ve been running Symantec?s Intelligent Updates on a daily basis, Virus scans and manually deleting mail containing viruses on a daily basis. It seems like I may be chasing my tail.