I run a windows 2000 server with merak mail server. More and more (about once a day) I get a piece of mail that fouls up the system and prevents all mail on that domain from being received. The mail in question contains a virus, but the mail server has no problem with viruses (and norton removes them later so it's not an infection problem) most of the time - just ocassional ones seems to get caught up. Anyone know how I can stop this happening, as I have to go to the server and manually remove them when it happens!