We use the built in exchange filtering quite heavily to block the tons of garbage email we get. Adding 5-10 new filters every day is a pain, but its worth it in the long run. yesterday I received a new group of junk mails from a source labeled as.. [%%email.addr%%] How do I add this kind of completely invalid email address to the filter list... and isn't exchange supposed to weed this invalid garbage out anyway? There is no @ sign in the address so I have no idea how to label it in the filter list. Thanks