Hello All, We have exchange 2000 and I use the ISP for relaying all mails.=20 Now I would like to block all incoming mails from the account = xyz@xxxxxxxxxxxxxxx from delivering any mails to any account on my = domain.=20 Can some one please guide me. I have added the addresses to the list of = reject email from in the message delivery folder which says filter = messages claiming to be from field. But that has no effect on the = settings so far.=20 Does using the ISP for relaying mails stop me from filtering mails. Please inform me what more I need to do.