Hi, I'm running WK Active Directory, with Exchange 5.5SP4. I have 2 domain names registered with the mx part of those domains pointing to the external IP of our ISA2000 Server. The e-mail from 1 domain works fine, this is the domain I used while setting up the exchange server. I've set up the indivdual users extra email address of the 2nd domain name. What do I need to do to enable the second domain name to work? Do I need to set up some sort of Virtual SMTP Server? Can you help. Thanks Jim Plummer Systems Engineer