I am trying to have Exchange 5.5 act as a Post Office for SMTP mail. The objective is the get a new company to have the same email address as headquarters without changing the email systems. They use CC Mail with a SMTP gateway. Their addresses right now are someone@zz.mycompany.com and we want them to be someone@mycompany.com, with that being the reply address as well. The only connection is through the internet. How should the IMC be setup and what information, besides email address names, is needed from the cc mail server? Thanks for your help!