We migrated from 5.5 to 2003 the only real question we have it that the
recipient policy was renamed so it would not match the system name. now the
only way to receive mail is to set up relaying so mail will not bounce back.
the question i have is can exchange 2003 be named the same as a system name?
The way the 5.5 server was set up was the same name for both.