I’m running Exchange Server 2007. I have users that also have email accounts with Gmail. (firstname.lastname@example.org), these are working fine. However, when I try to send a message from email@example.com to an firstname.lastname@example.org, my server reply’s with the following error:
“#554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ##“
So what’s happening is Exchange is not letting the message leave the domain. The alias accounts work fine from outside the domain.
Any ideas? Thanks.