I have 2 domains with separate IP subnets (192.168.1.X and 192.168.5.X) Both have their own Exchange 2003 mail servers.
I have a Cisco PIX T515 with an interface for each network. Gateway for 1.X = 1.1 gateway for 5.X = 5.1
-My Exchange server 2003 users on the 1.X have no problems emailing anybody in the world including recipients on the 5.X network.
-My Exchange Server 2003 users on the 5.X can email anybody in the world EXCEPT users in my 1.X domain.
Is this an Exchange DNS problem or a PIX routing issue?
My 5.X users need to be able to email the 1.X users.