SMTP pop3 routing

Hey Folks,

We have two Static IP addresses, one is via AT&T and the second one, which we just installed, is via Time Warner Cable.

The problem is we’re getting an error message due to the fact that all of our stations are smtp.sbcglobal.net, the email eventually gets out though but you can see my dilemma.

So the question is: What do we have to do so that all emails get routed through sbcglobal only?

Running Windows 2003 Server, XP and Vista Stations using Outlook.

Peace
Elemental