Setting up DNS to go to Microsoft Exchange

[jcoulter]

I've searched the forums and found several threads on how to set up DNS so mail can be delivered to an external server. BUT, each one gives conflicting advice and I'd like to get a clear idea of how to proceed.

We have domain.com set up through Plesk running on a linux system with an IP address of [1.2.3.4]. We have Microsoft Exchange set up on a Windows 2003 Server with an IP address of [4.3.2.1].

What do I need to do in Plesk's DNS setting so that email is sent and received through Microsoft Exchange?

Do I need to set anything special up in Microsoft Exchange?

Thanks !!