Basic email account setup

We have upgraded our OSX server from OS 10.1 to 10.3. Out of the box we have not been successful with Postfix and sending any test emails. I am wondering if there is a checklist or tutorial for a basic OS 10.3 email setup? We think we have Server Admin and Workgroup Manager setup correctly for an email account, but we have no way of actually knowing. FYI... all of our websites operate fine with the current OS10.3.3 server configuration.