OS X mail - how to create email address

We have a Apple OS X file and email server. We bought a new Apple server and will move email out from the current server.

I need to create email accounts on the new OS X server, I create user accounts in Workgroup Manager and select Mail -> Enabled.

But when I goto the Server Admin -> Mail , the account name (under maintenance) is still blank. The manuals say nothing!

This must be the simplest answer because how complicated can creating a new email account be?!?! I am totally new to Apple OS X.  The new email server is a standalone Directory server.

Thanks
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