It stopped working during the server change. It worked fine till then. I turned it off for a while till the change was complete and it didn't work since then.
I don't know if these menus are the same for your version or not but here goes nothing. These same settings worked for me using my address and login...
Tools->Options
Getting Started
Real Name: (your name)
Return address: [email protected]
Mail server (incoming): mail.xibase.com
Login name: [email protected]
SMTP server (outgoing): mail.xibase.com
[x] Allow authentication (checked)
Never could get it to work using xibase as the SMTP. I switched the SMTP to my regular and it worked fine. Until the server change. Now I get the username/password mismatch. But the password works fine using webmail.