Let me explain what I did:
I made a web mail account for a sub domain.
and then just followed the installer (choose domain, create directory, name, and left the imap and smtp as defaulted)
I could not connect to the server...
uninstalled, and tried it again with mail.subdomain-name.com in both imap and stmp. This seemed better but, still did not work.
What port #s and imap / smtp settings should I be using?
Jeff