I have never used postfix admin, but it might be more helpful if you posted your config.inc.php and we'll see if we can't help.

Configure IT Quick: Set up a basic e-mail server with Postfix as the MTA Your email has been sent For all the apparent simplicity of e-mail, setting up a mail server is one of the most difficult ...

I'm trying to set up a SuSE Linux mail server to provide SMTP for our organization, as well as providing IMAP mailboxes for selected individuals. I am attempting to get Postfix and Cyrus running, but ...