There were no errors in the mail logs. The mail.err file was and is 0 bytes. The mail.log file just contains the following that repeats every 5 minutes...
Code:
Apr 27 06:25:01 host imapd: Connection, ip=[::ffff:127.0.0.1]
Apr 27 06:25:01 host imapd: Disconnected, ip=[::ffff:127.0.0.1], time=0
Apr 27 06:25:01 host pop3d: Connection, ip=[::ffff:127.0.0.1]
Apr 27 06:25:01 host pop3d: Disconnected, ip=[::ffff:127.0.0.1]
Apr 27 06:25:01 host postfix/smtpd[394]: connect from localhost.localdomain[127.0.0.1]
Apr 27 06:25:01 host postfix/smtpd[394]: lost connection after CONNECT from localhost.localdomain[127.0.0.1]
Apr 27 06:25:01 host postfix/smtpd[394]: disconnect from localhost.localdomain[127.0.0.1]
My ISP I relay thru deleted an old VALIAS file last night and the original error went away. So he apparently still had something intercepting even though the domain should have been completely deleted there.
Now my emails get rejected as 'unknown user'. I can still send them but can't receive them, still no errors in the logs.