Postfix mail for domain.com loops back to myself Error and Solution

Posted on in Categories , , , , , , , , last updated June 2, 2009

I can send and receive mail using [email protected], but system generated emails such as [email protected] bounce backup with an error:

May 1 03:14:52 mail postfix/smtp[62798]: 23CA4BD6B40: to=, relay=none, delay=0.01, delays=0/0/0/0, dsn=5.4.6, status=bounced (mail for mail.example.com loops back to myself)

How do I fix this error?