Error: Postfix - mail for example.com loops back to myself

You see the following error in your mail log:

Jul 18 12:14:33 mail postfix/smtp[1911]: 8C7372CF60: to=<[email protected]>, relay=none, delay=0, status=bounced (mail for example.com loops back to myself)

Solution

Please add example.com to the mydestination line in /etc/postfix/main.cf and restart Postfix:

service postfix restart