Postfix – mail for example.com loops back to myself

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

You see the following error in your mail log:

Feb 24 21:42:42 mail postfix/smtp[1911]: 8172723F60:
to=<info@example.com>, relay=none, delay=0, status=bounced (mail
for example.com loops back to myself)

Source: Howtoforge Linux Howtos und Tutorials