mail for domain loops back to myself

Issue

• postfix complains mail for domain.com loops back to myself
• Sample logs

Sep 19 06:09:23 localhost.localdomain postfix/smtp[1315]: 4017B287D133: to=<root@example.com>, relay=none, delay=26, delays=26/0.01/0/0, dsn=5.4.6, status=bounced (mail for example.com loops back to myself)
Mar 31 09:23:26 host postfix/qmgr[6692]: 6CCB534A3C11: from=<root@example.com>, size=933, nrcpt=1 (queue active)
Mar 31 09:23:26 host postfix/error[2536]: 9E64C33723DF: to=<root@example.com>, relay=none, delay=42421, delays=41910/512/0/0.01, dsn=4.3.5, status=deferred (delivery temporarily suspended: mail for relay.example.com loops back to myself)