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

I can send and receive mail using user@example.com, but system generated emails such as root@mail.example.com 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?

Postfix did found a dns reply to your email server, but it hasn't been configured to deal with address such as root@mail.example.com. In other words, your server is configured to accept user@example.com but not as user@mail.example.com. This is well known config problem with virtual domain. To fix this error either add system FQDN to mydestination or relay_domains. Postfix accepts mail for domain listed in virtual_mailbox_domains, virtual_alias_domains, and domains that resolve to IP addresses listed in inet_interfaces and proxy_interfaces. Update mydestination using postconf or by editing main.cf file:

mydestination = localhost.$mydomain, localhost, mail.example.com

Once done reload postfix:
# service postfix reload

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{ 2 comments… read them below or add one }

1 Andrés Chandía October 26, 2009 at 8:40 pm: I’ve done it but does not works for me, this is what i got:
at /etc/postfix/main.cf
myhostname = example.tdl
myorigin = /etc/mailname
mydestination = example.tdl, localhost, localhost.localdomain
at /etc/mailname
example.tdl
at /etc/hostname
example.tdl
2 zazuge December 5, 2012 at 1:39 pm: another cause is when you have too mail servers with same hostname
it happened for me
watch out for “greeted me with my own hostname”
@Andrés Chandía
i don’t think that is a FQDN
I proper FQDN is “myhost.mydomain.com.”
or even “myhost.mysubdomain.mydomain.com.”
though it depends if the trailing dot is inluded or not
the important thing is that if you do a ping or nslookup
you get your host (the mail server)
from anywhere in the interenet (the FQDN must be unique)

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

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