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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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
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)
Thanks — short and sweet answer. Worked for me.
Fixed it finally, added in the following:
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
added $mydomain and it worked perfectly!
thanks!
Worked for Me, Thanks
Commenting out the line:
relay =
will do it too
sorry to nudge and old post, just wanted to drop a line, for webmin what worked for me was:
What domain to use in outbound mail – use hostname
Internet hostname of this mail system – myactualdomain.tld
Local internet domain name – myactualdomain.tld
in the config file it looks something like this:
mydomain = myactualdomain.tld
myhostname = myactualdomain.tld
hope this helps, worked out for me on EC2
Emails sent to Mr coded to loop back to cc sender
Thanks, solved my problem I’d had for a while