By andrewl85
I set up an SMTP server on a CentOS 7 droplet. Emails are successfully being sent to Gmail accounts, but they are failing to send to my G Suite email accounts.
Successful email:
Jan 1 13:35:48 Production postfix/smtp[2869]: E5B653FDBA: to=personal_email_address@gmail.com, relay=gmail-smtp-in.l.google.com[209.85.144.27]:25, delay=877, delays=876/0.02/0.31/0.25, dsn=2.0.0, status=sent (250 2.0.0 OK 1483295748 k58si25466087qta.76 - gsmtp)
Failed email:
Jan 1 13:35:48 Production postfix/lmtp[2871]: E5B653FDBA: to=root@example.com, orig_to=support@example.com, relay=none, delay=876, delays=876/0.02/0.02/0, dsn=4.4.1, status=deferred (connect to example.com[/var/lib/imap/socket/lmtp]: No such file or directory) Jan 1 13:35:48 Production postfix/smtp[2869]: connect to gmail-smtp-in.l.google.com[2607:f8b0:400d:c0e::1b]:25: Network is unreachable
I replaced my domain name with example.com above.
I was able to fix the “Network is unreachable” by opening /etc/postfix/main.cf and setting the following:
inet_protocols = ipv4
However, the other error is still present, and emails are still failing to send to my domain accounts:
Jan 1 17:22:38 Production postfix/lmtp[4066]: 9EC3E3FE3C: to=root@example.com, orig_to=support@example.com, relay=none, delay=1104, delays=1104/0.03/0.01/0, dsn=4.4.1, status=deferred (connect to example.com[/var/lib/imap/socket/lmtp]: No such file or directory)
Why is Postfix able to send emails to all domains except the one that it’s running from? How can this be fixed?
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Since the hostname of the server matches the domain, it tries to deliver locally instead. Turn it off.
Thanks for responding, but what exactly do I turn off? Are you referring to a certain setting in the main.cf file?
I think I figured it out. I opened /etc/postfix/main.cf file and changed this line:
mydestination = $myhostname, localhost
to:
mydestination = localhost
Then I ran ‘service postfix restart’ to restart Postfix. It’s sending emails to my domain now. Thanks for your help!
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