Before you point me to Google or serverfault search I want to tell you that I've searched a lot, did some "fixes". They didn't help.
I have ISPConfig 3 installed on Ubuntu 12.04 LTS Server
The server has several domains and lets call
the main domain: example.com. I have also demo.com
I have several emails on each domain.
The status of
the email sent between
the emails:
[email protected] -
[email protected] (Success)
[email protected] -
[email protected] (Failure)
The failure is with error:
postfix/pipe[31311]: 8E72ED058D: to=<
[email protected]>, relay=dovecot, delay=0.1, delays=0.03/0/0/0.07, dsn=5.1.1, status=bounced (user unknown)
I saw
the fix for removing
the example.com from:
mydestination = localhost, localhost.localdomain in /etc/postfix/main.cf
It didn't help.
Also an important thing is that
the example.com MX records are Google's. We are using Google Apps for this domain in order to use Gmail servers.
I think
the problem is that
the mail server is not looking for
the MX records of
the domain. It knows
the domain is set on this server and it searches for
the destination email on
the local server, not on Google's servers.
For several days I'm really lost!
Thanks for your help in advance!