Postfix on IspCP cannot send to google apps mail if it is in the same domain

In my vps setup I have ispcp omega 1.0.7 installed.

Everything works fine except the fact that postfix cannot send to google apps mail when the domain of google apps is also registered in ispcp.

Postfix sends an email to normal addresses (hotmail, yahoo, gmail etc). I use external dns.

There is also a discussion I started in the ispcp forum here

.mail.log file provides these messages:

mail for exampledomain.gr loops back to myself".
postfix/bounce: sender non-delivery notification.
postfix/qmgr: removed 

Any help would be appreciated.

Solution 1:

You cannot configure Postfix (or any other mail server) to accept mails for domain example.com and then want to send mails to another server pretending to host example.com.