FQN Outlook n Postfix Issue

[grungy]

I upgraded my server to newest trunk and mail sending works fine with thunderbird, but some of my clients use outlook and they have a problem with sending. I installed outlook and indeed there is a problem, I get the following message:

Code:

504 5.5.2 <GRUNGY>: Helo command rejected: need fully-qualified hostname

Well I took the main.cf postfix conf file from an older trunk, now sending works....