Problem with Plesk Milter (Postfix)

[SvenA]

Hello,

I have a problem when I activate Plesk milter (Postfix) in the service, I get some mails from outside.
I can not see any errors in the log files. If I stop the Plesk milter, then everything runs smoothly.
Problem is only when the automatic Update runs, then the service is reinstated. How can I figure
out why this is the number of external mails will be rejected. Can i disable the service anyway?

bg

The System:
Centos 5.9, Plesk 11.0.9 #36