Mail queue problem

[bsungur]

Hi everyone, we use Mac OS X Server 10.6, it's been a while, every sent email goes to queue and waits there. When i restart the server all emails send.

How can i prevent this situation? And what may the problem be?

P.S: I try "postfix flush" and email stil wait in queue.

[till]

Any errors in the mail log file? Do you use a spam scanning software like amavis?

[bsungur]

there is no error in our log file, and yes wen use amavis.