All incoming and outgoing mails stay in the mail queue

All incoming and outgoing mails stay in the mail queue.
Error in logs is:
postfix/smtp[8979]: C5FBF40165: to=, relay=127.0.0.1[127.0.0.1]:10024, delay=0.13, delays=0.1/0.02/0/0, dsn=4.4.2, status=deferred (lost connection with 127.0.0.1[127.0.0.1] while receiving the initial server greeting)
If I disable CSF it works fine
If I disable Amavis in master.cf it works fine.
All mails which comes from an email account of the server to a internal email account are delivered without problems.
Server is not blacklisted

Please help

Thanks