Just one more update.
I have no idea the cause of this problem, but after I delete all emails in deferred queue ([root@ ~] deferred = to see emails in deferred queue) and restarted server, emails are working again.
I am checking to try to identify the real cause of that, but no news at now.
I have no idea the cause of this problem, but after I delete all emails in deferred queue ([root@ ~] deferred = to see emails in deferred queue) and restarted server, emails are working again.
I am checking to try to identify the real cause of that, but no news at now.