Count queued messages: # postqueue - p | grep "Requests" To flush the mail queue: # postfix flush OR # postfix -f To see mail queue, enter: # mailq To remove all mail from the queue, enter: # postsuper -d ALL To remove all mails in the deferred queue, enter: # postsuper -d ALL deferred Reading message content on postfix queue: # postcat -q MESSAGE_ID
Postfix log:
/var/log/maillog