Hi all I have a postfix 2.3.3 running on Centos 5.3. Postfix delivers mail through an authenticated smarthost based on a per user authentication. Everything works fine until some smarthost's account get blocked for some brute force attack or something. The fact is that any mail from that user who's account is blocked at the smarthost can't be delivered and is bounced back to the user with some mail delivery error as soon as postfix try to deliver it once.
My point is, how can I make this message that postfix couldn't deliver just stay around in queue for longer time and be retried everytime queue is processed, and postmaster be noticed about the problem to solve it wich is simple though the smarthost's web page. I want the end-user never gets aware of the problem. Thanks David
