I have Postfix, Dovecot and Amavis on my Ubuntu server. Recently, I get every 4 minutes a connection from IP 155.133.82.96, which appears to be Windows XP and maybe has a virus. Anyway, I found the way (after a lot of Googling) to make my Postfix not delay client access checks and I reject that IP based on a custom blacklist. However, it stays around for a while.
I want to find a more radical way to forcibly disconnect the IP when the check has finished and the IP hasn't passed it. How can I do that? (I seek a Postfix solution, not iptables or similar)
