I would simply block the IP at my firewall and be done with it.

From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Jason
Sent: Wednesday, June 08, 2016 11:35 AM
To: postfix-users@postfix.org
Subject: Forcibly disconnect spammers


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)

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