IP drop list

[Hardy Flor]

fail2ban blocked dynamically addresses for a period of time. It has a 
module for dovecot.

> I wonder if there is an easy way to provide dovecot a flat text file 
> of ipv4 #'s which should be ignored or dropped?
>
> I have accumulated 45,000+ IPs which routinely try dictionary and 
> 12345678 password attempts. The file is too big to create firewall 
> drops, and I don't want to compile with wrappers *if* dovecot has an 
> easy ability to do this. If dovecot could parse a flat text file of 
> IPs and drop connections it would sure put a dent in these attempts.