I just started using 'fail2ban" and have not figured out how to create a
custom filter.

I am running Postfix-3.0.1 on a FreeBSD 10.1 system. My mail-log is filling up
with entries like this:

Jun 19 06:29:40 scorpio postfix/smtpd[45535]: warning: hostname
abts-mum-static-025.109.170.122.airtelbroadband.in does not resolve to
address 122.170.109.25: hostname nor servname provided, or not known

That is all on one line, although it is shown wrapped here.

"fail2ban" is not catching this. I need to create a rule that would catch
"hostname nor servname provided, or not known" or ""address <IP>: hostname
nor servname provided, or not known" for it but I am not sure exactly how. I
would appreciate it if someone could assist me.

Thanks!

-- 
Carmel

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