Where are log files for roundcube and squirrelmail? (file2ban)

Hi! I try to setup file2ban but squirrelmail and roundcube not working

and ist rigt if i set dovecot, postfix, postfix-sasl log file destination to var/log/mail.log?

because default settings is not working and get errors.

I have installed latest virtualmin on Ubuntu Server 16.04.1 LTS

Or where i can find with almost reccommended settings some tutorial how to configure file2an.

I have made from my old server webmin configuration file backup but i dont know what i must choose if i wish only recover my file2ban settings?

Thnx for helping!