Netfilter and Dovecot

orlandoamador

I started using mailcow-docker 3 weeks ago.

Looking at the netfilter log, I can see that it is blocking “SASL LOGIN authentication failed” attempts, which is good for me.
On the dovecote, I can see invalid user login attempts. Does Netfilter cover that?

ETNyx

Log as admin go System > Configuration > Options > Fail2ban > Open Regex filters and test your log against those patterns if nothing fit you can add one by yourself, or maybe raise an request on github whit your filter if you consider it to be good for every one.