Nethserver-fail2ban needs testers

I would prefer enable it by default, but as you find probably you can set it to disabled, look after db properties. In fact I have many emails in the admin mailbox, you can sort them by thunderbird or directly by sieve and sogo/roundcube/.... (the best solution).
Each email is dropped to a folder, sorted by the topic, and like this you can still have error emails dropped in the Inbox master folder. I think it is one way to catch the attention if something goes wrong.