Hello !
I'm using the new 17.5.3'er of Onyx, and found this :
At the fail2ban jails, here are my settings for the " plesk-postfix " jail :
[plesk-postfix]
enabled = true
filter = postfix-sasl
action = iptables-multiport[name="plesk-postfix", port="smtp,smtps,submission"]
logpath =...