How to disable e-mail notifications about banned IP address from Fail2Ban?
Notifications can be disabled for each jail separately in Plesk > Tools & Settings > IP Address Banning (Fail2Ban) > Jails >
<jail_name> > Change Settings. Remove from
Action section lines like:
sendmail[dest="root", sender="fail2ban", sendername="Fail2Ban", name="default"] sendmail-common[dest="root", sender="fail2ban", sendername="Fail2Ban"]
Or disable notifications server-wide by commenting out
actionban section in