I searched and didn't see an existing Feature Request for this, but may have missed something...
Is it feasible/possible to add a function in postfixadmin that would temporarily lock out a user account after a configured number of AUTH attempt failures within a specifid time period?
For example, consider a hack attempt on a specific users account - I'd like to be able to lock out a users account for, say, 5 minutes, after 3 failed AUTH attempts. So, after 3 failed attempts (bad password, any attempt to log in to that users account gets a TEMPFAIL for 5 minutes, then it will allow up to 3 more tries.
Even better would be a way to lock it out permanently after 3 failed cycles on the same day.
Anyway, not sure this is doable in postfixadmin, but it sure would add a large extra layer of security.
Or... does anyone know if this is possible with fail2ban already?