I have an Ensim server, linux 7.3.
I'm getting hundreds of spam emails each minute from some asian ip: 184.108.40.206 and several other 211.63.136 ip numbers.
My spam filter is blocking these based on the ip, but there are so many connections that it is getting overwhelmed and other emails end up either delayed or not getting through.
Is there a way to have the server refuse connections from 211.63.136 ? So this never even reaches the spam filter?
If so, how do I go about it?