Let’s get straight to the case. I have a server, serving a web services and someone was trying to use my server for sending a spam mail.
Honestly, i am not an expert at this. So i struggling and do some research until i found some article which is quite interesting and try to implement it on to my server.
The result so far was good, i am quite satisfied. And here, i am gonna share it with you guys.
As i already mentioned above, i am not an expert on this field. Thus, I BEAR NO RESPONSIBILITY if something occurs to your server when you follow this guide. If by any chance you found this page and know what to do, then it’s good. However, if you also same like me, think again and DO IT WITH YOUR OWN RISK.
1. Modify or create /etc/fail2ban/filter.d/postfix-sasl.conf