Blocking Exim DOS/mail bombs

Following on from last week’s w00tw00t block, here’s another quick fail2ban rule, this time to handle some Exim DOS/mail bombing problems. I already use Fail2Ban to block unauthorised users who attempt to use my mail server as a relay to send spam, and this works very well. Recently, I’ve started seeing messages like this one … Continue reading Blocking Exim DOS/mail bombs