Just to clarify - filter is actually at massive disadvantage compared to the public relays because we do not see the network fingerprint of the spammer. It should be considerably easier for the relays directly facing the spam.
Discussion
But I am kinda dumb. I have no clue how to do that with my present relays.
Nonsense! Not intelligence of course, just some networking know how and time spent in the trenches fighting script kiddies in my other projects hahaha.
Do you have a public relay that’s currently being spammed? Perhaps I could look at it.