trying out new bogon filter

So in the category of Things I Should Have Done Ages Ago, as a replacement for the bogon filtering I used to do (now useless due to the IPv4 address space being fully assigned), I'm now using the Spamhaus DROP and EDROP lists, which is their list of IP addresses that are ownz0red by Various Annoying People, which, in theory, my ISP should already be blocking, but evidently they're not -- counters show roughly 40 connection attempts in the past 2 days; most likely entirely to my mail server.

Meaning if, within the last few days you've suddenly found yourself unable to connect, that would be something to check (because that's a list you really don't want to be on).