Get rid of spam with this one simple trick~

For future reference: a great way to see the hosts sending the most spam emails in the last month.

Assumes spam email is either manually tagged on sight or automatically classified (rspamd/SpamAssassin?) and then appropriately marked so that the tagging script for notmuch correctly tags it.

notmuch search --output=files tag:spam AND date:last.month.. | xargs grep -m 1 -h "^Received:" | sort | uniq -c | sort -rn

Then just put the record holders into your nftables firewall and sleep soundly. And yes, there are record holders in my spam folder! Some spammers are apparently so dumb they set up (or take over?) one email host and just blast their worthless junk out. Maybe I should start blasting back abuse complaints to their ISPs~