For some reason one of my #mail servers is blacklisted with senderscore.org. Never heard of them. Flashy looking website which doesn't work. Can't even do a lookup there or request delisting.
How are these kind of companies even allowed to dictate who gets to deliver mail and who doesn't?
Ah, it seems their website broke down because stuff is being blocked by AdGuard. Phisy website to require all sorts of tracking...