Hi! On this thread 7c/fakefilter#73 some random user asks to block ProtonMail and SimpleLogin email domains. This is really popular filter, so please, take measures! @mmso, @bartbutler, @Twikito
Hah, there's also seznam.cz (meaning "a list") - I wouldn't be surprised if more then half of whole Czech Republic (so ~6M) uses that as their primary mail provider.
It's also a main local web search and maps provider among other stuff, and pretty popular with non-english speaking part of the population.
If the maintainer accepts this they would be most probably killing the project, can't imagine people using it when it drops their user registration by a lot because of blocklists this wide.
Same for Poland - wp.pl and o2.pl are the most used email providers over here. Most of my family have a wp.pl email, nobody uses gmail or anything else.