I wonder which agencies and governments have access? I’m guessing bare minimum NSA, CIA, and higher level clearances at the FBI and DHS. Maybe even some of the 5 eyes countries. Definitely Mossad, that’s a given.

I’ve been considering getting Fastmail for how feature rich it is. E-mail isn’t the place for E2EE IMO, but they support using it, they just don’t provide it themselves. If I need end to end I’m using signal or only sharing keys with trusted individuals.