> that your city's utilities company did not serve you while Protonmail did.

That's fair- that's a better way of saying it. Every time I've had to email them (which admittedly has only been a handful of times) with proof of something, I always end up calling them up and they'll say "but protonmail isn't on the blacklist that IT posted, so you're lying or you sent it to the wrong place," then I'll send screenshots from a different email provider proving that I sent the protonmail email(s) to the right place, then they'll say "oh, I promise to talk to IT to get this straightened out."

It's pretty obnoxious.