Unfortunately do not use proton, but general consensus about compatibility works just fine without proton. Subdomains, to me, seem like a super easy way to identify someone - I’m going to be the only person using “abc.simplelogin.com”, basically the same as if I was using my real email.

Currently, since no one is talking about Firefox Relay, I’m between either Anonaddy or Simplelogin. They seem pretty similar according to the couple comments here.

Thank you for the feedback!

Duckduckgo has started this too. Very annoying.

Edit: just realised this post was from 3 years ago… I don’t know why this popped up lol.