I’ve been using protonmail as my email host for probably 4-5 years now and I have been less than impressed on many occasions. For one, their iOS app sucks and

I’ve been using protonmail as my email host for probably 4-5 years now and I have been less than impressed on many occasions. For one, their iOS app sucks and has a ton of UI bugs. For two, they offer an SMTP bridge app that you can host on your own machine to use their service with an SMTP client, but it randomly logs you out and forces you to re-enter your password (on the server side, not the client side) to keep using your email.