Comment by lesser23
Fastmail these days with a custom domain.
I was on protonmail for years. But I found the integrations were not compatible with my ideal workflow. Their iPhone app also crashed all the time for me and you can’t use regular mail clients. For PCs you can use the bridge with a client but I found nothing like that for the phone.
WRT proton I think it was overkill for my use case. If I need complete secrecy I can use GPG over email.
I find Fastmail to be cheaper, faster, and more compatible for every day use. I also really like the email alias feature which I use all the time. Fastmail and a standalone VPN was significantly cheaper than protons offerings as well.
At the end of the day as long as you use a custom domain it doesn’t really matter where you go. Even Gmail works fine here. To me it just matters where you will compromise on usability for secrecy.
The additional secrecy features provided by Proton seem like a waste of time when the bulk of your mail is exchanged with (and stored by) Microsoft and Google users.