Trying to leave gmail because they are evil.
Folks had said protonmail, but it doesn't work with the native IOs mail app, so it's out. I need to sync a bunch of email accounts in one location, so I need to use the iPhone mail app to pull them all together.
I have been using RADIO.FM (or RADIO.AM) for many years. A bit slow, but it cost like $35/year.
As far as I can tell, they independent and small enough that, they probably fly under most scrutiny weather.
I've never once heard them mentioned or reviewed in, probably 15 years of using them.
It is really just a dumb webmail system. It really is all you need.