I think it is important to understand that email never will be very secure because the standard wasn’t made with modern threat models in mind, if you want to communicate privately and anonymously, you need modern protocols like signal, i also use proton but only because I hate Google, i don’t expect my emails are any more private than they have ever been. I use email only when it is required, I use signal for private communication, overlap is impossible
I think it is important to understand that email never will be very secure because the standard wasn’t made with modern threat models in mind, if you want to communicate privately and anonymously, you need modern protocols like signal, i also use proton but only because I hate Google, i don’t expect my emails are any more private than they have ever been. I use email only when it is required, I use signal for private communication, overlap is impossible
It’s useful to minimize data leaks too, since (especially when combined with simple login etc) you can avoid giving out your real address ever.