I'm with thayne above on this one.. Protonmail just offers secure storage on their system but they still see the external incoming emails unless they're PGP enc

I'm with thayne above on this one.. Protonmail just offers secure storage on their system but they still see the external incoming emails unless they're PGP encrypted. They make that easy, but still. PGP didn't take off in 30 years, it's just too complex. Tools can help that but the weak point is its key management.