S/MIME is (somehow) the defacto of email encryption/digital signing and gigantic players like apple mail, outlook do support it as well. Other more recent and much better solution is mailfence.com which provides both OpenPGP and S/MIME compatibility.
Protonmail needs to take that into account as well.
S/MIME is (somehow) the defacto of email encryption/digital signing and gigantic players like apple mail, outlook do support it as well. Other more recent and much better solution is mailfence.com which provides both OpenPGP and S/MIME compatibility.
Protonmail needs to take that into account as well.