End-to-end encryption with email only works if you have the public key of the receiver. If the receiver doesn’t have a key or you don’t know it then your mail cannot be encrypted. This is independent from the email provider.
This is also the case for private chat apps like Signal. But they still work seamlessly because the key exchange is built into the protocol. The email protocols are too old and end-to-end encryption never really caught on outside of privacy focused users.
End-to-end encryption with email only works if you have the public key of the receiver. If the receiver doesn’t have a key or you don’t know it then your mail cannot be encrypted. This is independent from the email provider.
This is also the case for private chat apps like Signal. But they still work seamlessly because the key exchange is built into the protocol. The email protocols are too old and end-to-end encryption never really caught on outside of privacy focused users.