Unseen

"If you value privacy, security and freedom, and you are going to keep using your email to communicate then you need to start encrypting and using an overseas email provider.Unseen uses an encryption and key exchange that is not created by the National Institute of Standards in Technology (NIST). This gives a much better chance that the NSA does not have backdoor or has cracked it. They are based in Iceland which is outside of the US and EU Jurisdiction and do support having custom domain emails. Read more about their encryption here>>>


Protonmail

This email service was developed by a group from MIT and CERN. It's a secure, encrypted email using end-to-end encryption and user authentication protocols so rigorous even the creators can't read user emails. ProtonMail hosts its servers in Switzerland... so all user data is protected by strict Swiss privacy laws and allows you to encrypt messages that others can decrypt using just a password you give them.