ProtonMail
Signed up for Proton Mail public beta today. The are based in Switzerland and all ProtonMail to ProtonMail emails are automatically encrypted. You can also encrypt, or not encrypt, email you send to a, say, Gmail account but the recipient needs to know a password you assigned them in order to decrypt it. When you sign in you have a username and two passwords. One password for your regular sign-in and a second password to decrypt the message date. ProtonMail mail never have access to the second password, or at least claim so.