Posteo

Also based in Germany, Posteo has been around for a decade and also offers end-to-end encryption on your emails. However, Posteo takes user privacy to the next level. It automatically strips the IP addresses from emails, so anyone monitoring your email traffic can't see the location from which you are sending your email-nor the location from where the emails you receive are being sent. But Posteo goes even further. It allows you to pay for an email account in the normal ways: credit or debit card or even via PayPal. However, you can also send cash in the mail, which ensures your email account leaves no digital trail to you. While this option is probably only needed by journalists and activists working in countries run by oppressive governments, it goes to show just how seriously Posteo takes your privacy.