Secure and Private Email Without Accounts or Domains
Ubikom is free, open-source email framework based on the concept of Self-Sovereign Identity. You own your identity (which, in this case, means your private key), and all the outgoing and incoming messages are encrypted and signed by default.
Ubikom uses Bitcoin-style Elliptic Curve Cryptography. In fact, Ubikom keys are identical to Bitcoin keys.
It doesn't spy on you, because you don't give away any private information, the only thing known to others is your public key and your identifier (basically your email address). Your messages cannot be decrypted by anyone but you.
To send and receive messages, you use any standard email client, such as Mozilla Thunderbird, iOS Mail, or any other client that supports SMTP and POP3. Encryption and decryption is done on the fly by the proxy (which you can also run yourself, if you like).
Eventually, the public key registry will be decentralized so that it's not controlled by any single party.
If you want to give it a try, you can start on this page by choosing your email identifier below.
Let's Reinvent Email
Currently in beta testing. Things are not stable just yet, act accordingly.
How to configure email client
GitHub repo: github.com/regnull/ubikom (developers are welcome to contribute).
On twitter: @UbikomProject (yes, using Twitter does strike us as ironic).