Our upcoming email hosting service will not be something like Protonmail or Tuta. It will not trap you in an environment. You have the freedom of choice when it comes to email clients. You get SMTP, POP3 and IMAP. We don't need any personal details. You can pay with Bitcoin, Lightning, Litecoin and Monero and tons of other Cryptos via Trocador. We prefer Monero.

The system is fully encrypted, Webmail which will be accessible via Tor.
SMTP you can use for your self hosted apps as well.