Brutkey

Delta Chat
@delta@chaos.social

Signal and Matrix were founded in popular opposition to the email system but End-to-End encrypted instant messaging via emails works now, and reliably, with #deltachat V2 app releases, and with #chatmail relays forming a growing secure email network that minimizes metadata and enforces TLS and E2EE messaging.

You can't really argue with working code, can you?

Contrary to popular belief SMTP and DKIM and IMAP are no holy ingredients and can be improved upon btw. See eg
https://github.com/chatmail/relay/issues/487