Fun Fact:

"When you use email, you are typically using a client built on top of a communication protocol called Simple Mail Transfer Protocol or “SMTP”. As a user, you don’t need to interact with the technical details of SMTP directly; you just need to know how to use your webmail client app of choice, like Gmail for example, and let it handle the technical details for you.

SMTP, being a public domain communication protocol, is owned by no one."

oh, Like what Nostr is trying to be, interesting comparison