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by anthk 1402 days ago
Private tildes (public Unix machines) with a federated Usenet service do exist. For private "channels", inner mail list with GPG integrated into Mutt. Solved.

https://tilde.club/

They have Usenet, mail, IRC and some sort of local (for use inside a single a server) and federated (the message from a user it's spread across all the federation) BBS'.