2022-04-26 UTC
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@HongPong if you are wondering about #indieweb #peertube #Mastodon #pixelfed see
ActivityPub a specification for federated servers accounts interfaces. any software could implement these type of mailboxes. Federated Social Web protocol from W3C working group
https://www.w3.org/TR/activitypub/ (twitter.com/_/status/1518797995189448705)