Just come across this. Haven’t dug too deep but sounds like an interesting opportunity. I think it can only succeed if it is fully compliant with current systems. Seems to only be mobile clients. No desktop? Are big tech going to permit this to grow? It would shut down a data mining opportunity …
Haven’t gotten through the entire protocol description yet, but so far it seems closer to DMs on a social network than digital letters.
Neat, but maybe we should just do email-over-activitypub then…
Activitypub as far as Ive understood hasnt been designed with privacy in mind.