Thank you! I was thinking about MTUA, mail, crypto/privacy and bitsync yesterday and was wondering if there could be a new mail system that would be encrypted

Thank you! I was thinking about MTUA, mail, crypto/privacy and bitsync yesterday and was wondering if there could be a new mail system that would be encrypted and decentralized by default (à la bitsync/bittorrent). Bitmessage seems to closely match what I had in mind.