We have rebooted mail, see Freemail[0] and I2PBote[1].

[0] http://freenetproject.org/freemail.html

[1] http://i2pbote.i2p.us/

It works. Freenet has Freemail[0]. I'd like to bring attention to I2PBote[1] too.

Both of these solutions are distributed, encrypted entirely (even metadata) and solve email's privacy problems.

[0] http://freenetproject.org/freemail.html

[1] http://i2pbote.i2p.us/