[nine_k]

Is email p2p? Can you configure multiple relays like MX records for email? Can a receiver be its own relay?

Relays are important for two reasons: peer discovery and communicating when one of the parties is offline. Same as with other p2p networks.

[bawolff]

I mean, the pure P2P solution would be supernodes.

Edit: i RTFA. Sounds like relays can be run by anyone. That sounds p2p enough to me.