I'd like to see a critique of the actual Dark Mail protocol. From the Kickstarter video it seems clear they're aware of the tradeoffs of a Lavabit style system,

I'd like to see a critique of the actual Dark Mail protocol. From the Kickstarter video it seems clear they're aware of the tradeoffs of a Lavabit style system, and are starting with a true end-to-end encryption protocol, with the option to "dial down" the security when necessary.