I can't say whether his implementation makes sense.
Regardless, I would like to see public key encryption of all email. There's no reason why messages should be plain text anywhere except at the two ends.
I realize key management would be a problem, but it's probably a solvable problem. The solution would have to allow most people to be practically unaware of encryption issues.
Wouldn't it make spam impractical because you would all of a sudden need much more processing power to encrypt the messages (especially millions of them)?
Regardless, I would like to see public key encryption of all email. There's no reason why messages should be plain text anywhere except at the two ends.
I realize key management would be a problem, but it's probably a solvable problem. The solution would have to allow most people to be practically unaware of encryption issues.