I posted a few days ago about how 21.co's Linked-In killer, which was basically Spam Proof email with a form of internet (bitcoin) postage. I thought they really hit the nail on the head. But only now I realize the true potential.

Email hacking is obviously a big problem these days. The problem is that the email has to go through a third party that is vulnerable to hacks. Need I say more … ?

What better way to store your email on the blockchain. That ONLY you with your private key can read? Doesn't that basically make email unhackable ?