How do you prevent mail that you send from going to recipients whose mail is not hosted in your magical Icelandic data bunker?<p>End of the day, all of this stuff is nonsense. The only thing standing between your stuff and unauthorized access is your contract and the actions of the third party running the datacenter. The only way you can exert any meaningful control over your data is to host it yourself... as in have computers and storage that hold your stuff running in your home.<p>Even then, making a statement like &quot;I NSA-Proofed my email&quot; is either self-delusional or clueless.