>But we still use door locks, An Email is not analogous to a house, it's more akin to a tent, or a lean-to; A simple solution to a simple problem. Tent: How c

>But we still use door locks, An Email is not analogous to a house, it's more akin to a tent, or a lean-to; A simple solution to a simple problem. Tent: How can we build a serviceable shelter that can be quickly un/packed, built, and costs next to nothing? Email: How can we enable everyone to send messages to everyone else with as little inconvenience as possible? Both solutions solve the stated problem, and that's it. If I want a secure shelter, a tent alone will not suffice, I have to build a ditch&wall around it. Similarly, if I want secure communication, I have to encrypt the message before sending it via Email. SMTP is not made to be secure, because that's not the problem domain it concerns itself with.