I never said there should be a lookup system. Where are you seeing that? I said there isn't one and people still manage to get by. The other commenter was suggesting looking up addresses was some sort of problem. I'm saying it's a non-issue. If not having a public name-to-email lookup was a show stopper, then we would not be having this discussion because email would not be popular. People get by just fine without lookup. They exchange addresses and store addresses on their own.

Discussion is great. But you have to read carefully to understand what's being said. (If I am not being clear, then I apologize.) But if your mind is closed then there's no point reading what I'm typing because I am not regurgitating the usual ideas on email.

Anwyay, discussion is irrelevent when juxtaposed against running code. I'm interested in stuff that works more than getting approval from people in online forums.

This is not some new thing. Anyone can use email this way now. We all have good connections and bandwidth. There is no need for store and forward. What has stood in the way of using email as direct communication is people who can only see email being used one way: daemons that accept commands from any connection, spoofed IP's and all, and email as a service run by someone else, not a small program on the client's machine. If it was impossible to authenticate connections based on any other means besides real-time challenge-response, or DNS run by someone else, then how would people manage to run ssh daemons without the same problems as email?