Lavabit was not set up like that because Lavabit could not be set up like that. You cannot have webmail that works like that; at best, you have a client that i

Lavabit was not set up like that because Lavabit could not be set up like that. You cannot have webmail that works like that; at best, you have a client that is delivered via the web, but then why not just run the client locally? Basically, if you want encryption to be local, then you do not want an encryption service. Which is exactly what you should be doing anyway; privacy and security are not services.