[kazinator]

An idea it is, but not an original idea.

By the time you properly deal with the spam and legal stuff, you're on your way to cloning Hotmail. (Gmail, if you do a better job of it.)

What, those are not anonymous, you say? Yes they are, to a degree; anyone can make "fake" throwaway addresses with the free online mail services. The inconvenience of having to register (as opposed to just filling in a form and clicking Send) reduces abuse. These services also don't promise anonymity to anyone; do something illegal an they will reveal to the authorities your IP address and all access logs pertaining to it.

(Are these hidnchat guys willing to provide anonymity assurances greater than that?)