> Why not? On most major hosts it has a special meaning So at best you can special case for those "major hosts" and not apply such treatment to any other domai

> Why not? On most major hosts it has a special meaning So at best you can special case for those "major hosts" and not apply such treatment to any other domain. The RFCs for email don't say "uhh dude whatever, just check what gmail does and maybe hotmail too lol". You are playing fast and loose with these things.