I wonder if any one is able to state at least three things that Traditional Correspondence Chess actually have in common with Online Chess here.
The only similarity I can find is the amount of time it takes.
So far all I got is that no one can deal with change. I await your failure.
Well, my moves originate with me, it doesn't get to the server until I enter it into my computer and submit it, and even then it still has to make it's way to my opponent's computer, who may or may not be present to see it.
If that's not correspondence, I don't know what is.
You just described live chess and chess960 as well.