I wouldn't send it, but on the other hand it sounds like you want to have your final say and be done with her forever. In that case, I'd say, figure out the most satisfying way to do that, and if it's email, so be it. If it's in person, so be it. If it's by phone, so be it. In any case, I certainly wouldn't send it with the idea in mind that upon reading this she will now see your side of things.