No, please don't, here is one voice against "let's do it totally different for idiots". Next you want to have 3 confirmation dialogs "do you really want to send" followed by "did you prove-read your mail again?" followed by "you clicked YES too fast, go back to start and prove-read again".
Also, worst thing you actually can do is to put the save/send/ok button on the bottom when all other UI elements are on the top of the UI (which is usually the case in mail clients).
Also, worst thing you actually can do is to put the save/send/ok button on the bottom when all other UI elements are on the top of the UI (which is usually the case in mail clients).