As to the original question, it works exactly like E-mail but with a bonus.
After the mail is sent, it goes to your outbox. Once it is READ BY THE RECIPIENT it goes on to the sentbox.
This way you know for a FACT they got and read it
Cheers for the info guys regarding the Original question
Just wanted to know why it sat in the outbox and not in the sentbox.
Sorry to the Mods for any greif that may have come off the back end of it though