I hit reply to an email that ticked me off and vented with no intention of sending, but I found out that supposedidly control M will send your email. However I tried that short cut on purporse and it didn't send, you have to hist alt then control and then M. So some how all that happened in one process. Here's a link
http://www.worldstart.com/tips/tips.php/1151
turns out that the link has some bad info, it's alt s that sends an email