Because the icons for Reply and Send are so similar, I have on a number of occasions, after being distracted, clicked send thinking I was clicking reply, resulting in an email being sent that I haven't yet replied to. Is there a setting in preferences that will tell the program not to send, or at least ask, if no alterations to the body or headers has been detected? Obviously I have looked for such a setting, but I don't see anything that looks like it would do such a thing.