I have about 6 different email accounts, mostly GMail, all set up in Apple's "Mail" program. I have been told that whichever Mail account is at the top of the Mail sidebar will be the default email when I click the Compose icon. HOWEVER, I've come to find out that emails that I've been sending to friends regarding a surprise party for my wife have been sent from my and my wife's JOINT account and at least one person replied to the email I sent out. I don't know if my wife has seen the reply yet, but I am LIVID!!!! Why would "Mail" just randomly pick which email account it is going to send something from. This is not the first time this sort of thing has happened. Mail has decided to send work stuff from my personal account, and personal stuff from my work account. Why the hell is Mail doing this? J.