I found a notification that an Email "Couldn't send attachment" at 12:59am this AM. All it does when you click it is open up my empty Outbox. However I do find the empty sent Email in my Gmail sent folder...... I ran Malwarebytes, and did not find a thing. Any place else I could look at to see what was Emailing on it's own? All I can think of is something that I was trying to (or accidentally) send earlier perhaps, and simply got stuck in the outbox.