I never would've noticed, but about 25 of the e-mails failed, and went back to inbox, alerting me to the fact someone e-mailed people from my account.
I changed the password, did a sweep of the computer, no keyloggers.
I have no idea how they got into my e-mail, (instinctively erased all the e-mails, as I don't want people's e-mail addresses I don't know in my e-mail box), and now it hit me.
This is my battle.net account e-mail. Obviously, the passwords are different, but will Blizzard take action on my battle.net account because someone hacked my e-mail and sent out phishing e-mails? Is there a place at blizzard to call/e-mail to alert them?
EDIT: Upon looking, no addresses were saved, no records of them ever being added in my e-mail, etc. So I'm thinking they were sent by someone else using G-Mails send from another Address feature. o_o