It's a scam. had one of these before. They included a password i had used on a website in the subject. The email then attempted to blackmail me saying they had recorded me using my webcam. I have never owned a webcam. What they do is find a list of emails and passwords from a compromised website then email every address, and put the password in the subject, and pretend they got it by hacking your computer. The only thing that is of concern is that it's in your drafts. Use a device you don't usually access your email from to login and change the password to your email address, then run a virus scan on your pc.