Originally Posted by WilliamP
Someone received an Email from me that I didn't send.
Email "From:" address spoofing is one of the easiest things in the world to do. Anyone can send an email and have their email client set to a bogus, i.e. someone else's, email address.
The thing to do is to get a full copy of the email, with all the headers intact and review where it actually may have come from.
More likely than not, they didn't access your email account to send it. While that is possible, it's not the first thing to assume until yoiu've reviewed the message.