Whats in the body of the email?
Contact Rob via PM first anyway, to make sure.
If he didn't send a email to you, I wouldn't be surprised if it's the mysterious virus email going around. I've had several virus attached emails from email addresses I recongise, in which the owners didn't actually send.
There was also another member on here sometime ago warning us that if any of us recieved an email from his email address, it wasn't actually him.