The latest e-mail worm disguises itself as a message from online payment service PayPal. MiMail.j (w32.mimail.j@mm) is the ninth variant of the MiMail virus family and could compromise your security online. The e-mail states that your PayPal account is about to expire and asks that you update your credit card number along with other sensitive information, such as your mother’s maiden name. It does not infect Linux, Mac, or Unix OSs.
See details here (from CNET Reviews)