For the past week I've had one or two mail delivery system messages from the hotmail post master each day. It shows up in my junk mail folder. The text says that a message (that I didn't send) could not be delivered. The message looks like it contains a virus. The latest one has an attachment musica-pautas.eml and is being sent to chips250@aol.com. I know I haven't sent this email.

I have scanned my completed hard drive using Norton AV and no viruses were found.

Does anyone know what this is?