Matt, you might want to have your PC scanned. I got one of those as well, and it came not as a new email, but as a reply to an existing email. As in, it appears someone hit reply and sent the attachment - it had quoted the old message as well.
This means whoever sent it has access to all your Farsight email. Maybe it's something on your mail server, or maybe it's something on your work PC.
This means whoever sent it has access to all your Farsight email. Maybe it's something on your mail server, or maybe it's something on your work PC.