This is a common worm virus out there today. It is just using your e-mail address to generate a official looking message. A common example of this is:
Dear user of "Mmorpg.com" mailing system,
Your e-mail account has been temporary disabled because of unauthorized access.
For details see the attached file.
The Management,
The MMORPG.com team http://www.mmorpg.com
These messages are not from us...they are a "spoofed" message appearing to come from us. If you check the mail headers you can see this. Please delete these e-mails immediately and do NOT open the attachment.