info@blade03.ad1.auctiva.com

I recieved an 'unable to deliver' email this am. I did not open the attachement!
I never emailed this address, and it has in the sections:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TO: Thisaccount@XXX.ca, attachment: mail_bodyzip. 56k,
Body of email:
This is an automatically generated Delivery Status Notification.

SMTP_Error []
I'm afraid I wasn't able to deliver your message.
This is a permanent error; I've given up. Sorry it didn't work out.

The full mail-text and header is attached!
~~~~~~~~~~~~~~~~~~~~~~~~~~~

So, someone sending out crap using your site as a 'open me I'm safe' ploy?