I have thousands of emails queued outbound all from an email address of email@example.com to an email address called firstname.lastname@example.org. They are not coming in from the Internet as far as I can see. The subject indicates hidden. I don't know where they are coming from. If you check, you will see that the Domain bankname.com does not have an MX record associated with it. Wierdess thing is, when I do message tracking on these addresses in Exchange, I see nothing!! I tried to create a Sender Filter blocking the sender email address and then configured the smtp virtual server accordingly but they are still queueing up. I did a virus scan and found nothing. This has been going on for weeks but there were never more than a dozen message queued up and I did not have time to investigate it. Now, its thousands. Why are they not showing up in message tracking?