For the last 2 days, one particular email (~20MB) is constantly being sent from an internal address to a yahoo account. At first, I attempted deleting the email from the queue with an NDR. Now the email does not appear in the queue, however using wireshark, I can see that this email is still being attempted. I have restarted services as well as restarted the server to no avail. I also do not see this email under the mailroot folders.
I am unsure how I may remove this email. It is consuming precious upload bandwidth. Thank you for any assistance.