Marker Seven was recently inquired about an issue with a client's email account regarding spam email. The client's email account has seemingly been sending out spam mail, only to be bounced back into their own inbox as a delivery failure notice. However, no outgoing messages of the sort were found in the sent or in the outbox. After receiving an example delivery failure email and doing some research, Marker Seven has identified the problem and recommended a course of action to reduce the number of spam emails our client will receive in their inbox .