Ann, an External User, Has Received Several Calls from a Company

Multiple Choice

Ann, an external user, has received several calls from a company asking why she has been sending the company communications with internal users' names in the "from field". Ann calls a technician and explains she has not been sending any communications and would like this issue fixed. The technician investigates and determines the PC is not infected with any viruses or malware. Which of the following should the technician check NEXT?

A) Hijacked email
B) DNS entries
C) Hosts file
D) POP3 errors