A Company Is Hosting a Windows Email Server on Its

Multiple Choice

A company is hosting a Windows email server on its premises. Company policy is to use encryption on incoming an outgoing email services. An administrator recently upgraded the company's firewall. Users report they can receive email, but no one can send email. Which of the following ports should the administrator open on the new firewall?

A) 21
B) 80
C) 389
D) 465