Which of the following is MOST likely causing the program?

A user is not receiving emails on a laptop. A technician is able to send emails using the local client, however no new emails are being received. The POP3 and SMTP settings in the corporate email configuration look correct. The technician notices a new antivirus program was installed on the machine recently.

Which of the following is MOST likely causing the program?
A . The POP3 port is being blocked
B . The email password stored is incorrect
C . The user needs to enable TLS
D . The user is not connected to the internet

Answer: A