You have a server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2).Windows Firewall allows the following ports on Server1:
.53
110
135
You plan to install a monitoring server on the network.
You need to ensure that the monitoring server can use Server1 to relay e-mail messages.
You install the SMTP service on Server1.
What should you do next?
A.
Install SNMP.
B.
Install the POP3 service.
C.
Create an exception for TCP port 21 in Windows Firewall.
D.
Create an exception for TCP port 25 in Windows Firewall.