What command can you use to connect to a mail server so that you can test SMTP?

A.
ftp

B.
nslookup

C.
telnet

D.
nbtstat

Explanation:
Section Reference: Working with Advanced TCP/IP Commands
In addition to using the telnetcommand to take control of a remote computer, you can use it to test
protocols. For example, if you type telnet <host> 25, it will connect to the server using SMTP port 25.