Which one of the following statements regarding e$-$mail protocols is NOT TRUE?

a$.$

E$-$mail clients use POP$3($Post Office Protocol version $3)$ to download incoming messages from an e$-$mail server to their local desktops.

b$.$

POP$3$ uses TCP $($Transmission Control Protocol$)$ port $121.$

c$.$

IMAP$4($Internet Message Access Protocol version $4)$ has the capability to manage messages locally yet store them on a server.

d$.$

IMAP$4$ uses TCP port $143.$

e$.$

POP$3$ is used to retrieve e$-$mail and SMTP $($Simple Mail Transfer Protocol$)$ is used to send it$.$

f$.$

SMTP uses TCP port $25.$