Which of the following protocols is used to send messages to the e-mail server for relaying?
A)Simple Mail Transfer Protocol (SMTP)
B)Post Office Protocol, version 3 (POP3)
C)Internet Control Message Protocol (ICMP)
D)Internet Message Access Protocol, version 4 (IMAP4)

Question

Quizplus · Accepted Answer

SMTP is a text-based protocol used to send messages to a mail server for relaying. The mail sender communicates with the mail receiver by issuing simple command strings and supplying necessary data over a TCP connection.
Key Takeaway: SMTP, unlike POP or IMAP, is a delivery protocol, not a retrieval protocol. It cannot pull messages from a remote server on demand. POP and IMAP are specifically designed for retrieving messages and managing mailboxes.

Which of the Following Protocols Is Used to Send Messages