Question

Which of the following protocol sends mails in emailing system?

• A. HTTP
• B. SMTP
• C. FTP
• D. POP / ETP

Hint:

SMTP = Send Mail.
POP3 / IMAP = Receive Mail.

Answer 1

The Correct Option is B

Concept: Email communication relies on specific network protocols. Different protocols are responsible for sending, receiving, and managing electronic mail across networks.

Step 1: Understand SMTP. SMTP stands for:
It is the standard protocol used to send email messages from a sender's mail server to a recipient's mail server.

Step 2: How email transmission works. The typical process is:

• User composes an email.

• SMTP transfers the message.

• Recipient server receives it.

• POP3 or IMAP retrieves it.
Thus SMTP handles the sending function.

Step 3: Analyze the alternatives. HTTP is used for web pages. FTP is used for file transfers. POP is primarily used for receiving emails rather than sending them. Therefore SMTP is the correct protocol for sending mail.

Step 4: Conclusion. The protocol responsible for sending emails is SMTP. Hence, option (B) is correct.