ITPEC FE Morning April 2023 Question 45
ITPEC FE Morning April 2023 — Question 45 of 80
SMTP-AUTH — authentication mechanism used by a mail server to verify the sender.
When a sender from domain A sends an email to domain B, the sender connects to domain A's mail server via SMTP. SMTP-AUTH authenticates the sender before allowing the message to be relayed.
Why not others:
- (a) APOP — authentication for receiving mail via POP3 (challenge-response), not for sending
- (b) POP3S — POP3 over SSL, used for receiving mail, not sending
- (c) S/MIME — encrypts and signs email content (end-to-end), does not authenticate the sender to the mail server
Key rule: Sending = SMTP → authentication = SMTP-AUTH. Receiving = POP3/IMAP → APOP, POP3S.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.