ITPEC FE Morning April 2021 Question 43
ITPEC FE Morning April 2021 — Question 43 of 80
Sender Policy Framework (SPF) — DNS-based email authentication that verifies the sender's IP.
SPF allows domain owners to publish a DNS record listing authorized mail server IPs. The receiving server checks if the sender's IP matches the SPF record and accepts or rejects accordingly.
Why not others:
- (a) — describes an organizational PR policy, not a technical protocol
- (b) — describes the problem (spoofing), not the defense mechanism
- (d) — describes targeted email delivery, unrelated to sender authentication
Key rule: SPF = DNS record that maps domain → authorized sender IPs. It fights email spoofing by letting receivers verify the sender.
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