Ron owns the domain TechPerfect.net. He often receives bounces about messages he didn’t send.
After looking at all such mails, he is sure that someone is spamming e-mails and using his domain
name. What will Ron do to ensure that his domain name is not exploited?

A.
Publish the MX record for the domain.

B.
Publish the SPF record for the domain.

C.
Publish the AAAA record for the domain.

D.
Publish the A record for the domain.

Explanation:
Sender Policy Framework (SPF) is an e-mail validation system designed to prevent e-mail spam by
tackling source address spoofing. SPF allows administrators to specify which hosts are allowed to
send e-mail from a given domain by creating a specific SPF record (or TXT record) in the public
Domain Name System (DNS). Mail exchangers then use the DNS to check whether that mail from the
given domain is being sent by a host sanctioned by that domain’s administrators.

Answer A, D, and C are incorrect. These records do not help prevent domain names from being
exploited by hackers.