CompTIA CySA+ (CS0-003) — Question 95

An email hosting provider added a new data center with new public IP addresses. Which of the following most likely needs to be updated to ensure emails from the new data center do not get blocked by spam filters?

Answer options

• A. DKIM
• B. SPF
• C. SMTP
• D. DMARC

Correct answer: B

Explanation

The correct answer is B, SPF, as it specifies which IP addresses are authorized to send emails on behalf of a domain. If the new data center's IP addresses are not included in the SPF record, emails sent from them may be rejected or marked as spam. DKIM, SMTP, and DMARC serve other functions related to email authentication and delivery but do not directly authorize IP addresses for sending emails.