CA1-005: CompTIA SecurityXDemo

By CompTIA · Question Mode

QuestionQ101

Security Engineering

A security engineer added a new server to the company’s email cluster. The server is associated with a new external IP address. After several days, the service desk began receiving user complaints that their outgoing messages to customers were being flagged as spam. Which of the following records should the security engineer update to resolve the issue?

Choose two
  • A DMARC
  • B CNAME
  • C MX
  • D SPF
  • E MIME
  • F PTR
Explanation

An SPF record identifies the servers and IP addresses authorized to send mail for a domain, so it must include the new outbound server’s external IP address. The new sending IP also requires a PTR record for valid reverse DNS; receiving mail systems use matching forward and reverse DNS as an anti-spam signal.

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