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A security analyst reviews a SIEM alert related to a suspicious email and wants to verify the authenticity of the message: SPF = PASS DKIM = FAIL DMARC = FAIL Which of the following did the analyst most likely discover?
Correct Answer: B
The SPF = PASS result confirms the email came from an authorized server, but DKIM = FAIL indicates the message was not properly signed with the expected DomainKeys Identified Mail (DKIM) signature. DMARC = FAIL suggests that because DKIM failed, the overall email authentication failed. This scenario is consistent with a legitimate server sending an unsigned email.