What is the primary purpose of the Sender Policy Framework (SPF)?

To verify that the sending server is authorized by the domain in the envelope sender

To encrypt the contents of an email message

To provide a digital signature that proves the message was not altered

To tell receiving servers what to do with messages that fail authentication

You are reviewing an email that failed SPF. The Authentication-Results header shows 'spf=fail (sender is not authorized)' with smtp.mailfrom=example.com. What does this mean?

The email was sent from a server that is listed in example.com's SPF record.

The email's DKIM signature is invalid.

The email's From header is not aligned with the envelope sender.

The sending IP is not listed in example.com's SPF record.

Your organization is implementing email authentication to reduce phishing. You need to ensure that emails sent from your domain are verified and that receiving servers can enforce a policy for unauthenticated messages. Which combination of protocols should you implement?

SPF, DKIM, and DMARC, with DMARC policy set to quarantine or reject.

SPF and DKIM only, because DMARC is optional.

SPF only, because it is the most widely supported.

DMARC only, because it covers both SPF and DKIM.

Your organization wants to prevent attackers from spoofing your domain in emails sent to external recipients. You have already published SPF and DKIM records. What additional step is necessary to enforce a policy on receiving servers?

Configure your mail server to reject emails from unknown senders.

Add more IP addresses to the SPF record.

Use a third-party email service to send all emails.

Publish a DMARC record with a policy of quarantine or reject.

EC-CouncilDigital Forensics Essentials

Domain 6Objective 4

Email Header Analysis and Authentication DFE Practice Questions (Page 4)

Part of the Dark Web and Email Forensics domain, which makes up ~16% of our current practice bank.

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Questions 16–20

16foundation · easy
What is the primary purpose of the Sender Policy Framework (SPF)?
Select an answer first
17application · medium
You are reviewing an email that failed SPF. The Authentication-Results header shows 'spf=fail (sender is not authorized)' with smtp.mailfrom=example.com. What does this mean?
Select an answer first
18foundation · easy
Which header field, when it appears with a value that does not match the domain in the From header, is a potential sign of spoofing?
Select an answer first
19application · medium
Your organization is implementing email authentication to reduce phishing. You need to ensure that emails sent from your domain are verified and that receiving servers can enforce a policy for unauthenticated messages. Which combination of protocols should you implement?
Select an answer first
20application · medium
Your organization wants to prevent attackers from spoofing your domain in emails sent to external recipients. You have already published SPF and DKIM records. What additional step is necessary to enforce a policy on receiving servers?
Select an answer first

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