CISCO 300-720 Securing Email with Cisco Email Security Appliance (SESA) 05 24Oct2024 - Practice Quiz

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Question 1 of 30

In a corporate environment, an organization has implemented DKIM (DomainKeys Identified Mail) to enhance email security and prevent email spoofing. The IT team is tasked with configuring DKIM for their domain, which involves generating a public-private key pair. The public key will be published in the DNS records, while the private key will be used by the mail server to sign outgoing emails. If the organization sends an email that is signed with the private key, what is the process that the receiving mail server should follow to verify the authenticity of the email, and what implications does this have for email integrity and sender authenticity?

The receiving mail server retrieves the public key from the DNS records, uses it to verify the signature on the email, and confirms that the email has not been altered during transmission, thereby ensuring both integrity and authenticity.

The receiving mail server checks the email headers for the DKIM signature but does not verify it against the public key, assuming the email is authentic based on the sender's reputation.

The receiving mail server generates its own public-private key pair to sign the email and sends a request to the sender for verification, which delays the email delivery.

The receiving mail server discards the email if the DKIM signature is present but does not match the sender's domain, regardless of the content of the email.

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