Domain-based Message Authentication, Reporting and Conformance (DMARC) enhances which protocols?

Domain-based Message Authentication, Reporting and Conformance (DMARC) is designed to enhance email authentication protocols by providing a framework that works alongside Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM). DMARC builds on the existing capabilities of SPF and DKIM by allowing domain owners to publish policies in their DNS records that inform receiving mail servers how to handle messages that fail authentication checks.

When DMARC is implemented, it ensures that both SPF and DKIM are utilized effectively to verify the legitimacy of the sender’s domain. The combination of these protocols allows for a more robust approach to email security by not only verifying that the emails are coming from legitimate sources but also giving domain owners the ability to receive feedback about failed authentication attempts and the handling of their emails.

Other options do not reflect the correct enhancement of protocols. For example, while DKIM is certainly involved, stating that DMARC enhances only DKIM does not capture the broader applicability of DMARC alongside SPF. Similarly, terms like spam and bounce management do not pertain directly to the function of DMARC in enhancing email authentication protocols. Therefore, the focus on SPF and DKIM accurately underscores the role of DMARC in improving the security and reliability of email communications.