DMARC (Domain-based Message Authentication, Reporting and Conformance) is an email authentication protocol designed to combat email-based attacks such as spoofing and phishing. DMARC Aggregate Reports provide statistical data on DMARC compliance for a specific domain, which can be used by domain owners or their authorized representatives to assess DMARC effectiveness.


   DMARC Aggregate Reports contain a variety of data points, including email volume, authentication results, and policy compliance. This information can be used to evaluate DMARC policies, monitor the health of the email ecosystem, and identify potential sources of unauthorized email.


   The email volume information in DMARC Aggregate Reports is broken down by sender and receiver, providing insight into email traffic for a given domain. Authentication results are broken down by mechanism, such as SPF or DKIM, and indicate the percentage of emails that passed or failed DMARC checks. Policy compliance information is broken down by action taken, such as quarantine or reject, and indicates the percentage of emails that comply with the domain's DMARC policy.


   DMARC Aggregate Reports are an important asset for domain owners looking to improve email security and protect against email-based attacks. By regularly reviewing DMARC Aggregate Reports, domain owners can identify potential issues and take appropriate steps to address them, ultimately improving the overall security and reliability of their email communications.