DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a tool that helps protect email domains from being used for spam or phishing. But what does a basic, or minimum, implementation of DMARC look like? Here’s a simple explanation.

What Are the Characteristics of a Minimum DMARC Implementation?

A minimum DMARC implementation has a few key features:

  • Sends and/or receives reports at least daily: This means that the system is able to send out or receive DMARC reports every day. These reports provide important feedback about the email traffic associated with the domain.
  • Sends and/or receives reports using “mailto” URIs: A “mailto” URI is simply an email address. So, this means that the system can send reports to, or receive reports from, an email address.
  • Can handle large reports: Except in exceptional circumstances, like if resources are running low, the system can generate or accept a report up to ten megabytes in size. This is about the same size as two high-resolution photos, so it’s quite large for a text-based report.
  • If acting as a Mail Receiver, fully implements the provisions of Section 6.6: If the system is acting as a Mail Receiver (meaning it’s receiving emails on behalf of the domain), it follows all the rules set out in Section 6.6 of the DMARC specification. This section covers how to handle DMARC failures.

Remember, this is a simplified explanation. In reality, implementing DMARC involves a lot of complex processes and technologies. But hopefully, this gives you a basic understanding of what a minimum implementation looks like.

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