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Domain-Based Message Authentication, Reporting and Conformance (DMARC) is the product of an association of major Internet companies to build upon SPF (RFC4408) and DKIM (RFC6376) to permit expression of policy around message handling, and request reports of policy transgressions, by owners of domains. For a complete protocol description and information about the association, or to learn how to participate in evolution of the protocols, visit DMARC.org.

The Trusted Domain Project has been intimately involved in the DMARC.org work since its inception and continues to be a voting member of the core group.

TDP also has a related initiative to develop an open source package to make DMARC available to sites wishing to experiment with or deploy it. Visit the initiative page for more information, or contact us (link at left) to find out about participating in or sponsoring this work.