DMARC diagnostics now support RFC 9989 (DMARCbis)

Diagnosis result page showing the tab controls to switch between the two specifications

DMARC diagnostics now evaluate policy discovery and alignment using RFC 9989, the updated DMARC specification published in May 2026 (formerly known as DMARCbis).

RFC 9989 replaces the Public Suffix List-based method from the legacy RFC 7489 with DNS Tree Walk and the new psd tag. This changes how the Organizational Domain is determined, which can affect:

Which DMARC policy applies to the email.
Whether SPF and DKIM pass relaxed alignment.
The overall DMARC result.

Diagnosis results now include RFC 9989 and RFC 7489 tabs, allowing you to evaluate the same email using either specification and compare the results. RFC 7489 is obsolete, but this comparison remains useful while mail receivers gradually adopt RFC 9989.

With this update, DMARCwise now fully supports the new DMARC specification across DMARC records, reports, Hosted DMARC, and diagnostics.

Learn more about DMARCwise support for RFC 9989–9991 in our documentation page.

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