Aligned authentication
01A successful authentication must align with the Author Domain.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 4.4 ↗
RFC 9989 · § 4.4EXAMPLE
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03
Apply alignment
A successful unrelated domain cannot authenticate this Author Domain.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
RFC 7489DMARC domain policy
This revision replaces the earlier public-suffix-list approach with a DNS tree walk and incorporates public-suffix-domain policy handling. Aggregate and failure reporting move to companion RFCs.
Read the updated RFC section ↗Either an aligned DKIM pass or an aligned SPF pass is sufficient.
- Either an aligned DKIM pass or an aligned SPF pass is sufficient.
- Relaxed alignment compares Organizational Domains; strict requires identical domains.
- Domain comparisons are case-insensitive.
Examples are illustrative. Read the exact policy, reporting, and privacy rules in the linked current specification.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
Privacy