# DMARC

A policy telling receivers what to do with mail that fails SPF and DKIM.

**Source:** “a scalable mechanism by which a mail-originating” [RFC 7489: Domain-based Message Authentication, Reporting, and Conformance (DMARC)](https://www.rfc-editor.org/rfc/rfc7489)

See also: [DKIM](/reference/glossary/dkim), [SPF](/reference/glossary/spf), [Bulk sender](/reference/glossary/bulk-sender), [Spam rate](/reference/glossary/spam-rate).

---

Published 2026-10-29. Web page: https://www.mackenziebowes.com/reference/glossary/dmarc