Signal & Syntax · Email deliverability
What Is DMARC?
DMARC is a DNS policy for mail failing SPF and DKIM alignment. The policy tells receivers to take no action, quarantine or reject.DMARC is a DNS policy for mail failing SPF and DKIM alignment. The policy tells receivers to take no action, quarantine or reject.DMARC is a DNS policy for mail failing SPF and DKIM alignment. The policy tells receivers to take no action, quarantine or reject.
Also calledDomain-based Message Authentication, Reporting and Conformance
Example
v=DMARC1; p=quarantine; rua=mailto:dmarc@acmecorp.com
DMARC in Practice
DMARC checks that the visible From domain matches a passing DMARC checks that the visible From domain matches a passing DMARC checks that the visible From domain matches a passing SPFSPF or or or DKIMDKIM domain. Receivers send aggregate reports back to the address in the record. Google and Yahoo require DMARC from bulk senders since February 2024. RFC 9989 defines DMARC, replacing RFC 7489 in 2026. domain. Receivers send aggregate reports back to the address in the record. Google and Yahoo require DMARC from bulk senders since February 2024. RFC 9989 defines DMARC, replacing RFC 7489 in 2026. domain. Receivers send aggregate reports back to the address in the record. Google and Yahoo require DMARC from bulk senders since February 2024. RFC 9989 defines DMARC, replacing RFC 7489 in 2026.
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