Glossary: Endpoint, Application and Email Security
DMARC tags (sp=, np=, t=)
Also written: sp=, np=, t=, pct=
Extra DMARC record tags: sp= sets a policy for subdomains, np= sets one for subdomains that don't exist, and t= (testing) replaced the old pct= tag in the May 2026 update (RFC 9989).
Where the book teaches it
Related terms
DMARC (Domain-based Message Authentication, Reporting, and Conformance)DMARC policy (p=none, p=quarantine, p=reject)rua=