DMARC
Domain-based Message Authentication, Reporting and Conformance. A DNS policy that tells receivers how to handle mail that fails SPF or DKIM, with policies of none, quarantine, or reject.
Why it matters for email security
Understanding dmarc helps you build signup flows that resist fake accounts, disposable inboxes and automated abuse. VeriShield Edge operationalizes this signal as part of its transparent 0-100 fraud score.
Related concepts
Explore the full glossary or the domain directory to see these signals applied to real domains.