# DMARC

DMARC builds on SPF and DKIM. It requires identifier alignment with the visible from-domain and lets you publish a policy (none, quarantine, reject) while receiving aggregate reports about who sends as you.

**Why it matters:** DMARC reduces spoofing and is part of bulk-sender expectations at major mailbox providers.

**Canonical:** https://emailmarketing.sh/glossary/dmarc

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