DMARC
A DNS policy that tells receivers what to do when SPF or DKIM fail.
Published January 15, 2026 · By RAPID SMTP
DMARC ties SPF/DKIM identity together and asks receivers to quarantine or reject misaligned mail. It also unlocks aggregate reports about who is sending on your behalf.
Related terms
- SPF (Sender Policy Framework)A DNS record that lists which servers are allowed to send mail for your domain.
- DKIM (DomainKeys Identified Mail)A cryptographic signature added to every outbound email that proves it came from your domain.
- DeliverabilityThe probability that your email lands in the inbox rather than spam.