Definition
A DNS policy that tells receivers what to do with mail that fails SPF or DKIM, and sends you reports. It ties authentication together and guards against spoofing.
Glossary
DMARC
A DNS policy that tells receivers what to do with mail that fails SPF or DKIM, and sends you reports. It ties authentication together and guards against spoofing.
Related terms
- SPFSender Policy Framework, a DNS record listing which servers may send email for your domain. Receivers check it to confirm mail is authorised.
- DKIMDomainKeys Identified Mail, a cryptographic signature on your emails that proves they came from your domain and were not altered in transit.
- Domain reputationThe reputation tied to your sending domain. It follows the domain across providers and is rebuilt slowly, so it must be protected.
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