DMARC Lookup

DMARC Lookup will list DMARC records for a domain, DMARC, which stands for Domain-based Message Authentication, Reporting & Conformance, is an email authentication, policy, and reporting protocol

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DMARC has the following high-level goals:

  • Allow Domain Owners to assert the preferred handling of authentication failures, for messages purporting to have authorship within the domain
  • Allow Domain Owners to verify their authentication deployment.
  • Reduce the amount of successfully delivered spoofed email.

DMARC policies are published by the Domain Owner, and retrieved by the Mail Receiver during the SMTP session, via the DNS. DMARC does not attempt to solve all problems with spoofed or otherwise fraudulent email.

A DMARC record is the record where the DMARC rulesets are defined. DMARC records follow the extensible tag-value syntax for DNS-based key records defined in DKIM. The DMARC record contains the policy. The DMARC record should be placed in your DNS. The TXT record name should be "" where is replaced with your actual domain name (or subdomain)

Common tags used in DMARC TXT records:

Tag Purpose Sample
v Protocol version (Mandatory) v=DMARC1
p Policy for Domain (Mandatory) p=quarantine
pct % of messages subjected to filtering (Optional) pct=20
rua Reporting URI of aggregate reports (Optional) rua=mailto:[email protected]
ruf Reporting URI of forensic Information (Optional) ruf=mailto:[email protected]
rf Format to be used for message-specific forensic information reports (optional) rf=afrf
aspf Alignment mode for SPF (optional) aspf=r
adkim Alignment mode for DKIM (Optional) adkim=r