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:
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 "_dmarc.yourdomain.com.
" where yourdomain.com
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 |