Free online tool
DMARC Checker
Inspect public DMARC policy, alignment, reporting tags, and percentage settings.
Your result will appear here.
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DNS Toolkit
Look up A, AAAA, CNAME, MX, TXT, NS, CAA, and SOA records with available TTLs.
DNS Propagation Checker
Compare Cloudflare and Google Public DNS observations. Resolver disagreement can reflect normal caching.
SPF Checker
Inspect SPF policies, syntax, include recursion, and DNS lookup limits without sending email.