Research
Email authentication adoption, measured from public DNS.
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DMARC adoption in the Tranco top 10,000: October 2026
We scanned the Tranco top 10,000 for DMARC: 60.4% of mail domains enforce, 22.0% sit at p=none, and 30.9% of p=none domains get no reports.
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DMARC in US public school districts, by state: October 2026
A DNS scan of US public school districts on 14 October 2026: 40.3% of districts with mail enforce DMARC, and 59.7% do not. Results by state.