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DDMARC
The DDMARC Research Desk
Original, public-data studies

Original research.

Independent DNS scans of the public internet's email-authentication posture — methodology published, aggregates only, re-run annually.

  1. 2026 edition

    Beyond DMARC: The State of the Modern Email Security Stack (2026)

    SPF and DMARC are going mainstream. MTA-STS, TLS-RPT, and BIMI are not — and almost nobody runs the complete stack. An original DNS scan of the Tranco top 10,000.

    Tranco snapshot JZ2VY · 2026-07-01 · n=8,907

    0.7%

One edition so far — this scan re-runs annually. Future editions will list here, interlinked.