Defaults.Exposed › Stats › Email authentication (SPF, DKIM, DMARC)
What percent of .com domains have DMARC?
As of August 16, 2026 · census snapshot 2026-08-16
As of August 16, 2026, 19.0% of the 179 million graded .com domains publish a DMARC record — 34,042,517 domains. Only 8.9% of .com domains enforce it (p=quarantine or p=reject); 81.0% have no DMARC record at all.
Scoped to the .com zone as measured by the census. Aggregate figures only — no individual domain is named or graded.
How this number is measured
It comes from the Defaults.Exposed census — a full pass over the public DNS, mail and TLS configuration of every domain we can resolve, not a sample or a panel. Each domain is checked directly, one result per domain, and a check that cannot be determined is recorded as undetermined rather than counted as a failure. The figure above is recomputed from that raw evidence for every edition, so it moves when the internet moves, not when we re-word the page.
Snapshot 2026-08-16 · the full grading methodology · the underlying dataset, published open with the counts behind every percentage. If a figure here disagrees with one elsewhere on the site, the dataset is canonical and we would like to know.
Cite this
Statistic current as of August 16, 2026. Recomputed from the live census each edition; the number on this page and the machine-readable twin always match. Please cite Defaults.Exposed and link this page.
Defaults.Exposed, "What percent of .com domains have DMARC?" (as of August 16, 2026). https://defaults.exposed/stats/what-percent-of-com-domains-have-dmarc
Permalink:https://defaults.exposed/stats/what-percent-of-com-domains-have-dmarc · Machine-readable:/stats/s/com-dmarc.json · Licence:open data
Methodology: how we grade the internet · Source data: defaults.exposed/data. Updated with each census edition.