Defaults.Exposed › Stats › Email authentication (SPF, DKIM, DMARC)
What percent of domains self-host their email?
As of July 28, 2026 · census snapshot 2026-07-28
As of July 28, 2026, 52.84% of the 163.2 million domains with MX records in the Defaults.Exposed census point at self-hosted or unclassified mail servers rather than a recognized managed provider — 86,248,742 domains.
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Statistic current as of July 28, 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 domains self-host their email?" (as of July 28, 2026). https://defaults.exposed/stats/what-percent-of-email-is-self-hosted
Permalink:https://defaults.exposed/stats/what-percent-of-email-is-self-hosted · Machine-readable:self-hosted-email.json · Licence:open data
Methodology: how we grade the internet · Source data: defaults.exposed/data. Updated with each census edition.