Press kit — email infrastructure of the top 1M 2026

A daily, free-to-cite census of email infrastructure across the world's top 1 million websites, built from OpenINTEL DNS measurements. Everything below is cleared for reuse with attribution — the numbers refresh every day (latest: July 13, 2026).

Key facts

Fast facts (ready to quote)

Each sentence is self-contained and includes the snapshot date — quote as-is.

As of July 13, 2026, 658,711 of the world's top 1 million websites (Tranco list) publish MX records, 617,702 publish SPF, and 457,412 publish DMARC — per Live Direct Marketing's daily census.
Only 46.93% of DMARC-publishing domains in the top 1M actually enforce their policy (p=quarantine or p=reject); the other 51% sit at p=none, which monitors but blocks nothing.
Google Workspace and Microsoft 365 together are the mailbox provider for 38.5% of top-1M domains with MX — yet self-hosting remains the single largest category.
Amazon SES is the most-used bulk-sending ESP in the top 1M (6.21% of SPF domains), ahead of SendGrid and Mailgun.
Over the last 30 days, Self-Hosted lost the most mailbox share (-0.40 pp) while Microsoft 365 gained the most (+0.17 pp) — as of July 13, 2026.

Mailbox providers — share of top-1M MX domains

Self-Hosted
22.4%
Google Workspace
21.8%
Microsoft 365
16.7%
Unknown / Other
7.5%
Generic / unmatched (mx*.*)
2.6%
Proofpoint
1.9%

Bulk-sending ESPs — share of SPF domains

Amazon SES
6.2%
SendGrid (Twilio)
4.8%
Mailgun
4.1%
Zendesk
3.9%
Mailchimp
3.7%
Mandrill
3.4%

DMARC policy split

p=reject
25%
p=quarantine
25%
p=none (monitor only)
51%

Charts — free to embed or download

PNG (attach to email) and WebP (embed on web). Attribution + date are baked into each image. Please keep the source link when reusing.

Horizontal bar chart of mailbox-provider market share across the Tranco top 1 million websites, led by self-hosting, Google Workspace and Microsoft 365.
Mailbox-provider share across the Tranco top-1M, by domains publishing MX records (updated daily).
Horizontal bar chart of leading email service providers (ESPs) by share of SPF-publishing domains in the Tranco top 1 million, led by Amazon SES, SendGrid and Mailgun.
Top bulk-sending ESPs by share of SPF-publishing domains (updated daily).
Stacked bar chart of the DMARC policy split across the Tranco top 1 million: most domains publish DMARC but only about half enforce it with p=quarantine or p=reject.
DMARC policy split — publication versus enforcement across the Tranco top-1M (updated daily).
Diverging bar chart of the biggest 30-day gains and losses in email-provider share across the Tranco top 1 million websites.
Biggest 30-day movers in email-provider share across the Tranco top-1M (updated daily).
Funnel bar chart showing how many Tranco top-1M domains publish MX, then SPF, then DMARC, then actually enforce DMARC — a steep drop-off at each stage.
Email-authentication funnel: MX → SPF → DMARC → enforcement across the Tranco top-1M (updated daily).

Story angles

The DMARC enforcement gap

Most domains that 'have DMARC' don't actually enforce it. A ready-made hook for security and email-fraud coverage.

The Google/Microsoft duopoly — and the long tail it hides

Two vendors dominate business email, but a huge share of the internet still runs on self-hosted and regional infrastructure.

Who really sends the internet's email

The rise of developer-first ESPs (Amazon SES, SendGrid) versus classic marketing suites — measured, not guessed.

Monthly movers

Which providers are quietly gaining or losing the internet, updated daily.

How to cite

Please link to https://check.live-direct-marketing.online/email-stats/ and keep the snapshot date (shares move daily). Suggested citation:

“Email infrastructure of the Tranco top-1M,” Live Direct Marketing, 2026-07-13. https://check.live-direct-marketing.online/email-stats/

Data & downloads

Machine-readable: latest.json (KPIs + top-20 with deltas) · history.json (daily series since 2016) · ai-summary.md (prose facts) · llms.txt. Full report: email-stats home · guides: the blog.

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