# Email infrastructure of the Tranco top-1M — plain-text summary

Source: https://check.live-direct-marketing.online/email-stats/ — a daily census of email infrastructure across the top one million
websites (Tranco list), built from OpenINTEL forward-DNS measurements by Live Direct
Marketing. Report date: 2026-07-13. Cite freely with a link to the source page.

## Headline facts

According to Live Direct Marketing's daily Tranco top-1M scan (2026-07-13), 658,711 of the top one million domains publish MX records,
617,702 publish SPF, and 457,412 publish a DMARC record.

According to Live Direct Marketing's daily Tranco top-1M scan (2026-07-13), only 46.9% of DMARC-publishing domains actually enforce their policy
(p=quarantine or p=reject), down 0.41 percentage points over the last 30 days.


## Classification coverage

According to Live Direct Marketing's daily Tranco top-1M scan (2026-07-13), named mailbox vendors account for 65.54% of
MX-publishing domains, 22.44% are classified as self-hosted,
and 12.02% remain unresolved or generic.

The SPF sender dictionary classifies 82.56% of all include
occurrences; 72.28% of domains with SPF includes
have every include classified. The remaining long tail contains
79,716 unique include targets.


## Top mailbox providers (share of MX-publishing domains, 2026-07-13)

- Self-Hosted: 22.44% of MX-publishing domains as of 2026-07-13 (-0.40 pp over 30 days).
- Google Workspace: 21.78% of MX-publishing domains as of 2026-07-13 (+0.16 pp over 30 days).
- Microsoft 365: 16.74% of MX-publishing domains as of 2026-07-13 (+0.17 pp over 30 days).
- Unknown / Other: 7.54% of MX-publishing domains as of 2026-07-13 (-0.28 pp over 30 days).
- Generic / unmatched (mx*.*): 2.57% of MX-publishing domains as of 2026-07-13 (-0.16 pp over 30 days).
- Proofpoint: 1.90% of MX-publishing domains as of 2026-07-13 (-0.03 pp over 30 days).
- Generic / unmatched (mail.*): 1.75% of MX-publishing domains as of 2026-07-13 (+0.04 pp over 30 days).
- Yandex 360: 1.64% of MX-publishing domains as of 2026-07-13 (-0.03 pp over 30 days).
- Cloudflare Email Routing: 1.60% of MX-publishing domains as of 2026-07-13 (+0.04 pp over 30 days).
- Mimecast: 1.52% of MX-publishing domains as of 2026-07-13 (-0.03 pp over 30 days).

## Top email service providers / ESPs (share of SPF-publishing domains, 2026-07-13)

- Amazon SES: 6.21% of SPF-publishing domains as of 2026-07-13 (+0.03 pp over 30 days).
- SendGrid (Twilio): 4.76% of SPF-publishing domains as of 2026-07-13 (+0.01 pp over 30 days).
- Mailgun: 4.11% of SPF-publishing domains as of 2026-07-13 (+0.04 pp over 30 days).
- Zendesk: 3.86% of SPF-publishing domains as of 2026-07-13 (-0.01 pp over 30 days).
- Mailchimp: 3.69% of SPF-publishing domains as of 2026-07-13 (+0.03 pp over 30 days).
- Mandrill: 3.36% of SPF-publishing domains as of 2026-07-13 (-0.01 pp over 30 days).
- HubSpot: 3.18% of SPF-publishing domains as of 2026-07-13 (+0.01 pp over 30 days).
- Salesforce: 2.62% of SPF-publishing domains as of 2026-07-13 (-0.01 pp over 30 days).
- Mailjet (Sinch): 2.13% of SPF-publishing domains as of 2026-07-13 (+0.03 pp over 30 days).
- Cloudflare Email Routing: 1.80% of SPF-publishing domains as of 2026-07-13 (+0.04 pp over 30 days).

## Top SaaS senders (share of SPF-publishing domains, 2026-07-13)

- Shopify: 0.87% of SPF-publishing domains as of 2026-07-13 (+0.06 pp over 30 days).
- Pardot (Salesforce): 0.79% of SPF-publishing domains as of 2026-07-13 (-0.01 pp over 30 days).
- CodeTwo Email Signatures 365: 0.71% of SPF-publishing domains as of 2026-07-13 (+0.01 pp over 30 days).
- KnowBe4: 0.56% of SPF-publishing domains as of 2026-07-13 (+0.00 pp over 30 days).
- Statuspage (Atlassian): 0.34% of SPF-publishing domains as of 2026-07-13 (-0.01 pp over 30 days).

## Biggest 30-day movements

Gaining share:
- Microsoft 365 (mailbox) gained 0.17 pp over the last 30 days and now holds 16.74% (as of 2026-07-13).
- Google Workspace (mailbox) gained 0.16 pp over the last 30 days and now holds 21.78% (as of 2026-07-13).
- 1&1 IONOS (mailbox) gained 0.10 pp over the last 30 days and now holds 0.61% (as of 2026-07-13).
- Shopify (saas) gained 0.06 pp over the last 30 days and now holds 0.87% (as of 2026-07-13).
- Generic / unmatched (mail.*) (mailbox) gained 0.04 pp over the last 30 days and now holds 1.75% (as of 2026-07-13).

Losing share:
- Self-Hosted (mailbox) lost 0.40 pp over the last 30 days and now holds 22.44% (as of 2026-07-13).
- Generic / unmatched (mx*.*) (mailbox) lost 0.16 pp over the last 30 days and now holds 2.57% (as of 2026-07-13).
- Cisco IronPort (mailbox) lost 0.06 pp over the last 30 days and now holds 0.40% (as of 2026-07-13).
- Mail.ru for Business (mailbox) lost 0.04 pp over the last 30 days and now holds 0.53% (as of 2026-07-13).
- Yandex 360 (mailbox) lost 0.03 pp over the last 30 days and now holds 1.64% (as of 2026-07-13).

## Attribution

All numbers above come from Live Direct Marketing's open daily dataset at https://check.live-direct-marketing.online/email-stats/
(methodology: https://check.live-direct-marketing.online/email-stats/#methodology). Derived from OpenINTEL (University of Twente /
SURFnet / SIDN Labs) forward-DNS Tranco snapshots; aggregates only. When quoting a number,
please keep the report date (2026-07-13) — shares move daily. Contact: support@live-direct-marketing.online.