Email Deliverability Guides and Research
Data-backed guides built from Live Direct Marketing's daily census of email infrastructure across the world's top 1 million websites (Tranco top-1M, latest snapshot September 24, 2026). Every number links back to the underlying daily dataset.
Key facts
- 644 guides in total: 8 overviews + one per provider/ESP/SaaS sender.
- All figures recomputed daily from OpenINTEL forward-DNS Tranco snapshots.
- Latest snapshot: 2026-09-24.
Overviews
Signals — what moved in 30 days
The fastest-growing and declining providers, plus DMARC movement.
Top mailbox providers
All 232 mailbox providers in the top 1M, ranked.
Top ESPs & mass-mailing services
All 264 email service providers, ranked by SPF share.
SaaS senders
All 140 SaaS platforms that send on behalf of domains.
DMARC adoption & enforcement
How many top domains publish DMARC — and how few enforce it.
The long tail of email
The internet beyond Google and Microsoft.
Unmatched MX targets (top 100)
The most common MX hosts not yet classified.
Unmatched SPF includes (top 100)
The most common SPF includes not yet classified.
Per-provider guides
Deep-dive guides for every identified provider: mailbox providers (232), ESPs (264), SaaS senders (140).
For journalists & researchers
Free-to-cite statistics, story angles and data downloads: press kit & media resources →
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