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Daily DNS check, 2026-08-02: 70.12% of domains publish DMARC, 47.42% mean it

#email #dns #security #data

The 2026-08-02 snapshot is published. Below: what moved since the previous scan, and what the long tail still looks like.

The numbers, 2026-08-02

Metric Value
Domains with MX 664,010
Publish SPF 94.59%
Publish DMARC 70.12%
DMARC enforced (quarantine/reject) 47.42%
DMARC on p=none 236,668
No rua= reporting address 163,514 (35.12%)
Self-hosted MX 22.76%
MX we could not attribute 11.24%

47.42% of DMARC records are actually enforced (p=quarantine or p=reject). 163,514 domains (35.12% of those with DMARC) publish no rua= address, so nobody reads the reports.

Movement 

DMARC enforced %, last 30 snapshots
▄▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▂▂▂▃▃▅▅▆▆▇███
day    +0.02 pp
week   +0.31 pp
month  +0.29 pp
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Day over day the enforcement rate moved +0.02 pp. The scanned population changed by −3020 domains, which is list churn, not adoption.

Who runs the mailboxes 

Self-Hosted                 │██████████████████████│ 22.76%
Google Workspace            │█████████████████████ │ 21.80%
Microsoft 365               │████████████████      │ 16.94%
Unknown / Other             │███████               │ 6.76%
Generic / unmatched (mx*.*) │██                    │ 2.56%
Proofpoint                  │██                    │ 1.94%
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Top ESPs by sending infrastructure found in SPF: Amazon SES (6.20%), SendGrid (Twilio) (4.75%), Mailgun (4.10%), Zendesk (3.83%), Mailchimp (3.70%).

Top 1,000 domains vs everyone else

Among the top 1k domains, 93.66% publish SPF and 73.05% enforce DMARC. Across the full population: 94.59% and 47.42%. SPF adoption is effectively the same in both groups, while enforcement differs by +25.6 pp — publishing a record is the easy half, and it is the second number that separates the head of the list from the tail.

Check your own domain 

dig +short TXT example.com | grep spf1
dig +short TXT _dmarc.example.com
dig +short MX example.com
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If the DMARC record comes back with p=none and no rua=, you are in the 35.12% group above: publishing a policy that enforces nothing and reports to no one.

Method

Daily scan of the tranco list, 664,010 domains with MX on 2026-08-02; methodology version 2026.07.26. Percentages are shares of domains with MX unless stated otherwise. The full dataset, per-provider breakdowns and 212 historical snapshots back to 2016-01-22 are published here:

https://check.live-direct-marketing.online/email-stats/

New snapshot every day; this post is generated straight from that dataset.

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