B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
38.9%
38.9% -- dkim adoption rate for Top 10,000 domains (2026)
Among the top 10,000 domains, DKIM adoption rate is 38.9%.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
38.9%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
10,000
Geography
Global
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
DMARCguard
Primary
Tier A
https://dmarcguard.io/blog/dkim-alignment-failure-fix/ ↗
Source Article
DKIM Fail: How to Fix Alignment and Verification Errors | DMARCguard
Why DKIM Fails and How to Fix Every Type of Alignment Error
Of the 5,499,028 domains we scanned in our State of Email Authentication 2026 research, only 22.7% had a detectable DKIM record. That is the lowest adoption rate among all core email authentication protocols. Among the top 10,000 domains, a…
Original Research
DMARCguard
· Original study ↗
Methodology
DMARCguard State of Email Authentication 2026 domain scan, top 10,000 domains subset
Methodology documented
Segmentation
Industrymarketing
Company SizeEnterprise
RegionGlobal
RoleAll marketers
Channelemail
Cite this stat
Plain Text
Top 10,000 domains: 38.9% dkim adoption rate. Source: DMARCguard (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/dkim-adoption-top-10k-domains-2026
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<blockquote cite="https://lighthousedata.io/data/dkim-adoption-top-10k-domains-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>38.9%</strong> -- dkim adoption rate for Top 10,000 domains<br><small>Source: DMARCguard (2026) · <a href="https://lighthousedata.io/data/dkim-adoption-top-10k-domains-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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