B
Evidence Grade B
Graded
under review
Safe to Cite
Current
86%
86% -- share of permerror cases from lookup limit and duplicate records for SPF PermError cases (2026)
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
86%
Unit
Percentage
Data Vintage
2026
Entity
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
DMARCguard
Primary
Tier B
https://dmarcguard.io/blog/spf-permerror-fix/ ↗
Source Article
SPF PermError: How to Find and Fix It (2026 Guide) | DMARCguard
SPF PermError: What Causes It and How to Fix It Step-by-Step
In our SPF Supply Chain Study, we scanned 5,499,028 domains and found 148,655 with SPF configurations that exceed the 10-lookup limit — the most common trigger for SPF PermError. If your emails are silently failing authentication, an inval…
Original Research
DMARCguard
· Original study ↗
Methodology
Vendor-reported data
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
SPF PermError cases: 86% share of permerror cases from lookup limit and duplicate records. Source: DMARCguard (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/top-two-causes-permerror-share-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/top-two-causes-permerror-share-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>86%</strong> -- share of permerror cases from lookup limit and duplicate records for SPF PermError cases<br><small>Source: DMARCguard (2026) · <a href="https://lighthousedata.io/data/top-two-causes-permerror-share-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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