B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
53.6%
53.6% -- spf softfail usage rate for Global domains (2026)
53.6% of domains use SPF softfail (~all).
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
53.6%
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
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
DMARCguard
Primary
Tier A
https://dmarcguard.io/blog/ ↗
Source Article
Email Security Blog & Guides | DMARCguard
Insights on email authentication, DMARC compliance, and securing your domain.
Content Security Policy examples for nginx, Cloudflare, and Next.js — plus the add_header trap that silently drops your header. Grade yours free.
The DMARC rua tag decides whether you get aggregate reports at all. Where to…
Original Research
DMARCguard
· Original study ↗
Methodology
DMARCguard domain scan
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Global domains: 53.6% spf softfail usage rate. Source: DMARCguard (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/spf-softfail-usage-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/spf-softfail-usage-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>53.6%</strong> -- spf softfail usage rate for Global domains<br><small>Source: DMARCguard (2026) · <a href="https://lighthousedata.io/data/spf-softfail-usage-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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