B Evidence Grade B Graded accuracy verified by the review judge Safe to Cite Current

19.6%

19.6% -- spf record market share for Microsoft 365 (2026-03)

Name: Spf Record Market Share Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-19

2026-03 · n=3,077,219 · DMARCguard

Microsoft 365 accounts for a 19.6% share among all SPF-enabled domains scanned.

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Attribution: DMARCguard View source

Lighthouse Research Team

Last verified: 2026-09-19 · How we verify data →

Source verified Evidence graded

Value

19.6%

Unit

Percentage

Data Vintage

2026-03

Entity

Microsoft 365

Sample Size

3,077,219

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

61/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

DMARCguard Primary Tier A

https://dmarcguard.io/research/spf-supply-chain/ ↗

Confidence: 57/100 Vintage: 2026-03 Channel: Deep Crawl

Source Article

SPF Supply Chain 2026: Email Sender Market Share Across 5.5 Million Domains | DMARCguard

SPF Supply Chain 2026: Email Sender Market Share Across 5.5 Million Domains Microsoft 365 powers 19.6% of SPF-enabled domains. First-ever email sender market share by SPF include, analyzing 3 million domains from Tranco Top Sites. Study at a glance Executive Summary Microsoft 365 and Google Workspac…

Original Research

DMARCguard · Original study ↗

Methodology

Proprietary SPF parser scanning 5,499,028 domains from Tranco Top Sites List; 3,077,219 SPF-enabled domains

Methodology documented

Segmentation

Industrymarketing

Cite this stat

Plain Text

Microsoft 365: 19.6% spf record market share. Source: DMARCguard (2026-03). Via Lighthouse Intelligence -- https://lighthousedata.io/data/microsoft365-spf-market-share-2026

HTML Embed

<blockquote cite="https://lighthousedata.io/data/microsoft365-spf-market-share-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>19.6%</strong> -- spf record market share for Microsoft 365<br><small>Source: DMARCguard (2026-03) · <a href="https://lighthousedata.io/data/microsoft365-spf-market-share-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

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