Email Infrastructure Index
A live look at how the world configures email, MX providers, SPF & DMARC adoption.
Sample of 50,000 domains · updated Sat, 15 Aug 2026 04:19:02 GMT.
80.3%
have MX (mail-enabled)
23%
enforce DMARC p=reject
Authentication funnel (of mail-enabled domains)
| Mail-enabled (have MX)
| 100% |
| Publish SPF
| 91.7% |
| Publish DMARC
| 77.5% |
| Enforce (quarantine or reject)
| 48.7% |
| Reject (p=reject)
| 26.5% |
MX provider market share
| Other / self-hosted
| 32.2% |
| Google Workspace / Gmail
| 28.3% |
| Microsoft 365 / Outlook
| 22.8% |
| Proofpoint
| 5.6% |
| Mimecast
| 3.1% |
| Tencent QQ
| 2% |
| Namecheap
| 1.2% |
| Cisco IronPort
| 0.9% |
| Zoho
| 0.8% |
| Barracuda
| 0.6% |
| Amazon SES
| 0.5% |
| Fastmail
| 0.4% |
DMARC enforcement by provider
| provider | p=reject · SPF -all |
| Other / self-hosted | 18.6% · 43% |
| Google Workspace / Gmail | 27% · 25.9% |
| Microsoft 365 / Outlook | 31.6% · 60.8% |
| Proofpoint | 61.8% · 44.4% |
| Mimecast | 36.1% · 41.6% |
| Tencent QQ | 2.4% · 6.7% |
| Namecheap | 1% · 1.4% |
DMARC policy (of domains with DMARC)
| none | 36.6% (11834) |
| reject | 35.5% (11498) |
| quarantine | 27.9% (9017) |
SPF enforcement (of domains with SPF)
| ~ | 50.2% (19178) |
| - | 44.9% (17163) |
| none | 2.5% (953) |
| ? | 2.4% (909) |
| + | 0% (7) |
Weekly deep-dives on this data → Insights (RSS). Methodology: Live DNS scan (MX/SPF/DMARC). Aggregate only, no email sent, no personal data. · Free to reuse with attribution (CC BY 4.0). Data: JSON API.
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