Email Infrastructure Index
A live look at how the world configures email — MX providers, SPF & DMARC adoption.
Sample of 50,000 domains · updated Wed, 01 Jul 2026 12:31:00 GMT.
79.9%
have MX (mail-enabled)
22.6%
enforce DMARC p=reject
MX provider market share
| Other / self-hosted
| 32.6% |
| Google Workspace / Gmail
| 28.2% |
| Microsoft 365 / Outlook
| 22.5% |
| Proofpoint
| 5.5% |
| Mimecast
| 3.1% |
| Tencent QQ
| 2% |
| Namecheap
| 1.3% |
| Cisco IronPort
| 0.9% |
| Zoho
| 0.8% |
| Barracuda
| 0.6% |
| Amazon SES
| 0.5% |
| Fastmail
| 0.4% |
DMARC policy (of domains with DMARC)
| none | 37.2% (11909) |
| reject | 35.2% (11276) |
| quarantine | 27.6% (8817) |
SPF enforcement (of domains with SPF)
| ~ | 50.4% (19087) |
| - | 44.6% (16891) |
| none | 2.6% (990) |
| ? | 2.4% (920) |
| + | 0% (7) |
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.