FuriaHubSelf-hosted email among top domains has halved since 2016
Artem Berezin’s OpenINTEL analysis finds self-hosted mail among the top million domains fell from 44.6% in 2016 to 22.4% in 2026. It is still the largest single category, but it is dropping about 0.5 percentage points every 30 days.
On August 26, 2026 The Register reported OpenINTEL research showing self-hosted email in steep decline as Microsoft and Google take a larger share.
What we know
- Artem Berezin’s OpenINTEL analysis finds self-hosted mail among the top million domains fell from 44.6% in 2016 to 22.4% in 2026.
- Google Workspace accounts for 21.8% of detectable MX records and Microsoft 365 for 16.8%.
- Self-hosted mail is still the largest single category, but it is falling by about 0.5 percentage points every 30 days.
- Google and Microsoft together handle 38.6% of inbound mail for popular domains.
- More than half of observed DMARC records have no valid policy or are monitor-only.
Takeaways
- Self-hosted mail’s share among popular domains has roughly halved in a decade.
- Google and Microsoft together now take 38.6% of inbound mail for those domains.
- Most observed DMARC records still do not enforce a valid policy.
Source: The Register
