Sector
Healthcare
4,473 domains tracked. 34.9% at DMARC enforcement (p=reject or p=quarantine), backed by 1,562 enforced domains.
Domains tracked
4K+
4,473
DMARC enforcement
34.9%
p=reject + p=quarantine
Avg posture score
41.7
of 100
A-grade domains
40
2 A+ · 38 A
Authentication posture
per protocolDMARC
policy enforcement: 34.9%reject
16.0%quarantine
18.9%none
29.7%missing
35.3%SPF
pass rate: 71.4%0
pass
71.4%warn
1.7%fail
26.9%not found
0.0%DKIM
pass rate: 49.3%pass
49.3%warn
0.1%fail
50.5%not found
0.1%MTA-STS
pass rate: 0.8%pass
0.8%warn
0.6%fail
98.1%not found
0.5%TLS-RPT
pass rate: 2.1%pass
2.1%warn
30.4%fail
66.9%not found
0.5%BIMI
pass rate: 1.4%pass
1.4%warn
0.3%fail
97.8%not found
0.5%Top performers
20 of 4,473 tracked| # | Domain | Score | Grade |
|---|---|---|---|
| 1 | drinkag1.com | 95 | A+ |
| 2 | hollandandbarrett.com | 95 | A+ |
| 3 | healthspan.co.uk | 93 | A |
| 4 | wales.nhs.uk | 92 | A |
| 5 | amgen.com | 90 | A |
| 6 | biomerieux.com | 90 | A |
| 7 | clinical-partners.co.uk | 90 | A |
| 8 | hollandandbarrett.ie | 90 | A |
| 9 | merseycare.nhs.uk | 90 | A |
| 10 | mft.nhs.uk | 90 | A |
| 11 | uhb.nhs.uk | 90 | A |
| 12 | good-sam.com | 89 | A |
| 13 | ada.com | 88 | A |
| 14 | amboss.com | 88 | A |
| 15 | crunch.com | 88 | A |
| 16 | ecotree.green | 88 | A |
| 17 | esneft.nhs.uk | 88 | A |
| 18 | ewg.org | 88 | A |
| 19 | giveusashout.org | 88 | A |
| 20 | hcpro.com | 88 | A |
How this is measured
Each tracked domain is scanned for SPF, DKIM, DMARC, MTA-STS, TLS-RPT, and BIMI. Result statuses (pass / fail / warn / not-found) and DMARC policy values are aggregated into this page nightly. The top performers list is capped at 20. The full corpus is much larger and is not enumerated publicly.
Data provenance
- Scanner — Authex Labs public scanner (DNS, RFC-compliant)
- Refreshed — daily at 04:05 UTC
- Last seen — 8 May 2026