TLD

.uk

1,592 domains tracked. 6.3% at DMARC enforcement (p=reject or p=quarantine), backed by 100 enforced domains.

Domains tracked
1K+
1,592
DMARC enforcement
6.3%
p=reject + p=quarantine
Avg posture score
9.2
of 100
A-grade domains
6
1 A+ · 5 A

Authentication posture

per protocol

DMARC

policy enforcement: 6.3%
reject
3.4%
quarantine
2.9%
none
7.0%
missing
86.7%

SPF

pass rate: 18.6%
0
pass
18.6%
warn
0.3%
fail
81.1%
not found
0.0%

DKIM

pass rate: 9.4%
00
pass
9.4%
warn
0.0%
fail
90.6%
not found
0.0%

MTA-STS

pass rate: 0.8%
0
pass
0.8%
warn
0.1%
fail
99.1%
not found
0.0%

TLS-RPT

pass rate: 1.0%
0
pass
1.0%
warn
0.1%
fail
98.9%
not found
0.0%

BIMI

pass rate: 0.1%
0
pass
0.1%
warn
0.1%
fail
99.8%
not found
0.0%

No top performers available yet. The leaderboard refreshes nightly.

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