TLD

.io

7,654 domains tracked. 28.4% at DMARC enforcement (p=reject or p=quarantine), backed by 2,172 enforced domains.

Domains tracked
7K+
7,654
DMARC enforcement
28.4%
p=reject + p=quarantine
Avg posture score
34.5
of 100
A-grade domains
45
1 A+ · 44 A

Authentication posture

per protocol

DMARC

policy enforcement: 28.4%
reject
15.3%
quarantine
13.1%
none
21.7%
missing
49.9%

SPF

pass rate: 61.0%
0
pass
61.0%
warn
1.8%
fail
37.2%
not found
0.0%

DKIM

pass rate: 42.9%
00
pass
42.9%
warn
0.0%
fail
57.1%
not found
0.0%

MTA-STS

pass rate: 1.0%
0
pass
1.0%
warn
0.6%
fail
98.4%
not found
0.0%

TLS-RPT

pass rate: 1.6%
00
pass
1.6%
warn
0.0%
fail
98.4%
not found
0.0%

BIMI

pass rate: 0.9%
0
pass
0.9%
warn
0.4%
fail
98.8%
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