TLD

.cz

2,699 domains tracked. 26.2% at DMARC enforcement (p=reject or p=quarantine), backed by 708 enforced domains.

Domains tracked
2K+
2,699
DMARC enforcement
26.2%
p=reject + p=quarantine
Avg posture score
42.0
of 100
A-grade domains
5
0 A+ · 5 A

Authentication posture

per protocol

DMARC

policy enforcement: 26.3%
reject
9.8%
quarantine
16.5%
none
36.4%
missing
37.3%

SPF

pass rate: 80.6%
0
pass
80.6%
warn
0.4%
fail
18.9%
not found
0.0%

DKIM

pass rate: 51.0%
00
pass
51.0%
warn
0.0%
fail
49.0%
not found
0.0%

MTA-STS

pass rate: 0.8%
0
pass
0.8%
warn
0.4%
fail
98.8%
not found
0.0%

TLS-RPT

pass rate: 1.3%
00
pass
1.3%
warn
0.0%
fail
98.7%
not found
0.0%

BIMI

pass rate: 0.5%
0
pass
0.5%
warn
0.2%
fail
99.3%
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