Country
Czechia
3,129 domains tracked. 25.2% at DMARC enforcement (p=reject or p=quarantine), backed by 788 enforced domains.
Domains tracked
3K+
3,129
DMARC enforcement
25.2%
p=reject + p=quarantine
Avg posture score
40.6
of 100
A-grade domains
5
0 A+ · 5 A
Authentication posture
per protocolDMARC
policy enforcement: 25.2%reject
9.9%quarantine
15.3%none
34.7%missing
40.1%SPF
pass rate: 78.5%0
pass
78.5%warn
0.5%fail
21.0%not found
0.0%DKIM
pass rate: 49.3%00
pass
49.3%warn
0.0%fail
50.7%not found
0.0%MTA-STS
pass rate: 0.7%0
pass
0.7%warn
0.4%fail
98.9%not found
0.0%TLS-RPT
pass rate: 1.1%0
pass
1.1%warn
0.1%fail
98.8%not found
0.0%BIMI
pass rate: 0.5%0
pass
0.5%warn
0.2%fail
99.3%not found
0.0%Top performers
20 of 3,129 tracked| # | Domain | Score | Grade |
|---|---|---|---|
| 1 | hptronic.cz | 88 | A |
| 2 | active24.cz | 87 | A |
| 3 | celnisprava.cz | 87 | A |
| 4 | hrad.cz | 85 | A |
| 5 | ustrcr.cz | 85 | A |
| 6 | marionnaud.cz | 84 | B |
| 7 | nemcb.cz | 82 | B |
| 8 | blep.cz | 81 | B |
| 9 | vscht.cz | 81 | B |
| 10 | csas.cz | 80 | B |
| 11 | hypnozio.com | 80 | B |
| 12 | poda.cz | 80 | C |
| 13 | rb.cz | 80 | B |
| 14 | faster.cz | 79 | C |
| 15 | volvoklub.cz | 79 | B |
| 16 | amigonet.cz | 78 | B |
| 17 | cra.cz | 78 | B |
| 18 | homolka.cz | 78 | B |
| 19 | moebelix.cz | 78 | B |
| 20 | suas.cz | 78 | B |
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