SPF policy · Czechia (domains)
What share of domains in Czechia have no enforcing SPF record (absent, ~all soft-fail, or +all)?
73.41% of domains in Czechia (95% CI 67.8–78.35%), measured across 267 domains on 2026-10-01.
Measured every Monday since 2026-08-01 — 12 observations to date. Last measured 2026-10-01.
How this is measured
Tier 0. TXT at the apex; find v=spf1, read the all qualifier, count direct lookups. Denominator: has_mx.
Passive measurement: a single DNS lookup, TLS handshake, or homepage GET per domain. Aggregate-only; no individual company is named. 95% Wilson confidence intervals. Population: domains sampled from the Common Crawl web graph, filtered to those that do email. Parked domains excluded. Snapshot: common-crawl-domain-stratified-c400-g2500-seed20260729.
Licensed CC BY 4.0 — reuse with attribution to Quiet Failures. Download: JSON · CSV.
Check a specific domain against this control with the free Email authentication audit.
Why it matters
~all is the SPF equivalent of p=none and overwhelmingly the most common configuration — it asks receivers to accept-but-mark, so spoofed mail still arrives. +all authorises the entire internet to send as you. Exceeding the 10-lookup limit makes the record fail permanently and silently, because receivers abort evaluation.
Limits of this measurement
The lookup count is non-recursive (it does not expand include:), so it is a lower bound and catches only egregiously over-limit records.
The same check, other segments
- Russia (domains)95.16%
- South Korea (domains)95.11%
- Ukraine (domains)94.52%
- Japan (domains)88.54%
- Indonesia (domains)88.44%
- Bulgaria (domains)88.37%
- Chile (domains)87.04%
- Lithuania (domains)85.76%
Show the remaining 65 segments
- Taiwan (domains)84.57%
- India (domains)82.58%
- Israel (domains)81.78%
- Hungary (domains)81.73%
- Croatia (domains)81.38%
- Peru (domains)79.91%
- Slovenia (domains)79.64%
- Romania (domains)79.32%
- Italy (domains)78.99%
- South Africa (domains)77.35%
- Spain (domains)75.97%
- Hong Kong (domains)75.83%
- Mexico (domains)75.72%
- Vietnam (domains)75.46%
- Canada (domains)75.24%
- Germany (domains)74.76%
- France (domains)74.63%
- the Philippines (domains)74.23%
- Finland (domains)73.96%
- Thailand (domains)73.08%
- Latvia (domains)72.61%
- Brazil (domains)72.25%
- global domains72.15%
- the EU (domains)71.43%
- France micro companies70.74%
- New Zealand (domains)69.92%
- the US (domains)69.83%
- Singapore (domains)69.75%
- UK newly-formed (no accounts filed) companies69.42%
- Malaysia (domains)69.41%
- Estonia (domains)68.57%
- Saudi Arabia (domains)68.28%
- UK micro companies67.39%
- the UK (domains)67.18%
- Ireland (domains)67.05%
- the UAE (domains)66.54%
- Norway (domains)66.54%
- Portugal (domains)65.58%
- Slovakia (domains)65.31%
- Belgium (domains)64.97%
- Sweden (domains)64.76%
- Denmark (domains)63.18%
- France small companies62.45%
- UK dormant companies62.37%
- Turkey (domains)61.78%
- France companies60.44%
- the Netherlands (domains)60.22%
- Australia (domains)58.89%
- Argentina (domains)58.57%
- Iceland (domains)57.33%
- UK companies56.07%
- Greece (domains)55.64%
- UK small companies55.57%
- Switzerland (domains)55.1%
- Luxembourg (domains)54.21%
- France large companies53.89%
- Norway micro companies53.24%
- France medium companies52%
- Austria (domains)51.17%
- UK medium & large companies50.33%
- Norway small companies47.04%
- Norway large companies46.63%
- Norway companies45.05%
- Poland (domains)41.07%
- Norway medium companies33.46%