MTA-STS · Norway large companies

What share of Norway large companies have no enforcing MTA-STS policy (absent or testing mode)?

96.72%

96.72% of Norway large companies (95% CI 93.03–98.49%), measured across 183 companies on 2026-08-10.

enforce: 3.28%testing: 1.09%no record: 95.63%
enforce · 3.28%testing · 1.09%no record · 95.63%
Trend

Measured every Monday since 2026-08-01 — 2 observations to date. Last measured 2026-08-10.

How this is measured

Tier 0 + 3a. TXT at _mta-sts.<domain>; if present, fetch https://mta- sts.<domain>/.well-known/mta-sts.txt and read mode. 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: national company registries (Companies House, Brreg, SIRENE), sampled by size band and resolved to email-active domains. Parked domains excluded. Snapshot: brreg-norway-per600-seed20260730.

Licensed CC BY 4.0 — reuse with attribution to Quiet Failures. Download: JSON · CSV.

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Why it matters

The declared-vs-enforcing split is exactly the brand thesis. mode: testing publishes a policy, produces reports, and does not require TLS — downgrade attacks still work. The DNS record alone looks like adoption; only the fetched policy reveals whether it bites.

The same check, other segments

Show the remaining 65 segments

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