{
 "metric": "mx-dane",
 "segment": "gb-small",
 "anchor": "company",
 "label": "UK small companies",
 "population": "UK small companies",
 "states": [
  "present",
  "absent"
 ],
 "quiet_failure_states": [
  "absent"
 ],
 "measurement": "Tier 0 (DNS-only, so it works even where port 25 is blocked). TLSA lookup at `_25._tcp.<mx>`. Denominator: `has_mx`.",
 "why_it_matters": "DANE is what turns opportunistic TLS into authenticated TLS — it tells a sender which certificate to expect, closing the downgrade gap that `mx-tls-cert` exposes.",
 "limits": "Near-universally absent outside a few countries; useful as an adoption frontier rather than an actionable defect for a small company.",
 "data_tier": "smtp",
 "population_predicate": "has_mx",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-14",
  "n": 551,
  "qf_pct": 98.19,
  "ci": [
   96.69,
   99.01
  ],
  "dist": {
   "present": 1.81,
   "absent": 98.19
  },
  "snapshot": "uk-companies-house-per600-seed20260728"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 460,
   "qf_pct": 99.35,
   "ci": [
    98.1,
    99.78
   ],
   "dist": {
    "present": 0.65,
    "absent": 99.35
   },
   "snapshot": "uk-companies-house-per300-seed20260728"
  },
  {
   "day": "2026-08-02",
   "n": 461,
   "qf_pct": 99.35,
   "ci": [
    98.1,
    99.78
   ],
   "dist": {
    "present": 0.65,
    "absent": 99.35
   },
   "snapshot": "uk-companies-house-per300-seed20260728"
  },
  {
   "day": "2026-08-04",
   "n": 554,
   "qf_pct": 98.19,
   "ci": [
    96.71,
    99.02
   ],
   "dist": {
    "present": 1.81,
    "absent": 98.19
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-05",
   "n": 554,
   "qf_pct": 98.19,
   "ci": [
    96.71,
    99.02
   ],
   "dist": {
    "present": 1.81,
    "absent": 98.19
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-07",
   "n": 552,
   "qf_pct": 98.19,
   "ci": [
    96.7,
    99.01
   ],
   "dist": {
    "present": 1.81,
    "absent": 98.19
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-14",
   "n": 551,
   "qf_pct": 98.19,
   "ci": [
    96.69,
    99.01
   ],
   "dist": {
    "present": 1.81,
    "absent": 98.19
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/mx-dane/gb-small"
}