{
  "id": "BRD-109",
  "slug": "brd-109",
  "title": "Brand contact email must not use a free consumer domain",
  "statement": "The brand support/business contact email must be on a domain the business controls, not a free consumer mail provider.",
  "rationale": "A business-domain email is weak evidence that the registrant controls the business they are registering. Free consumer addresses are the pattern fraudulent registrations use, so several providers reject them outright rather than weighting them.",
  "layer": "BRAND",
  "layerSlug": "brand",
  "object": "brand.email",
  "severity": "BLOCKING",
  "detectability": [
    "DETERMINISTIC"
  ],
  "failureClass": "RETRY_FIELD",
  "authorities": [
    "AWS",
    "TCR",
    "Sinch",
    "Bandwidth",
    "Telnyx"
  ],
  "applicability": {
    "excludeEntityTypes": [
      "SOLE_PROPRIETOR"
    ]
  },
  "applicabilityText": "Applies when the brand is NOT a sole proprietor.",
  "universal": false,
  "remediation": "Use an email address on your business domain (e.g. support@yourcompany.com). Free consumer addresses are rejected for registered entities.",
  "example": "support@acmecoffee.com",
  "notes": "Sole proprietors are carved out — they legitimately have no business domain. Severity varies by authority (MEDIUM at carriers, BLOCKING at AWS/TCR/Sinch); strictest kept.",
  "catalogIds": [
    "BRD-110"
  ],
  "phase": "approval",
  "automated": true,
  "url": "https://ekas.io/rules/10dlc/brand/brd-109/",
  "markdown": "https://ekas.io/rules/10dlc/brand/brd-109.md",
  "registry": "https://ekas.io/rules/10dlc/",
  "updated": "2026-07-25",
  "licence": "CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/"
}