逆引きMX検索（廃止予定）

リクエスト例

# Deprecated limited cache lookup for prior DomScan DNS observations
curl -H "X-API-Key: your-api-key" "https://domscan.net/v1/reverse/mx?mx=aspmx.l.google.com&limit=100"

# Deprecated limited cache lookup for another MX hostname
curl -H "X-API-Key: your-api-key" "https://domscan.net/v1/reverse/mx?mx=outlook.protection.outlook.com"

レスポンス例

{
  "query": {
    "mx": "aspmx.l.google.com",
    "match": "exact",
    "include_apex_only": true
  },
  "deprecated": true,
  "deprecation_notice": "This endpoint is deprecated. It only searches a best-effort seven-day passive index populated by prior /v1/dns/all lookups and capped at 10,000 recent entries per key. It is not an internet-wide reverse DNS dataset.",
  "results": [],
  "summary": {
    "total_found": 0,
    "returned": 0
  },
  "freshness_summary": {
    "source": "passive_dns",
    "cache_status": "passive_cache_only",
    "result_count": 0,
    "returned_count": 0,
    "apex_domain_count": 0,
    "apex_deduped_count": 0,
    "warnings": ["passive_cache_only", "no_cached_matches"]
  },
  "page": {
    "limit": 100,
    "next_cursor": null
  },
  "meta": {
    "source": "passive_dns",
    "note": "Best-effort seven-day index populated only by prior /v1/dns/all lookups"
  }
}