{"id":8868,"date":"2025-03-05T10:49:30","date_gmt":"2025-03-05T09:49:30","guid":{"rendered":"https:\/\/webhosting.de\/dmarc-implementierung-email-sicherheit\/"},"modified":"2025-03-05T10:49:30","modified_gmt":"2025-03-05T09:49:30","slug":"dmarc%e3%81%ae%e5%ae%9f%e8%a3%85%e9%9b%bb%e5%ad%90%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/dmarc-implementierung-email-sicherheit\/","title":{"rendered":"DMARC\u306e\u5c0e\u5165\u306b\u3088\u308b\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5411\u4e0a"},"content":{"rendered":"

\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068DMARC\u306e\u7d39\u4ecb<\/h2><\/p>\n

\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u3088\u308b\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u4eca\u65e5\u306e\u30c7\u30b8\u30bf\u30eb\u793e\u4f1a\u3067\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u6700\u3082\u91cd\u8981\u3067\u3059\u3002\u4f01\u696d\u3084\u7d44\u7e54\u306f\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u3001\u306a\u308a\u3059\u307e\u3057\u3001\u305d\u306e\u4ed6\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u8a50\u6b3a\u306a\u3069\u306e\u8105\u5a01\u306b\u307e\u3059\u307e\u3059\u76f4\u9762\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u8ab2\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u3001DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09\u306f\u3001\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u52b9\u679c\u7684\u306a\u30c4\u30fc\u30eb\u3068\u3057\u3066\u767b\u5834\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001DMARC\u306e\u5b9f\u88c5\u3068\u3001DMARC\u304c\u3069\u306e\u3088\u3046\u306b\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u304b\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

DMARC\u3068\u306f\uff1f<\/h2><\/p>\n

DMARC\u3068\u306f\u3001Domain-based Message Authentication, Reporting, and Conformance\u306e\u7565\u3002\u3053\u308c\u306f\u3001\u65e2\u5b58\u306eSPF\uff08Sender Policy Framework\uff09\u304a\u3088\u3073DKIM\uff08DomainKeys Identified Mail\uff09\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u57fa\u306b\u69cb\u7bc9\u3055\u308c\u305f\u96fb\u5b50\u30e1\u30fc\u30eb\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308b\u3002DMARC\u306f\u3001\u7279\u306b\u306a\u308a\u3059\u307e\u3057\u3084ID\u4e0d\u6b63\u4f7f\u7528\u306b\u3088\u308b\u653b\u6483\u304b\u3089\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30c9\u30e1\u30a4\u30f3\u3092\u4e0d\u6b63\u4f7f\u7528\u304b\u3089\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u305f\u3002<\/p>\n

DMARC\u306e\u4e3b\u306a\u76ee\u7684\u306f\u3001\u8a8d\u8a3c\u3055\u308c\u305f\u9001\u4fe1\u8005\u306e\u307f\u304c\u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3042\u308b\u3002\u3053\u308c\u306f\u3001DMARC\u304c\u8a8d\u8a3c\u30c1\u30a7\u30c3\u30af\u3092\u901a\u904e\u3057\u306a\u304b\u3063\u305f\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u3069\u306e\u3088\u3046\u306b\u51e6\u7406\u3059\u308b\u304b\u306b\u3064\u3044\u3066\u3001\u53d7\u4fe1\u5074\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306b\u660e\u78ba\u306a\u6307\u793a\u3092\u4e0e\u3048\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u9054\u6210\u3055\u308c\u308b\u3002<\/p>\n

DMARC\u306f\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u306e\u304b\uff1f<\/h2><\/p>\n

DMARC\u306fSPF\u304a\u3088\u3073DKIM\u3068\u5bc6\u63a5\u306b\u9023\u643a\u3057\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u771f\u6b63\u6027\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u8a73\u7d30\u306a\u6982\u8981\u3067\u3059\uff1a<\/p>\n

    \n
  1. SPF (Sender Policy Framework)\uff1a<\/strong> SPF\u306f\u3001\u9001\u4fe1\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u3001\u6307\u5b9a\u3055\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u3092\u8a8d\u53ef\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001DNS\u306eSPF\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u4ecb\u3057\u3066\u884c\u308f\u308c\u3001\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u306f\u8a8d\u53ef\u3055\u308c\u305f\u30b5\u30fc\u30d0\u30fc\u3092\u30ea\u30b9\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002<\/li>\n
  2. DKIM\uff08DomainKeys Identified Mail\uff09\uff1a<\/strong> DKIM\u306f\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u30c7\u30b8\u30bf\u30eb\u7f72\u540d\u3092\u8ffd\u52a0\u3057\u3001\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u304c\u3053\u308c\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u7f72\u540d\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u3060\u3051\u304c\u77e5\u3063\u3066\u3044\u308b\u79d8\u5bc6\u9375\u306b\u57fa\u3065\u3044\u3066\u3044\u308b\u3002<\/li>\n
  3. DMARC\u30dd\u30ea\u30b7\u30fc\uff1a<\/strong> DMARC\u306f\u3001SPF\u3068DKIM\u306e\u30c1\u30a7\u30c3\u30af\u3092\u901a\u904e\u3057\u306a\u3044\u30e1\u30fc\u30eb\u3078\u306e\u5bfe\u51e6\u65b9\u6cd5\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u3002\u307e\u305f\u3001\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u304c\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u6d3b\u52d5\u3092\u76e3\u8996\u3059\u308b\u305f\u3081\u306e\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u3082\u63d0\u4f9b\u3057\u3066\u3044\u308b\u3002<\/li>\n<\/ol>\n

    \u3053\u308c\u30893\u3064\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001DMARC\u306f\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u8a8d\u8a3c\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u305f\u3081\u306e\u5305\u62ec\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n

    DMARC\u5c0e\u5165\u306e\u30e1\u30ea\u30c3\u30c8<\/h2><\/p>\n

    DMARC\u306e\u5c0e\u5165\u306f\u3001\u4f01\u696d\u3084\u7d44\u7e54\u306b\u591a\u304f\u306e\u5229\u70b9\u3092\u3082\u305f\u3089\u3059\uff1a<\/p>\n

    \u96fb\u5b50\u30e1\u30fc\u30eb\u8a50\u6b3a\u304b\u3089\u306e\u4fdd\u8b77<\/h3><\/p>\n

    DMARC\u306f\u3001\u8a50\u6b3a\u5e2b\u304c\u8cb4\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u6765\u305f\u3088\u3046\u306b\u898b\u305b\u304b\u3051\u305f\u507d\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u624b\u53e3\u3067\u3042\u308b\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u306b\u52b9\u679c\u7684\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u653b\u6483\u306e\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u3001\u8cb4\u793e\u306e\u7d44\u7e54\u3068\u9867\u5ba2\u306e\u4e21\u65b9\u3092\u8a50\u6b3a\u306e\u53ef\u80fd\u6027\u304b\u3089\u5b88\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u914d\u4fe1\u6027\u306e\u5411\u4e0a<\/h3><\/p>\n

    DMARC\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u6b63\u898f\u306eE\u30e1\u30fc\u30eb\u304c\u30b9\u30d1\u30e0\u30d5\u30a9\u30eb\u30c0\u3067\u306f\u306a\u304f\u3001\u53d7\u4fe1\u8005\u306e\u53d7\u4fe1\u30c8\u30ec\u30a4\u306b\u5c4a\u304f\u53ef\u80fd\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u9867\u5ba2\u3001\u30d1\u30fc\u30c8\u30ca\u30fc\u3001\u305d\u306e\u4ed6\u306e\u5229\u5bb3\u95a2\u4fc2\u8005\u3068\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u5927\u5e45\u306b\u6539\u5584\u3055\u308c\u307e\u3059\u3002<\/p>\n

    \u30d6\u30e9\u30f3\u30c9\u8a55\u4fa1\u306e\u4fdd\u8b77<\/h3><\/p>\n

    DMARC\u306f\u3001\u7121\u8a31\u53ef\u306e\u7b2c\u4e09\u8005\u304c\u8cb4\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u60aa\u7528\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3092\u9632\u3050\u3053\u3068\u3067\u3001\u8cb4\u793e\u306e\u30d6\u30e9\u30f3\u30c9\u306e\u8a55\u5224\u3092\u4fdd\u8b77\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u6d88\u8cbb\u8005\u304c\u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u307e\u3059\u307e\u3059\u95a2\u5fc3\u3092\u5bc4\u305b\u3066\u3044\u308b\u73fe\u5728\u3001\u7279\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n

    \u900f\u660e\u6027\u3068\u6d1e\u5bdf<\/h3><\/p>\n

    DMARC\u306f\u3001\u304a\u5ba2\u69d8\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u95a2\u9023\u3059\u308b\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306a\u30ec\u30dd\u30fc\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30ec\u30dd\u30fc\u30c8\u306f\u3001\u8ab0\u304c\u3042\u306a\u305f\u306e\u4ee3\u308f\u308a\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3044\u308b\u304b\u306b\u3064\u3044\u3066\u306e\u8cb4\u91cd\u306a\u6d1e\u5bdf\u3092\u4e0e\u3048\u3001\u4e0d\u6b63\u306a\u6d3b\u52d5\u3092\u7279\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

    \u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u9075\u5b88<\/h3><\/p>\n

    \u591a\u304f\u306e\u696d\u754c\u3084\u653f\u5e9c\u6a5f\u95a2\u3067\u306f\u3001\u5b89\u5168\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u901a\u4fe1\u306e\u6a19\u6e96\u3068\u3057\u3066DMARC\u306e\u63a1\u7528\u304c\u9032\u3093\u3067\u3044\u307e\u3059\u3002DMARC\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u9023\u3059\u308b\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3001\u30c7\u30fc\u30bf\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3078\u306e\u30b3\u30df\u30c3\u30c8\u30e1\u30f3\u30c8\u3092\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    DMARC\u5c0e\u5165\u306e\u30b9\u30c6\u30c3\u30d7<\/h2><\/p>\n

    DMARC\u306e\u5c0e\u5165\u306b\u306f\u3001\u614e\u91cd\u306a\u8a08\u753b\u3068\u6bb5\u968e\u7684\u306a\u5b9f\u73fe\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u4ee5\u4e0b\u306b\u6700\u3082\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u3092\u793a\u3059\uff1a<\/p>\n

    1. \u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30a4\u30f3\u30d5\u30e9\u306e\u30a4\u30f3\u30d9\u30f3\u30c8\u30ea\u30fc<\/h3><\/p>\n

    DMARC\u306e\u5b9f\u88c5\u3092\u59cb\u3081\u308b\u524d\u306b\u3001\u73fe\u5728\u306e\u30e1\u30fc\u30eb\u30a4\u30f3\u30d5\u30e9\u3092\u5206\u6790\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u4f7f\u7528\u3055\u308c\u308b\u3059\u3079\u3066\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3001\u304a\u3088\u3073\u30e1\u30fc\u30eb\u9001\u4fe1\u3092\u4ee3\u884c\u3059\u308b\u3059\u3079\u3066\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u3068\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002\u5b8c\u5168\u306a\u30a4\u30f3\u30d9\u30f3\u30c8\u30ea\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u6f5c\u5728\u7684\u306a\u8106\u5f31\u6027\u3092\u7279\u5b9a\u3057\u3001\u3059\u3079\u3066\u306e\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u30bd\u30fc\u30b9\u3092\u30ab\u30d0\u30fc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    2. SPF\u3068DKIM\u306e\u5b9f\u88c5<\/h3><\/p>\n

    DMARC\u306fSPF\u3068DKIM\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u304c\u3059\u3079\u3066\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002SPF\u306f\u3001\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u304a\u5ba2\u69d8\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u3092\u8a31\u53ef\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u5b9a\u7fa9\u3057\u3001DKIM\u306f\u5404\u30e1\u30fc\u30eb\u306b\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u4e0e\u3057\u307e\u3059\u3002DMARC\u306e\u6210\u529f\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u6b63\u3057\u304f\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n

    3. DMARC\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u4f5c\u6210<\/h3><\/p>\n

    \u30c9\u30e1\u30a4\u30f3\u306eDMARC\u30dd\u30ea\u30b7\u30fc\u3092\u4f5c\u6210\u3059\u308b\u3002\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5f37\u5236\u305b\u305a\u3001\u30ec\u30dd\u30fc\u30c8\u306e\u307f\u3092\u53ce\u96c6\u3059\u308b\u300c\u306a\u3057\u300d\u30dd\u30ea\u30b7\u30fc\u304b\u3089\u958b\u59cb\u3057\u307e\u3059\u3002DMARC\u30ec\u30b3\u30fc\u30c9\u306f\u3001DNS\u8a2d\u5b9a\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002<\/p>\n

    \u5358\u7d14\u306aDMARC\u30a8\u30f3\u30c8\u30ea\u30fc\u306e\u4f8b\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308b\uff1a<\/p>\n

    v=DMARC1; p=none; rua=mailto:dmarc-reports@ihredomain.com`<\/p>\n

    4. DMARC\u30ec\u30dd\u30fc\u30c8\u306e\u76e3\u8996\u3068\u5206\u6790<\/h3><\/p>\n

    DMARC\u30a8\u30f3\u30c8\u30ea\u304c\u30a2\u30af\u30c6\u30a3\u30d6\u306b\u306a\u3063\u305f\u3089\u3059\u3050\u306b\u3001\u751f\u6210\u3055\u308c\u308b\u30ec\u30dd\u30fc\u30c8\u306e\u76e3\u8996\u3092\u958b\u59cb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30ec\u30dd\u30fc\u30c8\u306f\u3001\u3069\u306e\u30e1\u30fc\u30eb\u304c\u8a8d\u8a3c\u3092\u901a\u904e\u3057\u3001\u3069\u306e\u30e1\u30fc\u30eb\u304c\u901a\u904e\u3057\u306a\u304b\u3063\u305f\u304b\u306b\u3064\u3044\u3066\u306e\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u60c5\u5831\u3092\u6ce8\u610f\u6df1\u304f\u5206\u6790\u3057\u3066\u554f\u984c\u3092\u7279\u5b9a\u3057\u3001\u30e1\u30fc\u30eb\u8a2d\u5b9a\u3092\u6700\u9069\u5316\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u969b\u3001DMARC\u5c02\u9580\u306e\u5206\u6790\u30c4\u30fc\u30eb\u304c\u5f79\u306b\u7acb\u3061\u307e\u3059\u3002<\/p>\n

    5. DMARC\u6307\u4ee4\u306e\u6bb5\u968e\u7684\u5f37\u5316<\/h3><\/p>\n

    \u30ec\u30dd\u30fc\u30c8\u306e\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u3001DMARC\u30dd\u30ea\u30b7\u30fc\u3092\u5f90\u3005\u306b\u5f37\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002p=none\"\uff08\u76e3\u8996\u306e\u307f\uff09\u304b\u3089 \"p=quarantine\"\uff08\u7591\u308f\u3057\u3044\u30e1\u30fc\u30eb\u3092\u30b9\u30d1\u30e0\u30d5\u30a9\u30eb\u30c0\u306b\u79fb\u52d5\uff09\u3001\u305d\u3057\u3066\u6700\u7d42\u7684\u306b \"p=reject\"\uff08\u8a8d\u8a3c\u3055\u308c\u3066\u3044\u306a\u3044\u30e1\u30fc\u30eb\u3092\u62d2\u5426\uff09\u3078\u3068\u79fb\u884c\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u6bb5\u968e\u7684\u306b\u5f37\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u901a\u5e38\u306e\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3078\u306e\u5f71\u97ff\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u30b9\u30e0\u30fc\u30ba\u306a\u9069\u5fdc\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n

    6. \u7d99\u7d9a\u7684\u306a\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u8abf\u6574<\/h3><\/p>\n

    DMARC\u306e\u5c0e\u5165\u306f1\u56de\u9650\u308a\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6709\u52b9\u6027\u3092\u78ba\u4fdd\u3057\u3001\u30e1\u30fc\u30eb\u30a4\u30f3\u30d5\u30e9\u306e\u5909\u5316\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u7d99\u7d9a\u7684\u306a\u76e3\u8996\u3068\u8abf\u6574\u304c\u5fc5\u8981\u3067\u3059\u3002\u5b9a\u671f\u7684\u306a\u898b\u76f4\u3057\u3068\u8abf\u6574\u306b\u3088\u308a\u3001\u65b0\u305f\u306a\u8105\u5a01\u3092\u8a8d\u8b58\u3057\u3001\u305d\u308c\u306b\u5fdc\u3058\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u66f4\u65b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    DMARC\u5b9f\u88c5\u306e\u8ab2\u984c<\/h2><\/p>\n

    DMARC\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u975e\u5e38\u306b\u5927\u304d\u3044\u304c\u3001\u5c0e\u5165\u6642\u306b\u8ab2\u984c\u304c\u751f\u3058\u308b\u3053\u3068\u3082\u3042\u308b\uff1a<\/p>\n

    \u96fb\u5b50\u30e1\u30fc\u30eb\u30a4\u30f3\u30d5\u30e9\u306e\u8907\u96d1\u3055<\/h3><\/p>\n

    \u8907\u96d1\u306a\u30e1\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u3068\u8907\u6570\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u6301\u3064\u5927\u898f\u6a21\u306a\u7d44\u7e54\u3067\u306f\u3001DMARC\u3092\u5c0e\u5165\u3059\u308b\u969b\u306b\u56f0\u96e3\u306b\u906d\u9047\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u3059\u3079\u3066\u306e\u30e1\u30fc\u30eb\u30bd\u30fc\u30b9\u3092\u7279\u5b9a\u3057\u3001\u305d\u308c\u3089\u304c\u6b63\u3057\u304f\u8a8d\u8a3c\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308b\u3002\u8a73\u7d30\u306a\u30a4\u30f3\u30d9\u30f3\u30c8\u30ea\u30fc\u3068\u8a08\u753b\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n

    \u8a2d\u5b9a\u30df\u30b9<\/h3><\/p>\n

    SPF\u3084DKIM\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u8aa4\u3063\u3066\u62d2\u5426\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u614e\u91cd\u306a\u8a2d\u5b9a\u3068\u30c6\u30b9\u30c8\u6bb5\u968e\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3001\u30d1\u30a4\u30ed\u30c3\u30c8\u6bb5\u968e\u3092\u5b9f\u65bd\u3059\u308b\u3053\u3068\u3067\u3001\u6f5c\u5728\u7684\u306a\u30a8\u30e9\u30fc\u3092\u65e9\u671f\u306b\u8a8d\u8b58\u3057\u3001\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \u7b2c\u4e09\u8005\u304b\u3089\u306eE\u30e1\u30fc\u30eb<\/h3><\/p>\n

    \u591a\u304f\u306e\u4f01\u696d\u306f\u3001E\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3084\u305d\u306e\u4ed6\u306e\u30b5\u30fc\u30d3\u30b9\u306e\u305f\u3081\u306b\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30d7\u30ed\u30d0\u30a4\u30c0\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u4e2d\u65ad\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001DMARC\u8a2d\u5b9a\u306b\u3053\u308c\u3089\u3092\u542b\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30d7\u30ed\u30d0\u30a4\u30c0\u306b\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u3001\u4e92\u63db\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u8abf\u6574\u3092\u884c\u3046\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

    \u8cc7\u6e90\u652f\u51fa<\/h3><\/p>\n

    DMARC\u306e\u5c0e\u5165\u3068\u7ba1\u7406\u306b\u306f\u6642\u9593\u3068\u30ea\u30bd\u30fc\u30b9\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u4f01\u696d\u306f\u3001\u5fc5\u8981\u306a\u5c02\u9580\u77e5\u8b58\u3068\u30c4\u30fc\u30eb\u306b\u6295\u8cc7\u3059\u308b\u6e96\u5099\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u793e\u5185\u306b\u80fd\u529b\u3092\u6301\u305f\u306a\u3044\u4e2d\u5c0f\u4f01\u696d\u306b\u3068\u3063\u3066\u306f\u7279\u306b\u96e3\u3057\u3044\u3053\u3068\u3067\u3059\u3002<\/p>\n

    DMARC\u5c0e\u5165\u6210\u529f\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2><\/p>\n

    \u8ab2\u984c\u3092\u514b\u670d\u3057\u3001DMARC\u5b9f\u88c5\u3092\u6210\u529f\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n

    \u306a\u3057\u300d\u306e\u65b9\u91dd\u3067\u30b9\u30bf\u30fc\u30c8<\/h3><\/p>\n

    DMARC\u30dd\u30ea\u30b7\u30fc\u3092\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u30e2\u30fc\u30c9\uff08\"p=none\"\uff09\u3067\u958b\u59cb\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u306a\u304f\u30c7\u30fc\u30bf\u3092\u53ce\u96c6\u3057\u3001\u554f\u984c\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6bb5\u968e\u7684\u306a\u5c0e\u5165\u306b\u3088\u308a\u3001\u8a2d\u5b9a\u30df\u30b9\u3084\u30b5\u30fc\u30d3\u30b9\u4e2d\u65ad\u306e\u30ea\u30b9\u30af\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002<\/p>\n

    DMARC\u30ec\u30dd\u30fc\u30c8\u3092\u5fb9\u5e95\u7684\u306b\u5206\u6790\u3059\u308b<\/h3><\/p>\n

    DMARC\u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u308b\u30ec\u30dd\u30fc\u30c8\u306f\u60c5\u5831\u306e\u5b9d\u5eab\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30ec\u30dd\u30fc\u30c8\u306e\u5206\u6790\u306b\u6642\u9593\u3092\u8cbb\u3084\u3057\u3001E\u30e1\u30fc\u30eb\u306e\u72b6\u6cc1\u3092\u660e\u78ba\u306b\u628a\u63e1\u3057\u3001\u6f5c\u5728\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ae\u30e3\u30c3\u30d7\u3092\u7279\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002\u5c02\u9580\u7684\u306a\u5206\u6790\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u52b9\u7387\u7684\u306b\u30c7\u30fc\u30bf\u3092\u8a55\u4fa1\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

    \u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u3068\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3<\/h3><\/p>\n

    DMARC\u306e\u5c0e\u5165\u306b\u3064\u3044\u3066\u3001\u95a2\u9023\u3059\u308b\u3059\u3079\u3066\u306e\u90e8\u7f72\u3084\u5916\u90e8\u30d1\u30fc\u30c8\u30ca\u30fc\u306b\u77e5\u3089\u305b\u308b\u3002\u3053\u308c\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u306b\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30d7\u30ed\u30d0\u30a4\u30c0\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u7279\u306b\u91cd\u8981\u3067\u3059\u3002\u660e\u78ba\u306a\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u308a\u3001\u95a2\u4fc2\u8005\u5168\u54e1\u304c\u5fc5\u8981\u306a\u8abf\u6574\u3092\u884c\u3044\u3001\u6f5c\u5728\u7684\u306a\u554f\u984c\u3092\u65e9\u671f\u306b\u8a8d\u8b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u3067DMARC\u3092\u5c0e\u5165\u3059\u308b<\/h3><\/p>\n

    \u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u3067\u5b9f\u88c5\u306b\u53d6\u308a\u7d44\u3080\u3002\u30e1\u30a4\u30f3\u30c9\u30e1\u30a4\u30f3\u306b\u79fb\u308b\u524d\u306b\u3001\u91cd\u8981\u5ea6\u306e\u4f4e\u3044\u30c9\u30e1\u30a4\u30f3\u3084\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u59cb\u3081\u308b\u3002\u3053\u306e\u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u7ba1\u7406\u3055\u308c\u305f\u5c0e\u5165\u3092\u53ef\u80fd\u306b\u3057\u3001\u554f\u984c\u306e\u7279\u5b9a\u3068\u4fee\u6b63\u3092\u5bb9\u6613\u306b\u3059\u308b\u3002<\/p>\n

    DMARC\u30c4\u30fc\u30eb\u306e\u4f7f\u7528<\/h3><\/p>\n

    DMARC\u306e\u5b9f\u88c5\u3068\u7ba1\u7406\u3092\u5bb9\u6613\u306b\u3059\u308b\u69d8\u3005\u306a\u30c4\u30fc\u30eb\u3084\u30b5\u30fc\u30d3\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u30ec\u30dd\u30fc\u30c8\u306e\u5206\u6790\u3001\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306e\u76e3\u8996\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u306e\u4f8b\u3068\u3057\u3066\u306f\u3001DMARC Analyser\u3001Valimail\u3001dmarcian\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

    \u30c1\u30fc\u30e0\u3092\u935b\u3048\u308b<\/h3><\/p>\n

    IT\u30c1\u30fc\u30e0\u3084\u305d\u306e\u4ed6\u306e\u95a2\u9023\u30b9\u30bf\u30c3\u30d5\u304cDMARC\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3092\u53d7\u3051\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002DMARC\u306e\u5c0e\u5165\u3068\u7ba1\u7406\u3092\u6210\u529f\u3055\u305b\u308b\u306b\u306f\u3001\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5341\u5206\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3084\u6559\u80b2\u306b\u3088\u308a\u3001\u30c1\u30fc\u30e0\u306f\u5e38\u306b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u6700\u65b0\u60c5\u5831\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \u5b9a\u671f\u7684\u306a\u30c1\u30a7\u30c3\u30af<\/h3><\/p>\n

    DMARC\u8a2d\u5b9a\u3092\u5b9a\u671f\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30e1\u30fc\u30eb\u306e\u72b6\u6cc1\u306f\u5e38\u306b\u5909\u5316\u3057\u3066\u304a\u308a\u3001DMARC\u306e\u8a2d\u5b9a\u3082\u305d\u308c\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5b9a\u671f\u7684\u306a\u76e3\u67fb\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u304c\u6700\u65b0\u304b\u3064\u52b9\u679c\u7684\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n

    DMARC\u3068\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u672a\u6765<\/h2><\/p>\n

    \u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u304a\u3051\u308bDMARC\u306e\u91cd\u8981\u6027\u306f\u3001\u4eca\u5f8c\u3055\u3089\u306b\u9ad8\u307e\u3063\u3066\u3044\u304f\u3067\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u30c8\u30ec\u30f3\u30c9\u3068\u52d5\u5411\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n

    \u63a1\u7528\u306e\u5897\u52a0<\/h3><\/p>\n

    \u3088\u308a\u591a\u304f\u306e\u4f01\u696d\u3084\u7d44\u7e54\u304cDMARC\u3092\u5c0e\u5165\u3057\u3001\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u304c\u5e83\u304f\u53d7\u3051\u5165\u308c\u3089\u308c\u3001\u6709\u52b9\u6027\u304c\u9ad8\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u96fb\u5b50\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u91cd\u8981\u6027\u306b\u5bfe\u3059\u308b\u8a8d\u8b58\u304c\u9ad8\u307e\u308b\u306b\u3064\u308c\u3001DMARC\u306e\u63a1\u7528\u306f\u62e1\u5927\u3057\u7d9a\u3051\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

    \u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3068\u306e\u7d71\u5408<\/h3><\/p>\n

    DMARC\u306f\u3001BIMI\uff08Brand Indicators for Message Identification\uff09\u306e\u3088\u3046\u306a\u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6280\u8853\u3068\u306e\u7d71\u5408\u304c\u9032\u3093\u3067\u304a\u308a\u3001\u30d6\u30e9\u30f3\u30c9\u306e\u53ef\u8996\u6027\u3068\u4fe1\u983c\u69cb\u7bc9\u306b\u3055\u3089\u306a\u308b\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002\u3053\u306e\u7d71\u5408\u306b\u3088\u308a\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u304a\u3051\u308b\u30d6\u30e9\u30f3\u30c9\u306e\u5b58\u5728\u611f\u3068\u53d7\u4fe1\u8005\u306e\u4fe1\u983c\u304c\u5f37\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n

    \u898f\u5236\u8981\u4ef6<\/h3><\/p>\n

    \u3088\u308a\u591a\u304f\u306e\u653f\u5e9c\u3084\u898f\u5236\u5f53\u5c40\u304c\u3001\u5b89\u5168\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u901a\u4fe1\u306e\u6a19\u6e96\u3068\u3057\u3066DMARC\u3092\u898f\u5b9a\u3059\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u308b\u3002\u7279\u306b\u3001\u91d1\u878d\u3001\u533b\u7642\u3001\u653f\u5e9c\u3068\u3044\u3063\u305f\u898f\u5236\u306e\u53b3\u3057\u3044\u696d\u754c\u3067\u306f\u3001\u305d\u306e\u50be\u5411\u304c\u5f37\u304f\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

    \u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u3055\u3089\u306a\u308b\u767a\u5c55<\/h3><\/p>\n

    DMARC\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u65b0\u305f\u306a\u8105\u5a01\u3084\u8981\u4ef6\u306b\u5bfe\u5fdc\u3057\u3001\u4f7f\u3044\u52dd\u624b\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u9032\u5316\u3057\u3066\u3044\u304f\u3068\u601d\u308f\u308c\u308b\u3002\u6a5f\u80fd\u306e\u5f37\u5316\u3068\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u306e\u5411\u4e0a\u306b\u3088\u308a\u3001DMARC\u306e\u6709\u52b9\u6027\u306f\u3055\u3089\u306b\u9ad8\u307e\u308b\u3060\u308d\u3046\u3002<\/p>\n

    \u7d50\u8ad6<\/h2><\/p>\n

    DMARC\u306e\u5c0e\u5165\u306f\u3001\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u3001\u30e1\u30fc\u30eb\u30d9\u30fc\u30b9\u306e\u8105\u5a01\u304b\u3089\u7d44\u7e54\u3092\u5b88\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002DMARC\u306e\u5c0e\u5165\u306b\u306f\u56f0\u96e3\u3082\u4f34\u3044\u307e\u3059\u304c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5411\u4e0a\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u6027\u306e\u6539\u5584\u3001\u30d6\u30e9\u30f3\u30c9\u8a55\u4fa1\u306e\u4fdd\u8b77\u306a\u3069\u3001DMARC\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u5f97\u3089\u308c\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u305d\u308c\u3092\u306f\u308b\u304b\u306b\u4e0a\u56de\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n

    \u7dbf\u5bc6\u306a\u8a08\u753b\u3001\u6bb5\u968e\u7684\u306a\u5c0e\u5165\u3001\u7d99\u7d9a\u7684\u306a\u76e3\u8996\u306b\u3088\u308a\u3001\u7d44\u7e54\u306fDMARC\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u96fb\u5b50\u30e1\u30fc\u30eb\u8a50\u6b3a\u3084\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u653b\u6483\u304c\u307e\u3059\u307e\u3059\u5de7\u5999\u5316\u3057\u3066\u3044\u308b\u73fe\u5728\u3001DMARC\u306f\u96fb\u5b50\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u6b66\u5668\u3068\u3057\u3066\u4e0d\u53ef\u6b20\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n

    DMARC\u3078\u306e\u6295\u8cc7\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3078\u306e\u6295\u8cc7\u3067\u3042\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u9867\u5ba2\u3084\u30d1\u30fc\u30c8\u30ca\u30fc\u306e\u4fe1\u983c\u3078\u306e\u6295\u8cc7\u3067\u3082\u3042\u308a\u307e\u3059\u3002\u30c7\u30b8\u30bf\u30eb\u30fb\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027\u304c\u9ad8\u307e\u308b\u4e2d\u3001DMARC\u306f\u8cb4\u793e\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u30fb\u30d7\u30ec\u30bc\u30f3\u30b9\u306e\u4fdd\u8b77\u3068\u5b8c\u5168\u6027\u306b\u3068\u3063\u3066\u6975\u3081\u3066\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n

    DMARC\u3092\u7a4d\u6975\u7684\u306b\u5c0e\u5165\u3059\u308b\u4f01\u696d\u306f\u3001\u30c7\u30b8\u30bf\u30eb\u74b0\u5883\u306b\u304a\u3051\u308b\u8cac\u4efb\u3042\u308b\u4fe1\u983c\u3067\u304d\u308b\u30d7\u30ec\u30a4\u30e4\u30fc\u3068\u3057\u3066\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u4fe1\u983c\u304c\u6700\u91cd\u8981\u8996\u3055\u308c\u308b\u4e16\u754c\u306b\u304a\u3044\u3066\u3001DMARC\u306f\u3088\u308a\u5b89\u5168\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30e1\u30fc\u30eb\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u91cd\u8981\u306a\u4e00\u6b69\u3067\u3059\u3002<\/p>\n

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