{"id":1985,"date":"2018-04-01T07:40:18","date_gmt":"2018-03-31T22:40:18","guid":{"rendered":"https:\/\/www.dekyo.or.jp\/info\/?p=1985"},"modified":"2019-02-05T16:12:10","modified_gmt":"2019-02-05T07:12:10","slug":"post-1985","status":"publish","type":"post","link":"https:\/\/www.dekyo.or.jp\/info\/2018\/04\/security\/1985\/","title":{"rendered":"\u3044\u307e\u6ce8\u76ee\u3055\u308c\u308b\u300cDMARC\u300d"},"content":{"rendered":"\n

\u6771\u4eac\u8fb2\u5de5\u5927\u5b66 \u5927\u5b66\u9662\u5de5\u5b66\u7814\u7a76\u9662 \u52a9\u6559
\u5317\u5ddd \u76f4\u54c9<\/p>\n\n\n\n

<\/div>\n\n\n\n

\uff11\uff0e\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n

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\u3000\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u653b\u6483\u8005\u306f\u3001\u672c\u6765\u306e\u9001\u4fe1\u8005\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u69d8\u3005\u306a\u624b\u6bb5\u3067\u306a\u308a\u3059\u307e\u3057\u3066\u9001\u4fe1\u3059\u308b\u3002\u305d\u306e\u4ee3\u8868\u7684\u306a\u624b\u53e3\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e3\u3064\u306e\u65b9\u6cd5\u304c\u6319\u3052\u3089\u308c\u308b\u3002<\/p>\n\n\n\n

  1. \u8868\u793a\u540d\uff08\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u30cd\u30fc\u30e0\uff09\u3092\u8a50\u79f0\u3059\u308b<\/li>
  2. \u672c\u7269\u306e\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3068\u985e\u4f3c\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u4f7f\u7528\u3059\u308b<\/li>
  3. \u672c\u7269\u306e\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u8a50\u79f0\u3059\u308b<\/li><\/ol>\n\n\n\n

    1\uff0e\u306e\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u30cd\u30fc\u30e0\u306e\u8a50\u79f0\u306f\u3001\u53d7\u4fe1\u8005\u306e\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u4e0a\u3067\u8868\u793a\u3055\u308c\u308b\u9001\u4fe1\u8005\u306e\u8868\u793a\u540d\uff08\u500b\u4eba\u540d\u3084\u6cd5\u4eba\u540d\u306a\u3069\uff09\u3092\u507d\u3063\u3066\u8a18\u8ff0\u3059\u308b\u624b\u53e3\u3067\u3042\u308a\u3001\u6700\u3082\u5bb9\u6613\u306b\u8a50\u79f0\u304c\u53ef\u80fd\u306a\u65b9\u6cd5\u3067\u3042\u308b\u3002\u3053\u306e\u624b\u53e3\u306f\u3001\u653b\u6483\u8005\u306f\u30d5\u30ea\u30fc\u30e1\u30fc\u30eb\uff08Gmail\u3084Yahoo!\u30e1\u30fc\u30eb\u306a\u3069\uff09\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u53d6\u5f97\u3057\u3066\u9001\u4fe1\u3055\u308c\u308b\u5834\u5408\u3084\u3001\u653b\u6483\u8005\u304c\u72ec\u81ea\u306b\u53d6\u5f97\u3057\u305f\u7121\u95a2\u4fc2\u306a\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u5927\u91cf\u306b\u81ea\u52d5\u751f\u6210\u3057\u305f\u30e9\u30f3\u30c0\u30e0\u306a\u6587\u5b57\u5217\u306e\u7f85\u5217\u3067\u3042\u308b\u3053\u3068\u304c\u591a\u3044\uff09\u3092\u7528\u3044\u3066\u9001\u4fe1\u3059\u308b\u5834\u5408\u304c\u591a\u3044\u304c\u3001\u4ee5\u964d\u3067\u89e3\u8aac\u3059\u308b2.\u30843.\u306e\u624b\u53e3\u306b\u304a\u3044\u3066\u3082\u3001\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u30cd\u30fc\u30e0\u3082\u5408\u308f\u305b\u3066\u8a50\u79f0\u3059\u308b\u5834\u5408\u304c\u591a\u3044\u3002<\/p>\n\n\n\n

    2\uff0e\u306e\u672c\u7269\u306e\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3068\u985e\u4f3c\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u30db\u30e2\u30b0\u30e9\u30d5\u30c9\u30e1\u30a4\u30f3\u3084\u30ab\u30ba\u30f3\u30c9\u30e1\u30a4\u30f3\u306a\u3069\u3068\u547c\u3070\u308c\u308b\uff09\u3092\u4f7f\u7528\u3057\u305f\u306a\u308a\u3059\u307e\u3057\u65b9\u6cd5\u3067\u306f\u3001\u4eba\u9593\u304c\u6587\u5b57\u5217\u306e\u9055\u3044\u3092\u898b\u5206\u3051\u308b\u306e\u304c\u96e3\u3057\u3044\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u4f8b\uff1a\uff08\u6b63\uff09example.com\uff08\u8aa4\uff09examp1e.com\u306a\u3069\uff09\u3084\u3001\u672c\u7269\u3068\u306f\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u30c9\u30e1\u30a4\u30f3\u304c\u7570\u306a\u308b\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u4f8b\uff1a\uff08\u6b63\uff09example.com\uff08\u8aa4\uff09example.net\u306a\u3069\uff09\u306a\u3069\u3092\u3042\u3089\u304b\u3058\u3081\u53d6\u5f97\u3057\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3067\u751f\u6210\u3057\u305f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u624b\u53e3\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

    3\uff0e\u306e\u672c\u7269\u306e\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u8a50\u79f0\u3057\u3066\u9001\u4fe1\u3055\u308c\u308b\u306a\u308a\u3059\u307e\u3057\u306f\u3001\u672c\u7269\u3068\u306f\u7570\u306a\u308b\u30db\u30b9\u30c8\u304b\u3089\u672c\u7269\u306e\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u507d\u3063\u3066\u9001\u4fe1\u3059\u308b\u624b\u53e3\u3067\u3042\u308b\u3002\u3053\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3059\u308bDMARC \uff08Domain-based MessageAuthentication, Reporting & Conformance\uff09 \u3068\u3001\u3053\u308c\u306b\u6df1\u304f\u95a2\u4fc2\u3059\u308bSPF\uff08Sender Policy Framework\uff09\u304a\u3088\u3073DKIM\uff08Domainkeys Identified Mail\uff09\u306e2\u3064\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u3001\u3044\u305a\u308c\u3082\u3053\u306e\u624b\u53e3\u306b\u5bfe\u3057\u3066\u6709\u52b9\u306a\u8a8d\u8a3c\u6280\u8853\u3067\u3042\u308a\u30011\uff0e\u30842\uff0e\u306e\u624b\u53e3\u3092\u7528\u3044\u305f\u306a\u308a\u3059\u307e\u3057\u3092\u9632\u3050\u3082\u306e\u3067\u306f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3055\u308c\u305f\u3044\u3002<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    \uff12\uff0e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853<\/h2>\n\n\n\n

    \u3000DMARC\u306f\u3001\u73fe\u5728\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308bSPF\uff08SenderPolicy Framework\uff09 \u3068DKIM\uff08Domainkeys IdentifiedMail\uff09\u306e\u3069\u3061\u3089\u306e\u8a8d\u8a3c\u306b\u3082\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306b\u5bfe\u3057\u3066\u3001\u53d7\u4fe1\u30b5\u30fc\u30d0\u304c\u3069\u306e\u3088\u3046\u306b\u51e6\u7406\u3059\u308b\u3079\u304d\u304b\u3092\u3001\u9001\u4fe1\u5074\u30c9\u30e1\u30a4\u30f3\u306e\u7ba1\u7406\u8005\u304c\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3042\u308b\u3002\u307e\u305a\u3001DMARC\u3067\u5229\u7528\u3055\u308c\u308bSPF\u3068DKIM\u306e2\u3064\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u306b\u3064\u3044\u3066\u8aac\u660e\u3059\u308b\u3002<\/p>\n\n\n\n

    2.1\u3000SPF<\/h3>\n\n\n\n

    \u3000SPF\uff08Sender Policy Framework\uff09\u306f\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u5074\u30c9\u30e1\u30a4\u30f3\u540d\u306e\u6b63\u5f53\u6027\u3092\u691c\u8a3c\u3059\u308b\u6a5f\u69cb\u3068\u3057\u3066\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u3002\u9001\u4fe1\u5074\u306e\u7ba1\u7406\u8005\u306f\u3001\u3042\u3089\u304b\u3058\u3081\u81ea\u30c9\u30e1\u30a4\u30f3\u306eDNS\u6a29\u5a01\u30b5\u30fc\u30d0\u3067SPF\u30ec\u30b3\u30fc\u30c9\u3092\u516c\u958b\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308b\u3002SPF\u30ec\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30ec\u30b3\u30fc\u30c9\u3092\u516c\u958b\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308bSMTP\uff08Simple Mail TransferProtocol\uff09\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u306e\u30ea\u30b9\u30c8\u3092\u5ba3\u8a00\u3059\u308b\u3002<\/p>\n\n\n\n

    \u3000\u56f31\u306b\u3001\u53d7\u4fe1\u30b5\u30fc\u30d0\u304csender@example.com\u304b\u3089\u306e\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3057\u305f\u5834\u5408\u306eSPF\u306b\u3088\u308b\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u6d41\u308c\u3092\u793a\u3059\u3002<\/p>\n\n\n\n

    \"\"
    \u56f3\uff11\uff1aSPF\u691c\u8a3c\u306e\u6d41\u308c<\/figcaption><\/figure>\n\n\n\n
    <\/div>\n\n\n\n

    \u3000\u3053\u306e\u4f8b\u3067\u306f\u3001\u9001\u4fe1\u5074\u306f\u300cexample.com\u3068\u3044\u3046\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f192.0.2.0\/24\u306e\u30a2\u30c9\u30ec\u30b9\u30d6\u30ed\u30c3\u30af\u306b\u542b\u307e\u308c\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u30db\u30b9\u30c8\u304b\u3089\u9001\u4fe1\u3059\u308b\u300d\u65e8\u3092\u5ba3\u8a00\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059\u3002\u53d7\u4fe1\u5074\u3067\u306f\u3001example.com\u304b\u3089\u306e\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u3068\u3001\u5f53\u8a72\u30c9\u30e1\u30a4\u30f3\u540d\u306eDNS\u6a29\u5a01\u30b5\u30fc\u30d0\u306bSPF\u30ec\u30b3\u30fc\u30c9\u3092\u554f\u3044\u5408\u308f\u305b\u3066\u60c5\u5831\u3092\u53d6\u5f97\u3057\u3001\u305d\u306e\u9001\u4fe1\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068\u6bd4\u8f03\u3059\u308b\u3002\u56f31\u306e\u4f8b\u3067\u306f\u3001\u3053\u306e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u305fSMTP\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u306f\u300c192.0.2.1\u300d\u3067\u3042\u308a\u3001SPF\u30ec\u30b3\u30fc\u30c9\u3067\u5ba3\u8a00\u3055\u308c\u305f\u300c192.0.2.0\/24\u300d\u306e\u30a2\u30c9\u30ec\u30b9\u30d6\u30ed\u30c3\u30af\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u305f\u3081\u3001SPF\u691c\u8a3c\u306f\u6210\u529f\u3059\u308b\u3002<\/p>\n\n\n\n

    \u3000SPF\u306f\u3053\u306e\u3088\u3046\u306a\u6d41\u308c\u3067\u6b63\u5f53\u306a\u9001\u4fe1\u30b5\u30fc\u30d0\u306e\u691c\u8a3c\u3092\u884c\u3046\u3057\u304f\u307f\u3068\u3057\u3066\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u304c\u3001\u56f32\u306b\u793a\u3059\u3088\u3046\u306b\u30e1\u30fc\u30eb\u304c\u8ee2\u9001\u3055\u308c\u305f\u5834\u5408\u306b\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3067\u306f\u306a\u3044\u914d\u9001\u3067\u3042\u308b\u306b\u3082\u95a2\u308f\u3089\u305a\u691c\u8a3c\u306b\u5931\u6557\u3057\u3066\u3057\u307e\u3046\u5f31\u70b9\u3092\u6301\u3063\u3066\u3044\u308b\u3002<\/p>\n\n\n\n

    \u3000\u56f32\u306e\u4f8b\u3067\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u304c192.0.2.1\u3067\u3042\u308bSMTP\u30b5\u30fc\u30d0\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u304c198.51.100.1\u3067\u3042\u308b\u30b5\u30fc\u30d0\u306b\u8ee2\u9001\u3055\u308c\u305f\u5f8c\u306b\u53d7\u4fe1\u8005\u306b\u9001\u4fe1\u3055\u308c\u3066\u3044\u308b\u3002\u3053\u306e\u5834\u5408\u3001\u9001\u4fe1\u8005\u306e\u30a2\u30c9\u30ec\u30b9\uff08Envelope-From\u30a2\u30c9\u30ec\u30b9\uff09\u306f\u5909\u5316\u3057\u306a\u3044\u304c\u3001\u53d7\u4fe1\u30b5\u30fc\u30d0\u304b\u3089\u898b\u305f\u9001\u4fe1\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u306f198.51.100.1\u3068\u306a\u308a\u3001SPF\u30ec\u30b3\u30fc\u30c9\u3067\u793a\u3055\u308c\u305fIP\u30a2\u30c9\u30ec\u30b9\u30d6\u30ed\u30c3\u30af\u306b\u542b\u307e\u308c\u306a\u3044\u3053\u3068\u304b\u3089\u3001SPF\u691c\u8a3c\u306f\u5931\u6557\u3068\u306a\u308b\u3002<\/p>\n\n\n\n

    \"\"
    \u56f3\uff12\uff1a\u8ee2\u9001\u306b\u3088\u308bSPF\u691c\u8a3c\u306e\u5931\u6557\u4f8b<\/figcaption><\/figure>\n\n\n\n
    <\/div>\n\n\n\n

    2.2\u3000DKIM<\/h3>\n\n\n\n

    \u3000DKIM\uff08Domainkeys Identified Mail\uff09\u306f\u3001\u96fb\u5b50\u7f72\u540d\u3092\u7528\u3044\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u6a5f\u69cb\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u3002DKIM\u306b\u3088\u308b\u691c\u8a3c\u3067\u306f\u3001\u9001\u4fe1\u5074\u3067\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30d8\u30c3\u30c0\u3068\u672c\u6587\u304b\u3089\u751f\u6210\u3057\u305f\u96fb\u5b50\u7f72\u540d\u3092\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u4ed8\u52a0\u3057\u3066\u9001\u4fe1\u3057\u3001\u53d7\u4fe1\u5074\u3067\u305d\u306e\u96fb\u5b50\u7f72\u540d\u3092\u7167\u5408\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u884c\u3046\u3002\u3053\u306e\u305f\u3081DKIM\u306fSPF\u3068\u306f\u7570\u306a\u308a\u3001\u4e2d\u7d99\u3059\u308bMTA\uff08\u30e1\u30fc\u30eb\u8ee2\u9001\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\uff09\u3067\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30c7\u30fc\u30bf\u304c\u5909\u66f4\u3055\u308c\u306a\u3044\u9650\u308a\u3001\u8ee2\u9001\u30e1\u30fc\u30eb\u3067\u3042\u3063\u3066\u3082\u8ee2\u9001\u5148\u3067\u6b63\u3057\u304f\u8a8d\u8a3c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n

    \u3000DKIM\u306b\u3088\u308b\u691c\u8a3c\u306e\u6d41\u308c\u3092\u56f33\u306b\u793a\u3059\u3002<\/p>\n\n\n\n


    <\/p>\n\n\n\n

    \"\"
    \u56f3\uff13\uff1aDKIM\u691c\u8a3c\u306e\u6d41\u308c<\/figcaption><\/figure>\n\n\n\n
    <\/div>\n\n\n\n

    \u3000\u9001\u4fe1\u5074\u306f\u3042\u3089\u304b\u3058\u3081\u3001\u7f72\u540d\u306b\u4f7f\u7528\u3059\u308b\u79d8\u5bc6\u9375\u3068\u5bfe\u306b\u306a\u308b\u516c\u958b\u9375\u3092DNS\u6a29\u5a01\u30b5\u30fc\u30d0\u3067\u516c\u958b\u3057\u3066\u304a\u304f\uff08\u56f33\uff0d\u2460\uff09\u3002
    \u3000\u9001\u4fe1\u5074\u304c\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u969b\u306b\u306f\u3001\u30e1\u30fc\u30eb\u306e\u672c\u6587\u3068\u30d8\u30c3\u30c0\u3092\u5143\u306b\u4f5c\u6210\u3057\u305f\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u4e0e\u3057\u3066\u9001\u4fe1\u3059\u308b\uff08\u56f33\uff0d\u2461\uff09\u3002\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3067\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u3068\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u4e2d\u306e\u300cDKIM-Signature\u300d\u5185\u306e\u300c\uff44=\u30bf\u30b0\u300d\u3067\u6307\u5b9a\u3055\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u540d\u306eDNS\u6a29\u5a01\u30b5\u30fc\u30d0\u306b\u5bfe\u3057\u3066\u516c\u958b\u9375\u3092\u554f\u3044\u5408\u308f\u305b\u308b\uff08\u56f33\uff0d\u2462\uff09\u3002\u305f\u3060\u3057\u3001\u9001\u4fe1\u5074\u304c\uff44=\u30bf\u30b0\u3067\u6307\u5b9a\u3059\u308b\u30c9\u30e1\u30a4\u30f3\u540d\u306f\u30e1\u30fc\u30eb\u9001\u4fe1\u30b5\u30fc\u30d0\u3068\u540c\u4e00\u3067\u306a\u304f\u3066\u3082\u3088\u304f\u3001\u7b2c\u4e09\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3042\u308b\u3002\u4f8b\u3048\u3070\u3001\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304cexample.com\u306e\u5834\u5408\u3067\u3082\u3001\uff44=\u30bf\u30b0\u3067\u306fexample.net\u7b49\u3001\u4efb\u610f\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u6b21\u306b\u3001\u53d7\u4fe1\u5074\u306f\u516c\u958b\u9375\u3092\u53d6\u5f97\u3059\u308b\u3068\uff08\u56f33\uff0d\u2463\uff09\u3001\u305d\u306e\u516c\u958b\u9375\u3092\u7528\u3044\u3066\u96fb\u5b50\u7f72\u540d\u3092\u7167\u5408\u3057\u3001DKIM\u691c\u8a3c\u3092\u5b9f\u65bd\u3059\u308b\uff08\u56f33\uff0d\u2464\uff09\u3002<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    \uff13\uff0eDMARC<\/h2>\n\n\n\n

    \u3000DMARC\uff08Domain-based Message Authentication,Reporting & Conformance\uff09\u306f\u30012\u7bc0\u3067\u89e3\u8aac\u3057\u305f2\u3064\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\uff08SPF\u30fbDKIM\uff09\u3092\u7528\u3044\u305f\u30ec\u30dd\u30fc\u30c6\u30a3\u30f3\u30b0\u304a\u3088\u3073\u30dd\u30ea\u30b7\u5236\u5fa1\u306e\u4ed5\u7d44\u307f\u3067\u3001\u6b27\u7c73\u3092\u4e2d\u5fc3\u306b\u8fd1\u5e74\u6025\u901f\u306b\u666e\u53ca\u304c\u5e83\u304c\u3063\u3066\u3044\u308b\u6280\u8853\u3067\u3042\u308b\u3002DMARC\u306f\u3001SPF\u3084DKIM\u306e\u3088\u3046\u306a\u76f4\u63a5\u7684\u306a\u8a8d\u8a3c\u6280\u8853\u3068\u306f\u7570\u306a\u308a\u3001SPF\u3068DKIM\u3092\u5229\u7528\u3057\u3066\u3001\u3069\u3061\u3089\u306e\u691c\u8a3c\u306b\u3082\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306b\u5bfe\u3057\u3066\u3001\u53d7\u4fe1\u5074\u304c\u3069\u306e\u3088\u3046\u306b\u53d6\u308a\u6271\u3046\u304b\u306e\u65b9\u91dd\u3092\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u7ba1\u7406\u8005\u5074\u304c\u5ba3\u8a00\u3059\u308b\u305f\u3081\u306e\u6a5f\u69cb\u3067\u3042\u308b\u3002\u3053\u306e\u305f\u3081\u3001DMARC\u306f\u53d7\u4fe1\u5074\u306b\u304a\u3051\u308b\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u53d7\u4fe1\u5bfe\u7b56\u3067\u306f\u306a\u304f\u3001\u9001\u4fe1\u5074\u306e\u30c9\u30e1\u30a4\u30f3\u7ba1\u7406\u8005\u304c\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u8a50\u79f0\u3057\u305f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3055\u308c\u306b\u304f\u304f\u3059\u308b\u3053\u3068\u3067\u3001\u81ea\u30c9\u30e1\u30a4\u30f3\u306e\u30d6\u30e9\u30f3\u30c9\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306e\u6280\u8853\u3067\u3042\u308b\u3068\u8a00\u3048\u308b\u3002<\/p>\n\n\n\n

    \u3000DMARC\u306b\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u5236\u5fa1\u30dd\u30ea\u30b7\u306b\u5f93\u3063\u305f\u30e1\u30fc\u30eb\u914d\u9001\u5236\u5fa1\u306e\u65b9\u6cd5\u3092\u5ba3\u8a00\u3059\u308b\u6a5f\u80fd\u306b\u52a0\u3048\u3066\u3001\u30ec\u30dd\u30fc\u30c6\u30a3\u30f3\u30b0\u6a5f\u80fd\u304c\u3042\u308b\u3002\u30ec\u30dd\u30fc\u30c6\u30a3\u30f3\u30b0\u6a5f\u80fd\u3067\u306f\u3001\u81ea\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u540d\u4e57\u3063\u3066\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306e\u50be\u5411\u306e\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u3084\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u7ba1\u7406\u8005\u306f\u81ea\u30c9\u30e1\u30a4\u30f3\u540d\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u52b9\u679c\u306e\u72b6\u6cc1\u3084\u3001\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u9a19\u3063\u3066\u9001\u4fe1\u3055\u308c\u305f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306e\u72b6\u6cc1\u3092\u628a\u63e1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n

    \u3000DMARC\u3092\u5229\u7528\u3059\u308b\u306b\u306f\u3001\u9001\u4fe1\u5074\u3068\u53d7\u4fe1\u5074\u3067\u305d\u308c\u305e\u308c\u6b21\u306e\u3088\u3046\u306b\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u307e\u305a\u9001\u4fe1\u5074\u3067\u306f\u3001SPF\u304a\u3088\u3073DKIM\u306e\u4e21\u65b9\u3001\u3042\u308b\u3044\u306f\u3044\u305a\u308c\u304b\u4e00\u65b9\u306b\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u3053\u308c\u306b\u52a0\u3048\u3066\u3001\u9001\u4fe1\u5074\u3067\u306f\u81ea\u30c9\u30e1\u30a4\u30f3\u540d\u306e\u5148\u982d\u306b\u300c_dmarc.\u300d\u3092\u8ca0\u8377\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u56f36\u306e\u4f8b\u3067\u306f_dmarc.example.com\uff09 \u306eTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066DMARC\u30ec\u30b3\u30fc\u30c9\u3092\u516c\u958b\u3059\u308b\u3002DMARC\u30ec\u30b3\u30fc\u30c9\u5185\u306e\u300c\uff50=\u30bf\u30b0\u300d\u3067\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\uff08SPF\u30fbDKIM\uff09\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306b\u5bfe\u3059\u308b\u53d7\u4fe1\u5074\u306e\u51e6\u7406\u30dd\u30ea\u30b7\u3092\u5ba3\u8a00\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u5ba3\u8a00\u53ef\u80fd\u306a\u51e6\u7406\u30dd\u30ea\u30b7\u306f\u6b21\u306e3\u7a2e\u985e\u304c\u3042\u308b\u3002<\/p>\n\n\n\n

    • none\uff08\u51e6\u7406\u65b9\u6cd5\u3092\u6307\u5b9a\u3057\u306a\u3044\uff09<\/li>
    • quarantine\uff08\u9694\u96e2\u3059\u308b\uff09<\/li>
    • reject\uff08\u53d7\u4fe1\u62d2\u5426\u3059\u308b\uff09<\/li><\/ul>\n\n\n\n

      \u3000\u3053\u308c\u3089\u306e\u51e6\u7406\u30dd\u30ea\u30b7\u306f\u3042\u304f\u307e\u3067\u9001\u4fe1\u5074\u304c\u5ba3\u8a00\u3059\u308b\u3082\u306e\u3067\u3042\u308b\u305f\u3081\u3001\u53d7\u4fe1\u5074\u3067\u306e\u5b9f\u969b\u306e\u51e6\u7406\u306f\u904b\u7528\u65b9\u91dd\u306b\u3088\u3063\u3066\u3055\u307e\u3056\u307e\u3067\u3042\u308b\u3002\u4f8b\u3048\u3070\u51e6\u7406\u30dd\u30ea\u30b7\u304cquarantine\u306e\u5834\u5408\u3001\u53d7\u4fe1\u5074\u3067\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u9694\u96e2\u3059\u308b\u904b\u7528\u304c\u8003\u3048\u3089\u308c\u308b\u3002\u307e\u305f\u3001\u51e6\u7406\u30dd\u30ea\u30b7\u304cnone\u306e\u5834\u5408\u3001\u53d7\u4fe1\u8005\u306f\u901a\u5e38\u901a\u308a\u306b\u53d7\u4fe1\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u305f\u3081DMARC\u5c0e\u5165\u306b\u3088\u308b\u53d7\u4fe1\u62d2\u5426\u52b9\u679c\u306f\u306a\u3044\u304c\u3001\u9001\u4fe1\u5074\u3067\u306f\u30ec\u30dd\u30fc\u30c6\u30a3\u30f3\u30b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u3066\u96c6\u7d04\u60c5\u5831\u3084\u8a8d\u8a3c\u5931\u6557\u60c5\u5831\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n

      \u3000DMARC\u691c\u8a3c\u306e\u6d41\u308c\u3092\u56f34\u306b\u793a\u3059\u3002<\/p>\n\n\n\n

      \"\"
      \u56f3\uff14\uff1aDMARC\u691c\u8a3c<\/figcaption><\/figure>\n\n\n\n
      <\/div>\n\n\n\n

      \u3000\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3067\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u3068\u3001\u307e\u305a\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\uff08SPF\u30fbDKIM\uff09\u3092\u5b9f\u65bd\u3059\u308b\u3002\u3053\u308c\u3089\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u4e21\u65b9\u306b\u5931\u6557\u3057\u305f\u5834\u5408\u3001\u9001\u4fe1\u5074\u304c\u516c\u958b\u3057\u3066\u3044\u308bDMARC\u30dd\u30ea\u30b7\uff08\u56f34\u3067\u306freject\uff09\u304c\u9069\u7528\u3055\u308c\u308b\u3002\u307e\u305f\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u304c\u300cruf\u30bf\u30b0\u300d\u3067\u6307\u5b9a\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\uff08\u56f34\u3067\u306frufreport@example.com\uff09\u306b\u5bfe\u3057\u3066\u9001\u4fe1\u3055\u308c\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u306f\u300crua\u30bf\u30b0\u300d\u3067\u6307\u5b9a\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\uff08\u56f34\u3067\u306fruareport@example.com\uff09\u306b\u5bfe\u3057\u3066\u9001\u4fe1\u3055\u308c\u308b\u3002<\/p>\n\n\n\n

      \u3000\u307e\u305f\u30012\u7bc0\u3067\u8ff0\u3079\u305f\u3088\u3046\u306b\u3001DKIM\u3067\u306f\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u306f\u7121\u95a2\u4fc2\u306a\u7b2c\u4e09\u8005\u30c9\u30e1\u30a4\u30f3\u306b\u3088\u308b\u7f72\u540d\u304c\u53ef\u80fd\u3067\u3042\u308b\u304c\u3001\u305d\u306e\u7f72\u540d\u30c9\u30e1\u30a4\u30f3\u304c\u6b63\u5f53\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u306e\u306f\u6975\u3081\u3066\u56f0\u96e3\u3067\u3042\u308b\u306e\u304c\u73fe\u72b6\u3067\u3042\u308b\u3002\u3053\u306e\u554f\u984c\u306b\u5bfe\u3057\u3066\u3001DMARC\u3067\u306f\u30a2\u30e9\u30a4\u30f3\u30e1\u30f3\u30c8\u3068\u547c\u3070\u308c\u308b\u8003\u3048\u65b9\u304c\u5b58\u5728\u3057\u3001\u7b2c\u4e09\u8005\u7f72\u540d\u3092\u7981\u6b62\u3057\u3066\u3044\u308b\u3002\u3059\u306a\u308f\u3061\u3001\u7b2c\u4e09\u8005\u7f72\u540d\u306b\u3088\u3063\u3066DKIM\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306e\u914d\u9001\u3067\u306f\u3001DKIM\u691c\u8a3c\u3067\u306f\u8a8d\u8a3c\u6210\u529f\u3068\u306a\u308b\u5834\u5408\u3067\u3082\u3001DMARC\u3067\u306f\u8a8d\u8a3c\u5931\u6557\u3068\u306a\u308b\u3002<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      \uff14\uff0eDMARC\u30ec\u30b3\u30fc\u30c9\u306e\u8a73\u7d30<\/h2>\n\n\n\n

      \u3000DMARC\u30ec\u30b3\u30fc\u30c9\u306f\u3001\u56f34\u306eDMARC\u30ec\u30b3\u30fc\u30c9\u306e\u8a18\u8ff0\u4f8b\u306b\u793a\u3057\u305f\u901a\u308a\u3001\u5404\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u9593\u3092\u30bb\u30df\u30b3\u30ed\u30f3\u3067\u533a\u5207\u3063\u3066\u8a18\u8ff0\u3059\u308b\u3002\u56f34\u306e\u4f8b\u3067\u306f\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u60c5\u5831\uff08\uff56\uff09\u3001\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u52d5\u4f5c\u30dd\u30ea\u30b7\uff08\uff50\uff09\u3001\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4fe1\u5148\uff08rua\uff09\u3001\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4fe1\u5148\uff08ruf\uff09\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8a18\u8ff0\u3057\u305fDMARC\u30ec\u30b3\u30fc\u30c9\u306e\u4f8b\u3092\u793a\u3057\u305f\u304c\u3001\u3053\u308c\u4ee5\u5916\u306b\u3082\u69d8\u3005\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5b58\u5728\u3057\u3001\u8a73\u7d30\u306a\u8a2d\u5b9a\u304c\u53ef\u80fd\u3067\u3042\u308b\u3002
      \u3053\u308c\u3089\u306e\u6982\u8981\u3092\u88681\u306b\u793a\u3059\u3002<\/p>\n\n\n\n

      \"\"
      \u8868\uff11\uff1aDMARC\u30ec\u30dd\u30fc\u30c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf<\/figcaption><\/figure>\n\n\n\n
      <\/div>\n\n\n\n

      \u3000adkim\u304a\u3088\u3073aspf\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u3044\u305a\u308c\u3082DKIM\u304a\u3088\u3073SPF\u8a8d\u8a3c\u306b\u304a\u3051\u308b\u30a2\u30e9\u30a4\u30f3\u30e1\u30f3\u30c8\u30e2\u30fc\u30c9\u3092\u793a\u3057\u3001relaxed mode\uff08r\uff09\u304bstrict mode\uff08s\uff09\u306e\u3044\u305a\u308c\u304b\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3002relaxed mode\u306f\u3001DKIM\u307e\u305f\u306fSPF\u3067\u8a8d\u8a3c\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u3068\u30d8\u30c3\u30c0From\u30c9\u30e1\u30a4\u30f3\u306e\u7d44\u7e54\u304c\u540c\u3058\u3067\u3042\u308c\u3070\u826f\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u3001\u7d44\u7e54\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u540c\u4e00\u3067\u3042\u308c\u3070\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067\u3082\u8a31\u53ef\u3059\u308b\u8a2d\u5b9a\u3067\u3042\u308b\u3002\u4e00\u65b9\u3001strictmode\u3067\u306f\u3001\u5b8c\u5168\u306b\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3002\u3059\u306a\u308f\u3061\u3001\u3044\u305a\u308c\u306e\u5834\u5408\u3067\u3082DKIM\u3068\u306f\u7570\u306a\u308a\u3001\u7d44\u7e54\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u7570\u306a\u308b\u7f72\u540d\u306f\u8a8d\u3081\u3089\u308c\u306a\u3044\u3002<\/p>\n\n\n\n

      \u3000fo\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u3092\u9001\u4fe1\u3059\u308b\u6761\u4ef6\u3092\u8a73\u7d30\u306b\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u3042\u308b\u3002pct\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u306f\u3001DMARC\u30dd\u30ea\u30b7\u3092\u9069\u7528\u3059\u308b\u5272\u5408\uff08\uff05\uff09\u3092\u6307\u5b9a\u3059\u308b\u3002rf\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u306f\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u6307\u5b9a\u3059\u308b\u304c\u3001\u73fe\u5728\u306e\u3068\u3053\u308dafrf\uff08Authentication Failure Reporting Format\uff09\u306e\u307f\u304c\u6307\u5b9a\u53ef\u80fd\u3067\u3042\u308b\u3002ri\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u306f\u3001\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u9001\u4fe1\u306e\u6700\u5927\u9593\u9694\u6642\u9593\uff08\u79d2\uff09\u3092\u6307\u5b9a\u3059\u308b\u3002sp\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u306f\u3001\u5168\u3066\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u5bfe\u3059\u308bDMARC\u30dd\u30ea\u30b7\u3092\u6307\u5b9a\u3059\u308b\u3002\u8a2d\u5b9a\u53ef\u80fd\u306a\u5024\u306f\u3001\uff50\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u540c\u69d8\u306b\u3001none, quarantine, reject\u306e3\u7a2e\u985e\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      \u307e\u3068\u3081<\/h2>\n\n\n\n

      \u3000DMARC\u306f\u5f93\u6765\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3068\u306f\u7570\u306a\u308a\u3001\u9001\u4fe1\u5074\u306e\u30c9\u30e1\u30a4\u30f3\u7ba1\u7406\u8005\u304c\u53d7\u4fe1\u8005\u306b\u5bfe\u3057\u3066\u53d7\u4fe1\u30dd\u30ea\u30b7\u3092\u6307\u5b9a\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3042\u308b\u3002\u6d77\u5916\u3067\u306f\u5927\u624b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u3092\u4e2d\u5fc3\u306b\u3001DMARC\u30dd\u30ea\u30b7\u3092\u6700\u3082\u5f37\u3044\u5ba3\u8a00\u3067\u3042\u308breject\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u4f8b\u304c\u591a\u304f\u898b\u3089\u308c\u308b\u304c\u3001\u7279\u306b\u56fd\u5185\u3067\u306f\u307b\u3068\u3093\u3069\u306e\u30c9\u30e1\u30a4\u30f3\u3067none\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u308a\u3001\u5c0e\u5165\u306b\u95a2\u3057\u3066\u614e\u91cd\u306a\u59ff\u52e2\u304c\u898b\u53d7\u3051\u3089\u308c\u308b\u3002\u5b9f\u969b\u306b\u3001\u7b46\u8005\u304c\u884c\u306a\u3063\u305f\u8abf\u67fb\u3067\u306f\u3001DMARC\u30dd\u30ea\u30b7\u3092\u516c\u958b\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306e\u3046\u3061\u3001\u304a\u3088\u305d80%\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u51e6\u7406\u30dd\u30ea\u30b7\u3092none\u3068\u3057\u3066\u516c\u958b\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u306f\u3001DMARC\u30dd\u30ea\u30b7\u3092reject\u3084quarantine\u306b\u8a2d\u5b9a\u3057\u305f\u969b\u306b\u767a\u751f\u3059\u308b\u8aa4\u5224\u5b9a\uff08False Positive\uff09\u3092\u9632\u3050\u305f\u3081\u306b\u614e\u91cd\u306a\u8a2d\u5b9a\u3068\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u306e\u304c\u73fe\u72b6\u3067\u3042\u308b\u3068\u8a00\u3048\u308b\u304c\u3001\u4eca\u5f8c\u306e\u52d5\u5411\u306e\u5909\u5316\u306b\u3082\u6ce8\u76ee\u3057\u3066\u3044\u304f\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n

      \u3000\u307e\u305f\u3001DMARC\u5c0e\u5165\u306e\u91cd\u8981\u306a\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u3001DMARC\u30ec\u30dd\u30fc\u30c8\u306e\u5206\u6790\u306b\u3088\u3063\u3066\u3001\u3053\u308c\u307e\u3067\u5f97\u3089\u308c\u306a\u304b\u3063\u305f\u81ea\u30c9\u30e1\u30a4\u30f3\u3067\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u72b6\u6cc1\u3084\u306a\u308a\u3059\u307e\u3057\u306e\u72b6\u6cc1\u306e\u628a\u63e1\u304c\u3067\u304d\u3001\u3088\u308a\u52b9\u679c\u7684\u306a\u306a\u308a\u3059\u307e\u3057\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308b\u3053\u3068\u304c\u6319\u3052\u3089\u308c\u308b\u3002\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u306f\u4eca\u5f8c\u3055\u3089\u306b\u91cd\u8981\u8996\u3055\u308c\u3066\u3044\u304f\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u308b\u3053\u3068\u304b\u3089\u3001DMARC\u306f\u4eca\u5f8c\u3055\u3089\u306b\u666e\u53ca\u3057\u3066\u3044\u304f\u3068\u8003\u3048\u3089\u308c\u308b\u3002<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      \u3010\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u3011
      \u5317\u5ddd \u76f4\u54c9\uff08\u304d\u305f\u304c\u308f \u306a\u304a\u3084\uff09\u6c0f
      \u6771\u4eac\u8fb2\u5de5\u5927\u5b66 \u5927\u5b66\u9662\u5de5\u5b66\u7814\u7a76\u9662\u3000\u52a9\u6559\u3002\u535a\u58eb\uff08\u60c5\u5831\u5de5\u5b66\uff09\u3002
      \u60c5\u5831\u51e6\u7406\u5b66\u4f1aIOT \u7814\u7a76\u4f1a\u85e4\u6751\u8a18\u5ff5\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u8cde\uff082017\/06\uff09\u3001IOTS2016 \u30b7\u30b9\u30b3\u30b7\u30b9\u30c6\u30e0\u30ba\u8cde\uff082016\/12\uff09\u3001ICT-ISPC2016 Best Paper  Award\uff082016\/05\uff09\u3001IOTS2015 \u512a\u79c0\u8ad6\u6587\u8cde\uff08 2015\/12\uff09\u7b49\u3092\u53d7\u8cde\u3002
      \u8ad6\u6587\u306b\u300cA Client Based DNSSEC Validation System with Adaptive Alert Mechanism Considering Minimal Client Timeout\u300d\uff08IEICE Transactions ; 2017 \u5e748 \u6708\uff09\u3001\u300cA spoofed E-mail CountermeasureMethod by Scoring the Reliability of DKIM Signature Using Communication Data\u300d\uff08Proc. of IEEE 41st Annual Computer Software and Applications\uff08COMPSAC 2017\uff09; 2017 \u5e747 \u6708\uff09\u3001\u300cDesign and Implementation of a DMARC Verification Result Notification System\u300d\uff08Proc. of the 13th APAN esearch Workshop ; 2016 \u5e748 \u6708\uff09\u306a\u3069\u591a\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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