{"id":3936,"date":"2026-07-27T18:59:19","date_gmt":"2026-07-27T09:59:19","guid":{"rendered":"https:\/\/debono.co.jp\/media\/?p=3936"},"modified":"2026-07-27T18:59:19","modified_gmt":"2026-07-27T09:59:19","slug":"soshin-domain-ninsho-ai","status":"publish","type":"post","link":"https:\/\/debono.co.jp\/media\/soshin-domain-ninsho-ai\/","title":{"rendered":"\u30102026\u5e74\u3011\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u8a2d\u5b9a\uff5c\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u3092\u9632\u3050"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u6708\u66dc\u306e\u671d\u3001\u914d\u4fe1\u30c4\u30fc\u30eb\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u958b\u304f\u3068\u3001\u5148\u9031\u9001\u3063\u305f\u30e1\u30fc\u30eb\u30de\u30ac\u30b8\u30f3\u306e\u5230\u9054\u7387\u304c\u524d\u306e\u6708\u3088\u308a\u5927\u304d\u304f\u843d\u3061\u3066\u3044\u308b\u3002\u30a8\u30e9\u30fc\u306e\u5185\u8a33\u3092\u8ffd\u3046\u3068\u3001\u5c4a\u304b\u306a\u304b\u3063\u305f\u5b9b\u5148\u306e\u591a\u304f\u304cGmail\u3068Yahoo!\u30e1\u30fc\u30eb\u3002\u6587\u9762\u3092\u5909\u3048\u305f\u308f\u3051\u3067\u3082\u30ea\u30b9\u30c8\u3092\u8cb7\u3044\u8db3\u3057\u305f\u308f\u3051\u3067\u3082\u306a\u3044\u306e\u306b\u3001\u306a\u305c\u304b\u5c4a\u304b\u306a\u3044\u2014\u2014\u30e1\u30fc\u30eb\u65bd\u7b56\u306e\u76f8\u8ac7\u3067\u3001\u3053\u3046\u3044\u3046\u75c7\u72b6\u306f\u73cd\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u3057\u3066\u6700\u521d\u306b\u78ba\u8a8d\u3059\u308b\u306e\u306f\u6587\u9762\u3067\u306f\u306a\u304f\u3001DNS\u3067\u3059\u3002Google\u306f2024\u5e742\u6708\u304b\u3089\u3001Gmail\u5b9b\u306b1\u65e55,000\u4ef6\u4ee5\u4e0a\u3092\u9001\u308b\u9001\u4fe1\u8005\u306b\u5bfe\u3057\u3066SPF\u3068DKIM\u306e\u4e21\u65b9\u3001\u305d\u3057\u3066DMARC\u306e\u8a2d\u5b9a\u3092\u6c42\u3081\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3064\u307e\u308a<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#fff3a3 60%)\">\u30e1\u30fc\u30eb\u304c\u5c4a\u304f\u304b\u3069\u3046\u304b\u306f\u3001\u9001\u308b\u524d\u306b\u30c9\u30e1\u30a4\u30f3\u5074\u306e\u8a2d\u5b9a\u3067\u6c7a\u307e\u3063\u3066\u3044\u308b\u90e8\u5206\u304c\u5927\u304d\u3044<\/span>\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001SPF\u30fbDKIM\u30fbDMARC\u305d\u308c\u305e\u308c\u306e\u5f79\u5272\u306e\u9055\u3044\u304b\u3089\u3001DNS\u30ec\u30b3\u30fc\u30c9\u306e\u5177\u4f53\u7684\u306a\u66f8\u304d\u65b9\u3001p=none\u304b\u3089reject\u3078\u306e\u6bb5\u968e\u79fb\u884c\u3001\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u306e\u8aad\u307f\u65b9\u3001MA\u30fb\u914d\u4fe1\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u5834\u5408\u306e\u8a2d\u5b9a\u3001\u305d\u3057\u3066\u73fe\u5834\u3067\u983b\u767a\u3059\u308b\u5931\u6557\u307e\u3067\u3092\u3001\u624b\u9806\u306b\u6cbf\u3063\u3066\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n<!-- \u25bc \u30ab\u30e1\u5148\u751f\uff06\u30ab\u30e1\u5b50 \u306f\u3058\u3081\u306b\u30c8\u30fc\u30af -->\n<div class=\"sb-intro-card\"><br \/>\n<div class=\"speech-bubble sb-left sb-sensei\"><div class=\"sb-character\"><span class=\"sb-avatar sb-avatar--full\"><img decoding=\"async\" src=\"http:\/\/debono.co.jp\/media\/wp-content\/uploads\/2026\/05\/kame-sensei-v4.png\" alt=\"\u30ab\u30e1\u5148\u751f\" loading=\"lazy\"><\/span><span class=\"sb-name\">\u30ab\u30e1\u5148\u751f<\/span><\/div><div class=\"sb-balloon\"><p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3068\u3044\u3046\u306e\u306f\u3001\u30e1\u30fc\u30eb\u306e\u5dee\u51fa\u4eba\u304c\u672c\u7269\u304b\u3069\u3046\u304b\u3092\u3001\u53d7\u4fe1\u5074\u304c\u6a5f\u68b0\u7684\u306b\u78ba\u304b\u3081\u3089\u308c\u308b\u3088\u3046\u306b\u3059\u308b\u4ed5\u7d44\u307f\u3060\u3088\u3002SPF\u30fbDKIM\u30fbDMARC\u306e3\u3064\u304c\u30bb\u30c3\u30c8\u3067\u50cd\u304f\u3093\u3060\u3002<\/p><\/div><\/div><br \/>\n<div class=\"speech-bubble sb-right sb-kameko\"><div class=\"sb-character\"><span class=\"sb-avatar sb-avatar--full\"><img decoding=\"async\" src=\"http:\/\/debono.co.jp\/media\/wp-content\/uploads\/2026\/05\/kame-ko-v3-up.png\" alt=\"\u30ab\u30e1\u5b50\" loading=\"lazy\"><\/span><span class=\"sb-name\">\u30ab\u30e1\u5b50<\/span><\/div><div class=\"sb-balloon\"><p>3\u3064\u3082\u3042\u308b\u3093\u3067\u3059\u306d\u3002\u3069\u308c\u304b1\u3064\u8a2d\u5b9a\u3057\u3066\u3042\u308c\u3070\u8db3\u308a\u308b\u3001\u3068\u3044\u3046\u3082\u306e\u3067\u306f\u306a\u3044\u3093\u3067\u3059\u304b\uff1f<\/p><\/div><\/div><br \/>\n<div class=\"speech-bubble sb-left sb-sensei\"><div class=\"sb-character\"><span class=\"sb-avatar sb-avatar--full\"><img decoding=\"async\" src=\"http:\/\/debono.co.jp\/media\/wp-content\/uploads\/2026\/05\/kame-sensei-v4.png\" alt=\"\u30ab\u30e1\u5148\u751f\" loading=\"lazy\"><\/span><span class=\"sb-name\">\u30ab\u30e1\u5148\u751f<\/span><\/div><div class=\"sb-balloon\"><p>\u5f79\u5272\u304c\u9055\u3046\u304b\u3089\u30011\u3064\u3067\u306f\u8db3\u308a\u306a\u3044\u3093\u3060\u3002SPF\u306f\u300c\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u3063\u3066\u3088\u3044\u304b\u300d\u3001DKIM\u306f\u300c\u9014\u4e2d\u3067\u66f8\u304d\u63db\u3048\u3089\u308c\u3066\u3044\u306a\u3044\u304b\u300d\u3001DMARC\u306f\u300c\u305d\u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3069\u3046\u6271\u3063\u3066\u307b\u3057\u3044\u304b\u300d\u3092\u5ba3\u8a00\u3059\u308b\u3002\u3057\u304b\u3082Gmail\u306f\u3001\u307e\u3068\u307e\u3063\u305f\u91cf\u3092\u9001\u308b\u76f8\u624b\u306b\u306f3\u3064\u5168\u90e8\u3092\u6c42\u3081\u3066\u3044\u308b\u3088\u3002<\/p><\/div><\/div><br \/>\n<div class=\"speech-bubble sb-right sb-kameko\"><div class=\"sb-character\"><span class=\"sb-avatar sb-avatar--full\"><img decoding=\"async\" src=\"http:\/\/debono.co.jp\/media\/wp-content\/uploads\/2026\/05\/kame-ko-v3-up.png\" alt=\"\u30ab\u30e1\u5b50\" loading=\"lazy\"><\/span><span class=\"sb-name\">\u30ab\u30e1\u5b50<\/span><\/div><div class=\"sb-balloon\"><p>\u5f79\u5272\u5206\u62c5\u306e\u3042\u308b3\u70b9\u30bb\u30c3\u30c8\u3001\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002\u305d\u308c\u305e\u308c\u304c\u4f55\u3092\u3057\u3066\u3044\u308b\u3068\u3053\u308d\u304b\u3089\u3001\u9806\u756a\u306b\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p><\/div><\/div><br \/>\n<\/div>\n\n<!-- \u25b2 \u30ab\u30e1\u5148\u751f\uff06\u30ab\u30e1\u5b50 \u306f\u3058\u3081\u306b\u30c8\u30fc\u30af -->\n\n<div class=\"swell-block-capbox cap_box is-style-onborder_ttl\"><div class=\"cap_box_ttl\"><span>\u3053\u306e\u8a18\u4e8b\u306e\u30dd\u30a4\u30f3\u30c8<\/span><\/div><div class=\"cap_box_content\">\n\n<ul class=\"is-style-check_list wp-block-list\"><li>SPF\u306f\u9001\u4fe1\u30b5\u30fc\u30d0\u30fc\u306e\u8a31\u53ef\u3001DKIM\u306f\u96fb\u5b50\u7f72\u540d\u3001DMARC\u306f\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u6271\u3044\u306e\u5ba3\u8a00\u3002\u5f79\u5272\u304c\u9055\u3046\u306e\u3067\u4e92\u3044\u306e\u4ee3\u308f\u308a\u306b\u306f\u306a\u3089\u306a\u3044<\/li><li>Gmail\u306f2024\u5e742\u6708\u304b\u3089\u30011\u65e55,000\u4ef6\u4ee5\u4e0a\u9001\u308b\u9001\u4fe1\u8005\u306bSPF\u3068DKIM\u306e\u4e21\u65b9\uff0bDMARC\u3001\u305d\u3057\u3066From\u30d8\u30c3\u30c0\u30fc\u3068\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u6c42\u3081\u3066\u3044\u308b<\/li><li>DMARC\u306fp=none\u3067\u30ec\u30dd\u30fc\u30c8\u3092\u96c6\u3081\u3066\u304b\u3089\u3001quarantine\u2192reject\u3078\u6bb5\u968e\u7684\u306b\u4e0a\u3052\u308b\u3002\u3044\u304d\u306a\u308areject\u306f\u81ea\u793e\u306e\u6b63\u898f\u30e1\u30fc\u30eb\u3092\u843d\u3068\u3059<\/li><\/ul>\n\n<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3068\u306f\uff1a\u30e1\u30fc\u30eb\u306e\u8eab\u5143\u3092\u8a3c\u660e\u3059\u308b3\u3064\u306e\u4ed5\u7d44\u307f<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30fc\u30eb\u9001\u4fe1\u306e\u57fa\u76e4\u3067\u3042\u308bSMTP\u3068\u3044\u3046\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u5dee\u51fa\u4eba\u306e\u6b04\u3092\u9001\u4fe1\u5074\u304c\u81ea\u7531\u306b\u66f8\u3051\u308b\u524d\u63d0\u3067\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u624b\u7d19\u306e\u5c01\u7b52\u306b\u597d\u304d\u306a\u5dee\u51fa\u4eba\u540d\u3092\u66f8\u3051\u308b\u306e\u3068\u540c\u3058\u3067\u3001\u6280\u8853\u7684\u306b\u306f\u8ab0\u3067\u3082\u4ed6\u793e\u3092\u540d\u4e57\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u306e\u69cb\u9020\u7684\u306a\u5f31\u70b9\u3092\u57cb\u3081\u308b\u305f\u3081\u306b\u5f8c\u304b\u3089\u8db3\u3055\u308c\u305f\u306e\u304c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3067\u3001<strong>DNS\u3068\u3044\u3046\u516c\u958b\u306e\u5834\u6240\u306b\u300c\u3053\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u3089\u308c\u308b\u30e1\u30fc\u30eb\u306f\u3053\u3046\u691c\u8a3c\u3057\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u5ba3\u8a00\u3057\u3066\u304a\u304f<\/strong>\u3068\u3044\u3046\u8003\u3048\u65b9\u306b\u7acb\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u88c5\u306e\u4e2d\u8eab\u306f\u3001\u307b\u307c\u3059\u3079\u3066DNS\u30ec\u30b3\u30fc\u30c9\u306e\u8ffd\u52a0\u3067\u3059\u3002SPF\u306f\u30c9\u30e1\u30a4\u30f3\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3001DKIM\u306f\u30bb\u30ec\u30af\u30bf\u4ed8\u304d\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3001DMARC\u306f<strong>_dmarc<\/strong>\u3067\u59cb\u307e\u308b\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u516c\u958b\u3057\u307e\u3059\u3002\u30e1\u30fc\u30eb\u672c\u6587\u306e\u66f8\u304d\u65b9\u3084\u914d\u4fe1\u30c4\u30fc\u30eb\u306e\u753b\u9762\u8a2d\u5b9a\u3067\u306f\u306a\u304f\u3001\u30c9\u30e1\u30a4\u30f3\u305d\u306e\u3082\u306e\u306e\u8a2d\u5b9a\u3067\u3042\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u4f5c\u696d\u306f\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u62c5\u5f53\u3060\u3051\u3067\u306f\u5b8c\u7d50\u305b\u305a\u3001<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#fff3a3 60%)\">DNS\u3092\u7ba1\u7406\u3057\u3066\u3044\u308b\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u90e8\u9580\u3084\u5236\u4f5c\u4f1a\u793e\u3068\u306e\u5171\u540c\u4f5c\u696d\u306b\u306a\u308b<\/span>\u306e\u304c\u666e\u901a\u3067\u3059\u3002\u7740\u624b\u6642\u70b9\u3067\u3001\u8ab0\u304cDNS\u30ec\u30b3\u30fc\u30c9\u3092\u89e6\u308c\u308b\u306e\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304f\u3068\u6bb5\u53d6\u308a\u304c\u5d29\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u306a\u304a\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u306f\u8a8d\u8a3c\u3060\u3051\u3067\u6c7a\u307e\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u958b\u5c01\u3084\u8fd4\u4fe1\u3068\u3044\u3063\u305f\u53d7\u4fe1\u8005\u306e\u53cd\u5fdc\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u5831\u544a\u306e\u5272\u5408\u3001\u914d\u4fe1\u505c\u6b62\u306e\u6271\u3044\u3001\u30ea\u30b9\u30c8\u306e\u9bae\u5ea6\u306a\u3069\u3082\u7dcf\u5408\u7684\u306b\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001<strong>\u8a8d\u8a3c\u304c\u6b20\u3051\u3066\u3044\u308b\u3068\u4ed6\u306e\u8981\u7d20\u304c\u826f\u597d\u3067\u3082\u8db3\u5207\u308a\u3055\u308c\u308b<\/strong>\u3068\u3044\u3046\u9806\u5e8f\u304c\u3042\u308a\u307e\u3059\u3002\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u52a0\u70b9\u9805\u76ee\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u4ed6\u306e\u52aa\u529b\u3092\u6210\u7acb\u3055\u305b\u308b\u305f\u3081\u306e\u571f\u53f0\u3060\u3068\u6349\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">SPF\uff1a\u9001\u4fe1\u3092\u8a31\u53ef\u3057\u305f\u30b5\u30fc\u30d0\u30fc\u3092DNS\u3067\u5ba3\u8a00\u3059\u308b<\/h2>\n\n\n<p class=\"wp-block-paragraph\">SPF\uff08Sender Policy Framework\uff09\u306f\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u3088\u3044\u9001\u4fe1\u5143\u3092\u3001DNS\u306eTXT\u30ec\u30b3\u30fc\u30c9\u306b\u5217\u6319\u3057\u3066\u304a\u304f\u4ed5\u7d44\u307f\u3067\u3059\u3002\u53d7\u4fe1\u5074\u306e\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30e1\u30fc\u30eb\u3092\u53d7\u3051\u53d6\u3063\u305f\u6642\u70b9\u3067<strong>\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\uff08Return-Path\uff09<\/strong>\u306e\u30c9\u30e1\u30a4\u30f3\u306eSPF\u30ec\u30b3\u30fc\u30c9\u3092\u5f15\u304d\u3001\u5b9f\u969b\u306b\u63a5\u7d9a\u3057\u3066\u304d\u305fIP\u30a2\u30c9\u30ec\u30b9\u304c\u305d\u3053\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u7167\u5408\u3057\u307e\u3059\u3002\u542b\u307e\u308c\u3066\u3044\u308c\u3070pass\u3001\u542b\u307e\u308c\u3066\u3044\u306a\u3051\u308c\u3070fail\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u8a18\u8ff0\u306fv=spf1\u3067\u59cb\u307e\u308a\u3001include\u30fbip4\u30fbip6\u30fba\u30fbmx\u3068\u3044\u3063\u305f\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u7a7a\u767d\u533a\u5207\u308a\u3067\u4e26\u3079\u3001\u6700\u5f8c\u306b\u8a72\u5f53\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u6271\u3044\u3092\u793a\u3059\u4fee\u98fe\u5b50\u3092\u7f6e\u304d\u307e\u3059\u3002\u81ea\u793e\u30e1\u30fc\u30eb\u3092Google Workspace\u3067\u904b\u7528\u3057\u3001\u914d\u4fe1\u30c4\u30fc\u30eb\u30921\u3064\u4f75\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u5f62\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>example.com.  IN  TXT  \"v=spf1 include:_spf.google.com include:spf.haishin-tool.example ~all\"<\/code><\/pre>\n\n\n<p class=\"wp-block-paragraph\">\u672b\u5c3e\u306e~all\u306fsoftfail\uff08\u8a72\u5f53\u3057\u306a\u3044\u9001\u4fe1\u5143\u306f\u7591\u308f\u3057\u3044\u304c\u62d2\u5426\u307e\u3067\u306f\u3057\u306a\u3044\uff09\u3001-all\u306fhardfail\uff08\u8a72\u5f53\u3057\u306a\u3044\u9001\u4fe1\u5143\u306f\u62d2\u5426\u3057\u3066\u3088\u3044\uff09\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u904b\u7528\u306e\u521d\u671f\u306f~all\u3067\u69d8\u5b50\u3092\u898b\u3066\u3001\u9001\u4fe1\u5143\u306e\u68da\u5378\u3057\u304c\u7d42\u308f\u3063\u3066\u304b\u3089-all\u306b\u5bc4\u305b\u308b\u306e\u304c\u5b89\u5168\u3067\u3059\u3002\u307e\u305fSPF\u306b\u306f\u3001\u5f8c\u8ff0\u3059\u308b\u3068\u304a\u308a<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#fff3a3 60%)\">1\u30c9\u30e1\u30a4\u30f3\u306b\u30ec\u30b3\u30fc\u30c9\u306f1\u3064\u3060\u3051\u30fbDNS\u53c2\u7167\u306f10\u56de\u307e\u3067<\/span>\u3068\u3044\u3046\u53b3\u3057\u3044\u5236\u7d04\u304c\u3042\u308a\u3001\u3053\u3053\u3092\u8e0f\u307f\u5916\u3059\u3068\u8a8d\u8a3c\u305d\u306e\u3082\u306e\u304c\u6210\u7acb\u3057\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u52a0\u3048\u3066SPF\u306f\u30e1\u30fc\u30eb\u304c\u8ee2\u9001\u3055\u308c\u308b\u3068\u7d4c\u8def\u304c\u5909\u308f\u3063\u3066\u5931\u6557\u3057\u3084\u3059\u3044\u3068\u3044\u3046\u5f31\u70b9\u3082\u6301\u3063\u3066\u304a\u308a\u3001\u3053\u308c\u3092\u88dc\u3046\u306e\u304c\u6b21\u306eDKIM\u3067\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">DKIM\uff1a\u96fb\u5b50\u7f72\u540d\u3067\u6539\u3056\u3093\u3068\u306a\u308a\u3059\u307e\u3057\u3092\u898b\u629c\u304f<\/h2>\n\n\n<p class=\"wp-block-paragraph\">DKIM\uff08DomainKeys Identified Mail\uff09\u306f\u3001\u9001\u4fe1\u5074\u304c\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3068\u672c\u6587\u306b\u5bfe\u3057\u3066\u79d8\u5bc6\u9375\u3067\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u3051\u3001\u5bfe\u5fdc\u3059\u308b\u516c\u958b\u9375\u3092DNS\u306b\u516c\u958b\u3057\u3066\u304a\u304f\u4ed5\u7d44\u307f\u3067\u3059\u3002\u53d7\u4fe1\u5074\u306f\u7f72\u540d\u306b\u66f8\u304b\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u3068\u30bb\u30ec\u30af\u30bf\u304b\u3089\u516c\u958b\u9375\u3092\u53d6\u5f97\u3057\u3001\u7f72\u540d\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002\u691c\u8a3c\u304c\u901a\u308c\u3070\u3001<strong>\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u7ba1\u7406\u8005\u304c\u78ba\u304b\u306b\u9001\u3063\u305f\u3082\u306e\u3067\u3001\u9014\u4e2d\u3067\u66f8\u304d\u63db\u3048\u3089\u308c\u3066\u3044\u306a\u3044<\/strong>\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u516c\u958b\u9375\u306f\u300c\u30bb\u30ec\u30af\u30bf._domainkey.\u30c9\u30e1\u30a4\u30f3\u540d\u300d\u3068\u3044\u3046\u4f4d\u7f6e\u306bTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u7f6e\u304d\u307e\u3059\u3002\u30bb\u30ec\u30af\u30bf\u306f\u9001\u4fe1\u5143\u3054\u3068\u306b\u5225\u306e\u540d\u524d\u3092\u4ed8\u3051\u3089\u308c\u308b\u305f\u3081\u3001\u81ea\u793e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3068MA\u30c4\u30fc\u30eb\u3068\u914d\u4fe1\u30c4\u30fc\u30eb\u304c\u305d\u308c\u305e\u308c\u72ec\u7acb\u306bDKIM\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30ec\u30b3\u30fc\u30c9\u306e\u5f62\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>selector1._domainkey.example.com.  IN  TXT  \"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC...\"<\/code><\/pre>\n\n\n<p class=\"wp-block-paragraph\">\u9375\u306e\u9577\u3055\u306b\u3064\u3044\u3066\u3001Gmail\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306f<strong>1,024\u30d3\u30c3\u30c8\u4ee5\u4e0a\u306eDKIM\u9375\u304c\u5fc5\u8981<\/strong>\u3068\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u7406\u7531\u304b\u30892,048\u30d3\u30c3\u30c8\u306e\u9375\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002\u914d\u4fe1\u30c4\u30fc\u30eb\u5074\u3067\u9375\u3092\u751f\u6210\u3059\u308b\u5834\u5408\u306f\u3001\u65e2\u5b9a\u5024\u304c1,024\u30d3\u30c3\u30c8\u306b\u306a\u3063\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304f\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002SPF\u304c\u300c\u3069\u306e\u7d4c\u8def\u304b\u3089\u6765\u305f\u304b\u300d\u3092\u898b\u308b\u4ed5\u7d44\u307f\u306a\u306e\u306b\u5bfe\u3057\u3001DKIM\u306f\u300c\u4e2d\u8eab\u304c\u8ab0\u306e\u3082\u306e\u304b\u300d\u3092\u898b\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3053\u306e\u9055\u3044\u304c\u3042\u308b\u305f\u3081\u3001<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#cfe9ff 60%)\">\u8ee2\u9001\u3055\u308c\u305f\u7d50\u679cSPF\u304c\u5931\u6557\u3057\u3066\u3082\u3001DKIM\u304c\u751f\u304d\u6b8b\u3063\u3066\u3044\u308c\u3070DMARC\u306f\u901a\u308b<\/span>\u3068\u3044\u3046\u95a2\u4fc2\u304c\u6210\u7acb\u3057\u307e\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">DMARC\uff1a\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u6271\u3044\u3092\u5ba3\u8a00\u3059\u308b<\/h2>\n\n\n<p class=\"wp-block-paragraph\">SPF\u3068DKIM\u306f\u691c\u8a3c\u306e\u65b9\u6cd5\u3092\u63d0\u4f9b\u3059\u308b\u3060\u3051\u3067\u3001\u691c\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3069\u3046\u6271\u3046\u304b\u306f\u53d7\u4fe1\u5074\u306e\u5224\u65ad\u306b\u59d4\u306d\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u3002DMARC\uff08Domain-based Message Authentication, Reporting and Conformance\uff09\u306f\u3001\u305d\u306e\u6271\u3044\u3092<strong>\u5dee\u51fa\u4eba\u5074\u304b\u3089\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u4ed5\u7d44\u307f<\/strong>\u3067\u3059\u3002\u52a0\u3048\u3066\u3001\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u308b\u30e1\u30fc\u30eb\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u96c6\u8a08\u3057\u305f\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308c\u308b\u3068\u3044\u3046\u3001\u904b\u7528\u4e0a\u304d\u308f\u3081\u3066\u91cd\u8981\u306a\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u30ec\u30b3\u30fc\u30c9\u306f<strong>_dmarc.\u30c9\u30e1\u30a4\u30f3\u540d<\/strong>\u306bTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u516c\u958b\u3057\u307e\u3059\u3002\u6700\u5c0f\u69cb\u6210\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>_dmarc.example.com.  IN  TXT  \"v=DMARC1; p=none; rua=mailto:dmarc-report@example.com\"<\/code><\/pre>\n\n\n<p class=\"wp-block-paragraph\"><strong>p<\/strong>\u304c\u6271\u3044\u3092\u793a\u3059\u30dd\u30ea\u30b7\u30fc\u3067\u3001\u5024\u306f3\u7a2e\u985e\u3067\u3059\u3002none\u306f\u4f55\u3082\u305b\u305a\u901a\u5e38\u914d\u4fe1\u3057\u7d50\u679c\u3060\u3051\u5831\u544a\u3055\u305b\u308b\u76e3\u8996\u30e2\u30fc\u30c9\u3001quarantine\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306a\u3069\u306b\u9694\u96e2\u3001reject\u306f\u53d7\u4fe1\u5074\u30b5\u30fc\u30d0\u30fc\u304cSMTP\u306e\u3084\u308a\u53d6\u308a\u306e\u4e2d\u3067\u53d7\u3051\u53d6\u308a\u81ea\u4f53\u3092\u62d2\u5426\u3057\u307e\u3059\u3002\u5c0e\u5165\u76f4\u5f8c\u306breject\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u8a2d\u5b9a\u6f0f\u308c\u306e\u3042\u308b\u6b63\u898f\u30e1\u30fc\u30eb\u307e\u3067\u6d88\u3048\u3066\u3057\u307e\u3046\u305f\u3081\u3001<strong>\u307e\u305anone\u3067\u5b9f\u614b\u3092\u628a\u63e1\u3059\u308b<\/strong>\u306e\u304c\u5b9a\u77f3\u3067\u3059\u3002\u305d\u3057\u3066DMARC\u306e\u5224\u5b9a\u306f\u3001SPF\u3084DKIM\u304c\u5358\u306bpass\u3057\u305f\u3060\u3051\u3067\u306f\u901a\u308a\u307e\u305b\u3093\u3002\u6b21\u306b\u8aac\u660e\u3059\u308b\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3068\u3044\u3046\u6761\u4ef6\u304c\u7d61\u307f\u307e\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff1aSPF\u304c\u901a\u3063\u3066\u3082DMARC\u304c\u843d\u3061\u308b\u4ed5\u7d44\u307f<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff08identifier alignment\uff09\u3068\u306f\u3001\u53d7\u4fe1\u8005\u306e\u753b\u9762\u306b\u8868\u793a\u3055\u308c\u308b<strong>\u30d8\u30c3\u30c0\u30fcFrom\u306e\u30c9\u30e1\u30a4\u30f3<\/strong>\u3068\u3001SPF\u3067\u691c\u8a3c\u3055\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u3001\u307e\u305f\u306fDKIM\u7f72\u540d\u306ed=\u306b\u66f8\u304b\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u3068\u3044\u3046\u6761\u4ef6\u3067\u3059\u3002Gmail\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3082\u300c\u9001\u4fe1\u8005\u306eFrom:\u30d8\u30c3\u30c0\u30fc\u5185\u306e\u30c9\u30e1\u30a4\u30f3\u306f\u3001SPF\u30c9\u30e1\u30a4\u30f3\u307e\u305f\u306fDKIM\u30c9\u30e1\u30a4\u30f3\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u300d\u3068\u660e\u8a18\u3057\u3066\u3044\u307e\u3059\u3002\u3069\u3061\u3089\u304b\u4e00\u65b9\u3067\u3082\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u4ed8\u304d\u3067pass\u3057\u3066\u3044\u308c\u3070DMARC\u306f\u901a\u308a\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u52d9\u3067\u3064\u307e\u305a\u304f\u306e\u306f\u3053\u3053\u3067\u3059\u3002\u914d\u4fe1\u30c4\u30fc\u30eb\u3092\u65e2\u5b9a\u8a2d\u5b9a\u306e\u307e\u307e\u4f7f\u3046\u3068\u3001\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\u304c\u30c4\u30fc\u30eb\u5074\u306e\u5171\u6709\u30c9\u30e1\u30a4\u30f3\u306b\u306a\u308a\u3001\u30d8\u30c3\u30c0\u30fcFrom\u3060\u3051\u304c\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3068\u3044\u3046\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#fff3a3 60%)\">\u30c4\u30fc\u30eb\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u3057\u3066\u306fSPF\u304cpass\u3059\u308b\u306e\u306b\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3068\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u6210\u7acb\u305b\u305aDMARC\u306ffail\u3059\u308b<\/span>\u3068\u3044\u3046\u3001\u4e00\u898b\u77db\u76fe\u3057\u305f\u7d50\u679c\u304c\u51fa\u307e\u3059\u3002\u300cSPF\u306f\u8a2d\u5b9a\u6e08\u307f\u306a\u306e\u306b\u5c4a\u304b\u306a\u3044\u300d\u3068\u3044\u3046\u76f8\u8ac7\u306e\u591a\u304f\u306f\u3001\u3053\u306e\u5f62\u3067\u3059\u3002\u89e3\u6c7a\u7b56\u306f\u3001\u30c4\u30fc\u30eb\u5074\u3067\u81ea\u793e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u30d0\u30a6\u30f3\u30b9\u7528\u30c9\u30e1\u30a4\u30f3\u3068\u3057\u3066\u767b\u9332\u3057\u3001\u3042\u308f\u305b\u3066\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3067DKIM\u7f72\u540d\u3055\u305b\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306b\u306f2\u3064\u306e\u30e2\u30fc\u30c9\u304c\u3042\u308a\u307e\u3059\u3002\u65e2\u5b9a\u306e<strong>relaxed\uff08r\uff09<\/strong>\u306f\u7d44\u7e54\u30c9\u30e1\u30a4\u30f3\u304c\u4e00\u81f4\u3057\u3066\u3044\u308c\u3070\u3088\u304f\u3001news.example.com\u3068example.com\u306f\u4e00\u81f4\u6271\u3044\u306b\u306a\u308a\u307e\u3059\u3002<strong>strict\uff08s\uff09<\/strong>\u306f\u5b8c\u5168\u4e00\u81f4\u3092\u8981\u6c42\u3057\u307e\u3059\u3002aspf=s\u3084adkim=s\u3067\u53b3\u683c\u5316\u3067\u304d\u307e\u3059\u304c\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067\u914d\u4fe1\u3057\u3066\u3044\u308b\u69cb\u6210\u3067\u306f\u6b63\u898f\u30e1\u30fc\u30eb\u304c\u843d\u3061\u3084\u3059\u304f\u306a\u308b\u305f\u3081\u3001\u901a\u5e38\u306frelaxed\u306e\u307e\u307e\u904b\u7528\u3057\u3001\u5fc5\u8981\u304c\u751f\u3058\u3066\u304b\u3089\u691c\u8a0e\u3059\u308b\u9806\u5e8f\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">Gmail\u3068Yahoo\u306e\u9001\u4fe1\u8005\u8981\u4ef6\uff1a2024\u5e742\u6708\u304b\u3089\u306e\u5fc5\u9808\u4e8b\u9805<\/h2>\n\n\n<p class=\"wp-block-paragraph\">2024\u5e742\u67081\u65e5\u304b\u3089\u3001Gmail\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306f\u8981\u4ef6\u3092\u660e\u78ba\u306b\u7dda\u5f15\u304d\u3057\u307e\u3057\u305f\u3002\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005\u306b\u5bfe\u3057\u3066\u306f\u3001\u9001\u4fe1\u5143\u30c9\u30e1\u30a4\u30f3\u3078\u306e<strong>SPF\u307e\u305f\u306fDKIM<\/strong>\u306e\u8a2d\u5b9a\u3001\u9001\u4fe1\u5143\u306e\u30c9\u30e1\u30a4\u30f3\u307e\u305f\u306fIP\u306b\u6709\u52b9\u306a\u6b63\u5f15\u304d\u304a\u3088\u3073\u9006\u5f15\u304d\uff08PTR\uff09\u306eDNS\u30ec\u30b3\u30fc\u30c9\u304c\u3042\u308b\u3053\u3068\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u306bTLS\u63a5\u7d9a\u3092\u4f7f\u3046\u3053\u3068\uff08\u3053\u306e\u9805\u76ee\u306f2023\u5e7412\u6708\u306b\u8ffd\u52a0\uff09\u3001RFC 5322\u306b\u6e96\u62e0\u3057\u305f\u5f62\u5f0f\u3001Gmail\u306eFrom:\u30d8\u30c3\u30c0\u30fc\u306e\u306a\u308a\u3059\u307e\u3057\u3092\u3057\u306a\u3044\u3053\u3068\u3001\u305d\u3057\u3066\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u30920.3%\u672a\u6e80\u306b\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u3001Gmail\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u5b9b\u306b<strong>1\u65e5\u3042\u305f\u308a5,000\u4ef6\u4ee5\u4e0a<\/strong>\u3092\u9001\u308b\u9001\u4fe1\u8005\u306b\u306f\u8ffd\u52a0\u306e\u8981\u4ef6\u304c\u8ab2\u3055\u308c\u307e\u3059\u3002SPF\u3068DKIM\u306e\u4e21\u65b9\u306e\u8a2d\u5b9a\u3001DMARC\u306e\u8a2d\u5b9a\u3001From\u30d8\u30c3\u30c0\u30fc\u3068SPF\uff0fDKIM\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3001\u305d\u3057\u3066\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u3067\u767b\u9332\u89e3\u9664\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u5f8c\u8005\u306f<strong>List-Unsubscribe\u3068List-Unsubscribe-Post\u306e\u4e21\u30d8\u30c3\u30c0\u30fc<\/strong>\u3092\u5b9f\u88c5\u3057\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u672c\u6587\u306b\u3082\u89e3\u9664\u30ea\u30f3\u30af\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u8981\u4ef6\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002DMARC\u306e\u30dd\u30ea\u30b7\u30fc\u306fp=none\u3067\u3082\u8981\u4ef6\u3092\u6e80\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>\u9805\u76ee<\/th><th>\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005<\/th><th>1\u65e55,000\u4ef6\u4ee5\u4e0a\u306e\u9001\u4fe1\u8005<\/th><\/tr><\/thead><tbody><tr><td>\u8a8d\u8a3c<\/td><td>SPF\u307e\u305f\u306fDKIM\u306e\u3044\u305a\u308c\u304b<\/td><td>SPF\u3068DKIM\u306e\u4e21\u65b9\uff0bDMARC\uff08p=none\u3067\u3082\u53ef\uff09<\/td><\/tr><tr><td>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8<\/td><td>\u660e\u793a\u306e\u8981\u4ef6\u306a\u3057<\/td><td>From\u30d8\u30c3\u30c0\u30fc\u304cSPF\u307e\u305f\u306fDKIM\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u4e00\u81f4<\/td><\/tr><tr><td>\u767b\u9332\u89e3\u9664<\/td><td>\u672c\u6587\u306b\u89e3\u9664\u624b\u6bb5<\/td><td>\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u89e3\u9664\uff08List-Unsubscribe\u7cfb\u30d8\u30c3\u30c0\u30fc\uff09\uff0b\u672c\u6587\u30ea\u30f3\u30af<\/td><\/tr><tr><td>\u89e3\u9664\u306e\u51e6\u7406<\/td><td>\u901f\u3084\u304b\u306b<\/td><td>2\u65e5\u4ee5\u5185\u306b\u51e6\u7406<\/td><\/tr><tr><td>\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387<\/td><td>0.3%\u672a\u6e80<\/td><td>0.10%\u672a\u6e80\u3092\u76ee\u6a19\u30fb0.30%\u4ee5\u4e0a\u306b\u3057\u306a\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p class=\"wp-block-paragraph\">Yahoo\uff08\u7c73\u56fd\u306eYahoo Inc.\uff09\u3082\u540c\u3058\u6642\u671f\u306b\u8db3\u4e26\u307f\u3092\u305d\u308d\u3048\u3001\u516c\u5f0f\u306e\u9001\u4fe1\u8005\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u300c2024\u5e742\u6708\u304b\u3089\u6b21\u306e\u9001\u4fe1\u57fa\u6e96\u306e\u9069\u7528\u304c\u59cb\u307e\u308b\u300d\u3068\u544a\u77e5\u3057\u3001\u4e0a\u534a\u671f\u306b\u304b\u3051\u3066\u6bb5\u968e\u7684\u306b\u9069\u7528\u3057\u3066\u3044\u304f\u3068\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u5185\u5bb9\u306f\u307b\u307c\u5171\u901a\u3067\u3001\u4e00\u62ec\u9001\u4fe1\u8005\u306b\u306fSPF\u3068DKIM\u306e\u4e21\u65b9\u3001\u5c11\u306a\u304f\u3068\u3082p=none\u306e\u6709\u52b9\u306aDMARC\u30dd\u30ea\u30b7\u30fc\u3001\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u767b\u9332\u89e3\u9664\u306e\u5b9f\u88c5\u3001\u305d\u3057\u3066\u89e3\u9664\u8981\u6c42\u30922\u65e5\u4ee5\u5185\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u3092\u6c42\u3081\u3066\u3044\u307e\u3059\u3002\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u306e\u57fa\u6e96\u306f0.3%\u672a\u6e80\u3067\u3059\u3002<\/p>\n\n\n<ul class=\"is-style-note_list wp-block-list\"><li>5,000\u4ef6\u306e\u5224\u5b9a\u306fGmail\u30a2\u30ab\u30a6\u30f3\u30c8\u5b9b\u306e1\u65e5\u306e\u901a\u6570\u3002\u7b2c\u4e09\u8005\u306e\u89e3\u8aac\u3067\u306f\u3001\u4e00\u5ea6\u3053\u306e\u898f\u6a21\u306b\u9054\u3057\u305f\u9001\u4fe1\u8005\u306f\u4ee5\u5f8c\u3082\u4e00\u62ec\u9001\u4fe1\u8005\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u308b<\/li><li>\u3053\u3053\u3067\u6319\u3052\u305fYahoo\u306fYahoo! JAPAN\uff08LINE\u30e4\u30d5\u30fc\uff09\u3068\u306f\u5225\u306e\u4e8b\u696d\u8005\u3002\u56fd\u5185\u5411\u3051\u306e\u8981\u4ef6\u306f\u5404\u793e\u306e\u516c\u5f0f\u60c5\u5831\u3067\u500b\u5225\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068<\/li><li>\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u306fGoogle Postmaster Tools\u3067\u78ba\u8a8d\u3059\u308b\u3002\u6570\u5024\u304c\u8df3\u306d\u308b\u65e5\u304c\u3042\u3063\u3066\u3082\u30010.30%\u3092\u7d99\u7d9a\u3057\u3066\u8d85\u3048\u306a\u3044\u904b\u7528\u3092\u76ee\u6a19\u306b\u3059\u308b<\/li><\/ul>\n\n\n<h2 class=\"wp-block-heading\">\u8a2d\u5b9a\u306e\u624b\u9806\uff1a\u8a3a\u65ad\u304b\u3089reject\u307e\u3067\u306e5\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304b\u3089\u306f\u5b9f\u969b\u306e\u4f5c\u696d\u624b\u9806\u3067\u3059\u3002\u9806\u756a\u3092\u5165\u308c\u66ff\u3048\u308b\u3068\u4e8b\u6545\u306b\u3064\u306a\u304c\u308b\u305f\u3081\u3001\u3053\u306e\u4e26\u3073\u306e\u307e\u307e\u9032\u3081\u3066\u304f\u3060\u3055\u3044\u3002\u7279\u306b\u3001DMARC\u306e\u30dd\u30ea\u30b7\u30fc\u5f37\u5316\u306f\u5fc5\u305a\u6700\u5f8c\u3067\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-step is-style-default\" data-num-style=\"circle\">\n\n<div class=\"swell-block-step__item\"><div class=\"swell-block-step__head\"><div class=\"swell-block-step__number\"><span class=\"__label\">STEP<\/span><span class=\"__num\">1<\/span><\/div><div class=\"swell-block-step__title\">\u9001\u4fe1\u5143\u3092\u68da\u5378\u3057\u3057\u3066\u73fe\u72b6\u3092\u8a3a\u65ad\u3059\u308b<\/div><\/div><div class=\"swell-block-step__body\">\n\n<p class=\"wp-block-paragraph\">\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u3044\u308b\u7d4c\u8def\u3092\u3059\u3079\u3066\u6d17\u3044\u51fa\u3057\u307e\u3059\u3002\u81ea\u793e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3001Google Workspace\u3084Microsoft 365\u3001MA\u30c4\u30fc\u30eb\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u30c4\u30fc\u30eb\u3001\u30d5\u30a9\u30fc\u30e0\u30c4\u30fc\u30eb\u3001\u8acb\u6c42\u30fb\u53d7\u767a\u6ce8\u30b7\u30b9\u30c6\u30e0\u3001CRM\u304b\u3089\u306e\u81ea\u52d5\u901a\u77e5\u306a\u3069\u304c\u5019\u88dc\u3067\u3059\u3002\u3042\u308f\u305b\u3066\u73fe\u5728\u306eSPF\u30fbDKIM\u30fbDMARC\u306e\u6709\u7121\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n<\/div><\/div>\n\n\n<div class=\"swell-block-step__item\"><div class=\"swell-block-step__head\"><div class=\"swell-block-step__number\"><span class=\"__label\">STEP<\/span><span class=\"__num\">2<\/span><\/div><div class=\"swell-block-step__title\">SPF\u30ec\u30b3\u30fc\u30c9\u3092\u6574\u3048\u308b<\/div><\/div><div class=\"swell-block-step__body\">\n\n<p class=\"wp-block-paragraph\">\u68da\u5378\u3057\u3057\u305f\u9001\u4fe1\u5143\u3092include\u3067\u4e26\u3079\u30011\u30c9\u30e1\u30a4\u30f3\u306b1\u30ec\u30b3\u30fc\u30c9\u3078\u7d71\u5408\u3057\u307e\u3059\u3002DNS\u53c2\u7167\u56de\u6570\u304c10\u56de\u3092\u8d85\u3048\u3066\u3044\u306a\u3044\u304b\u3092\u691c\u8a3c\u30c4\u30fc\u30eb\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n<\/div><\/div>\n\n\n<div class=\"swell-block-step__item\"><div class=\"swell-block-step__head\"><div class=\"swell-block-step__number\"><span class=\"__label\">STEP<\/span><span class=\"__num\">3<\/span><\/div><div class=\"swell-block-step__title\">\u9001\u4fe1\u5143\u3054\u3068\u306bDKIM\u3092\u6709\u52b9\u5316\u3059\u308b<\/div><\/div><div class=\"swell-block-step__body\">\n\n<p class=\"wp-block-paragraph\">\u5404\u30b5\u30fc\u30d3\u30b9\u306e\u7ba1\u7406\u753b\u9762\u3067DKIM\u9375\u3092\u751f\u6210\u3057\u3001\u6307\u5b9a\u3055\u308c\u305f\u30bb\u30ec\u30af\u30bf\u3068TXT\u5024\u3092DNS\u306b\u8ffd\u52a0\u3057\u3066\u304b\u3089\u3001\u7ba1\u7406\u753b\u9762\u5074\u3067\u8a8d\u8a3c\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002\u9375\u9577\u306f2,048\u30d3\u30c3\u30c8\u3092\u9078\u3079\u308b\u306a\u3089\u9078\u3073\u307e\u3059\u3002<\/p>\n\n<\/div><\/div>\n\n\n<div class=\"swell-block-step__item\"><div class=\"swell-block-step__head\"><div class=\"swell-block-step__number\"><span class=\"__label\">STEP<\/span><span class=\"__num\">4<\/span><\/div><div class=\"swell-block-step__title\">DMARC\u3092p=none\u3067\u516c\u958b\u3057\u3066\u30ec\u30dd\u30fc\u30c8\u3092\u96c6\u3081\u308b<\/div><\/div><div class=\"swell-block-step__body\">\n\n<p class=\"wp-block-paragraph\">_dmarc\u306bp=none\u3068rua\u3092\u8a2d\u5b9a\u3057\u30012\u301c4\u9031\u9593\u304b\u3051\u3066\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u3092\u84c4\u7a4d\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u6f0f\u308c\u3066\u3044\u305f\u9001\u4fe1\u5143\u3084\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u308b\u6b63\u898f\u7d4c\u8def\u304c\u898b\u3048\u3066\u304d\u307e\u3059\u3002<\/p>\n\n<\/div><\/div>\n\n\n<div class=\"swell-block-step__item\"><div class=\"swell-block-step__head\"><div class=\"swell-block-step__number\"><span class=\"__label\">STEP<\/span><span class=\"__num\">5<\/span><\/div><div class=\"swell-block-step__title\">quarantine\u2192reject\u3078\u6bb5\u968e\u7684\u306b\u4e0a\u3052\u308b<\/div><\/div><div class=\"swell-block-step__body\">\n\n<p class=\"wp-block-paragraph\">\u30ec\u30dd\u30fc\u30c8\u4e0a\u3067\u6b63\u898f\u7d4c\u8def\u304c\u3059\u3079\u3066\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u4ed8\u304d\u3067pass\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3089\u3001pct\u3092\u4f7f\u3063\u3066\u90e8\u5206\u9069\u7528\u304b\u3089\u59cb\u3081\u3001quarantine\u3001\u6700\u7d42\u7684\u306breject\u3078\u79fb\u884c\u3057\u307e\u3059\u3002<\/p>\n\n<\/div><\/div>\n\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e5\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u65e9\u3051\u308c\u30701\u304b\u6708\u534a\u3001\u4e01\u5be7\u306b\u9032\u3081\u308b\u306a\u30893\u304b\u6708\u7a0b\u5ea6\u3092\u898b\u8fbc\u3080\u5de5\u7a0b\u3067\u3059\u3002<strong>\u671f\u9593\u306e\u5927\u534a\u306f\u30b9\u30c6\u30c3\u30d74\u306e\u30ec\u30dd\u30fc\u30c8\u53ce\u96c6\u306b\u8cbb\u3084\u3055\u308c\u307e\u3059<\/strong>\u3002\u3053\u3053\u3092\u77ed\u7e2e\u3057\u305f\u3044\u6c17\u6301\u3061\u304c\u3001\u305d\u306e\u307e\u307ereject\u3067\u306e\u4e8b\u6545\u306b\u3064\u306a\u304c\u308b\u305f\u3081\u3001\u5f85\u3064\u3053\u3068\u81ea\u4f53\u304c\u4f5c\u696d\u3060\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">SPF\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u3068\u76f4\u3057\u65b9<\/h2>\n\n\n<p class=\"wp-block-paragraph\">SPF\u306e\u8a2d\u5b9a\u4f5c\u696d\u306f\u3001\u5b9f\u8cea\u7684\u306b\u9001\u4fe1\u5143\u306e\u68da\u5378\u3057\u4f5c\u696d\u3067\u3059\u3002\u68da\u5378\u3057\u306e\u7cbe\u5ea6\u304c\u305d\u306e\u307e\u307e\u30ec\u30b3\u30fc\u30c9\u306e\u6b63\u3057\u3055\u306b\u306a\u308a\u307e\u3059\u3002\u5404\u30b5\u30fc\u30d3\u30b9\u306e\u30d8\u30eb\u30d7\u30da\u30fc\u30b8\u306b\u306f\u300cSPF\u306b\u3053\u308c\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u3044\u3046include\u6587\u5b57\u5217\u304c\u5fc5\u305a\u6848\u5185\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u308c\u3092\u96c6\u3081\u30661\u884c\u306b\u307e\u3068\u3081\u307e\u3059\u3002\u9006\u306b\u8a00\u3048\u3070\u3001<strong>\u30d8\u30eb\u30d7\u306b\u66f8\u304b\u308c\u3066\u3044\u306a\u3044\u30b5\u30fc\u30d3\u30b9\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f\u8a8d\u8a3c\u3055\u308c\u306a\u3044<\/strong>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u6700\u3082\u591a\u3044\u4e8b\u6545\u306f\u3001SPF\u30ec\u30b3\u30fc\u30c9\u30922\u3064\u4ee5\u4e0a\u516c\u958b\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u3067\u3059\u3002\u65b0\u3057\u3044\u30c4\u30fc\u30eb\u3092\u5c0e\u5165\u3059\u308b\u3068\u304d\u306b\u65e2\u5b58\u306e\u30ec\u30b3\u30fc\u30c9\u3078\u8ffd\u8a18\u305b\u305a\u3001\u5225\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u8ffd\u52a0\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u53d7\u4fe1\u5074\u306f\u8907\u6570\u306eSPF\u30ec\u30b3\u30fc\u30c9\u3092\u691c\u51fa\u3057\u3066PermError\u3068\u5224\u5b9a\u3057\u3001<strong>SPF\u8a8d\u8a3c\u305d\u306e\u3082\u306e\u304c\u6210\u7acb\u3057\u306a\u304f\u306a\u308a\u307e\u3059<\/strong>\u3002\u8ffd\u8a18\u3067\u306f\u306a\u304f\u7d71\u5408\u304c\u539f\u5247\u3067\u3001\u65e2\u5b58\u30ec\u30b3\u30fc\u30c9\u306e\u4e2d\u8eab\u306binclude\u3092\u8db3\u3059\u5f62\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u3082\u30461\u3064\u306e\u5236\u7d04\u304cDNS\u53c2\u7167\u56de\u6570\u306e\u4e0a\u9650\u3067\u3059\u3002SPF\u306e\u8a55\u4fa1\u306f\u30ec\u30b3\u30fc\u30c9\u3092\u5de6\u304b\u3089\u9806\u306b\u51e6\u7406\u3057\u3001include\u3084a\u3001mx\u306e\u3088\u3046\u306bDNS\u554f\u3044\u5408\u308f\u305b\u3092\u5fc5\u8981\u3068\u3059\u308b\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u5f53\u305f\u308b\u305f\u3073\u306b\u53c2\u7167\u30921\u56de\u6d88\u8cbb\u3057\u307e\u3059\u3002\u3053\u306e\u56de\u6570\u304c10\u56de\u3092\u8d85\u3048\u305f\u6642\u70b9\u3067\u8a55\u4fa1\u3092\u6253\u3061\u5207\u308a\u3001PermError\u3092\u8fd4\u3057\u307e\u3059\u3002ip4\u3084ip6\u3067\u306e\u76f4\u63a5\u6307\u5b9a\u306f\u53c2\u7167\u3092\u6d88\u8cbb\u3057\u306a\u3044\u305f\u3081\u3001<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#fff3a3 60%)\">include\u3092\u5c55\u958b\u3057\u3066IP\u30a2\u30c9\u30ec\u30b9\u3092\u76f4\u63a5\u66f8\u304f\u300c\u30d5\u30e9\u30c3\u30c8\u5316\u300d\u3067\u56de\u6570\u3092\u6e1b\u3089\u3059<\/span>\u3068\u3044\u3046\u624b\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u63d0\u4f9b\u5074\u306eIP\u5909\u66f4\u306b\u8ffd\u5f93\u3067\u304d\u306a\u3044\u3068\u9006\u306b\u8a8d\u8a3c\u304c\u58ca\u308c\u308b\u306e\u3067\u3001\u8ffd\u5f93\u306e\u904b\u7528\u3092\u6c7a\u3081\u3089\u308c\u308b\u5834\u5408\u306b\u9650\u3063\u3066\u63a1\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">DKIM\u306e\u6709\u52b9\u5316\u3068\u9375\u306e\u516c\u958b<\/h2>\n\n\n<p class=\"wp-block-paragraph\">DKIM\u306f\u9001\u4fe1\u5143\u3054\u3068\u306b\u500b\u5225\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002Google Workspace\u3067\u3042\u308c\u3070\u7ba1\u7406\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u30c9\u30e1\u30a4\u30f3\u306eDKIM\u9375\u3092\u751f\u6210\u3057\u3001\u8868\u793a\u3055\u308c\u305f\u30bb\u30ec\u30af\u30bf\u3068TXT\u5024\u3092DNS\u306b\u8ffd\u52a0\u3057\u3066\u304b\u3089\u300c\u8a8d\u8a3c\u958b\u59cb\u300d\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u914d\u4fe1\u30c4\u30fc\u30eb\u3084MA\u30c4\u30fc\u30eb\u3082\u6d41\u308c\u306f\u540c\u3058\u3067\u3001\u7ba1\u7406\u753b\u9762\u3067\u767a\u884c\u3055\u308c\u305f\u5024\u3092DNS\u306b\u767b\u9332\u3057\u3001\u30c4\u30fc\u30eb\u5074\u3067\u691c\u8a3c\u3055\u305b\u307e\u3059\u3002<strong>DNS\u306b\u767b\u9332\u3057\u305f\u3060\u3051\u3067\u306f\u6709\u52b9\u306b\u306a\u3089\u305a\u3001\u30c4\u30fc\u30eb\u5074\u3067\u6709\u52b9\u5316\u306e\u64cd\u4f5c\u304c\u5fc5\u8981<\/strong>\u306a\u88fd\u54c1\u304c\u591a\u3044\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u30bb\u30ec\u30af\u30bf\u304c\u9001\u4fe1\u5143\u3054\u3068\u306b\u7570\u306a\u308b\u305f\u3081\u3001DKIM\u306f\u3044\u304f\u3064\u3067\u3082\u4e26\u5217\u306b\u5b58\u5728\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306fSPF\u3068\u5bfe\u7167\u7684\u306a\u6027\u8cea\u3067\u3001\u9001\u4fe1\u5143\u304c\u5897\u3048\u3066\u3082\u4e0a\u9650\u306b\u5f53\u305f\u308a\u307e\u305b\u3093\u3002\u3057\u305f\u304c\u3063\u3066\u9001\u4fe1\u5143\u304c\u591a\u3044\u4f1a\u793e\u3067\u306f\u3001<strong>SPF\u3067\u5168\u90e8\u3092\u901a\u305d\u3046\u3068\u305b\u305a\u3001DKIM\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3067DMARC\u3092\u901a\u3059\u8a2d\u8a08\u306b\u5bc4\u305b\u308b<\/strong>\u306e\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002SPF\u306f\u81ea\u793e\u306e\u4e3b\u8981\u306a\u9001\u4fe1\u7d4c\u8def\u306b\u7d5e\u308a\u3001\u305d\u308c\u4ee5\u5916\u306fDKIM\u3067\u62c5\u4fdd\u3059\u308b\u3068\u3044\u3046\u5206\u62c5\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u904b\u7528\u9762\u3067\u306f\u3001\u9375\u306e\u5165\u308c\u66ff\u3048\u3092\u60f3\u5b9a\u3057\u3066\u304a\u304d\u307e\u3059\u3002\u30bb\u30ec\u30af\u30bf\u3092\u5909\u3048\u305f\u65b0\u3057\u3044\u9375\u3092DNS\u306b\u8ffd\u52a0\u3057\u3001\u5207\u308a\u66ff\u3048\u5f8c\u306b\u65e7\u30bb\u30ec\u30af\u30bf\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u6b8b\u3057\u305f\u307e\u307e\u4e00\u5b9a\u671f\u9593\u7f6e\u3044\u3066\u304b\u3089\u524a\u9664\u3059\u308b\u3001\u3068\u3044\u3046\u624b\u9806\u306b\u3059\u308c\u3070\u914d\u4fe1\u3092\u6b62\u3081\u305a\u306b\u4ea4\u63db\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u30012,048\u30d3\u30c3\u30c8\u9375\u306e\u516c\u958b\u9375\u306fTXT\u30ec\u30b3\u30fc\u30c9\u306e1\u6587\u5b57\u5217\u4e0a\u9650\u3092\u8d85\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u3001DNS\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u306f\u8907\u6570\u6587\u5b57\u5217\u306b\u5206\u5272\u3057\u3066\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u767b\u9332\u5f8c\u306b\u691c\u8a3c\u30c4\u30fc\u30eb\u3067pass\u3059\u308b\u304b\u3092\u5fc5\u305a\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">DMARC\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u3068\u30bf\u30b0\u306e\u610f\u5473<\/h2>\n\n\n<p class=\"wp-block-paragraph\">DMARC\u30ec\u30b3\u30fc\u30c9\u306f\u8907\u6570\u306e\u30bf\u30b0\u3092\u30bb\u30df\u30b3\u30ed\u30f3\u3067\u533a\u5207\u3063\u3066\u4e26\u3079\u307e\u3059\u3002\u76e3\u8996\u6bb5\u968e\u304b\u3089\u5c11\u3057\u9032\u3093\u3067\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u30dd\u30ea\u30b7\u30fc\u3084\u9069\u7528\u5272\u5408\u307e\u3067\u6307\u5b9a\u3057\u305f\u4f8b\u3092\u6319\u3052\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>_dmarc.example.com.  IN  TXT  \"v=DMARC1; p=quarantine; sp=reject; pct=50; adkim=r; aspf=r; rua=mailto:dmarc-rua@example.com; ruf=mailto:dmarc-ruf@example.com; fo=1\"<\/code><\/pre>\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>\u30bf\u30b0<\/th><th>\u5fc5\u9808\uff0f\u4efb\u610f<\/th><th>\u610f\u5473\u3068\u4f7f\u3044\u3069\u3053\u308d<\/th><\/tr><\/thead><tbody><tr><td>v<\/td><td>\u5fc5\u9808<\/td><td>DMARC\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3002v=DMARC1\u3067\u56fa\u5b9a<\/td><\/tr><tr><td>p<\/td><td>\u5fc5\u9808<\/td><td>\u30dd\u30ea\u30b7\u30fc\u3002none\uff0fquarantine\uff0freject\u306e\u3044\u305a\u308c\u304b<\/td><\/tr><tr><td>sp<\/td><td>\u4efb\u610f<\/td><td>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u9069\u7528\u3059\u308b\u30dd\u30ea\u30b7\u30fc\u3002\u89aa\u3068\u5225\u6271\u3044\u306b\u3057\u305f\u3044\u3068\u304d\u306b\u6307\u5b9a<\/td><\/tr><tr><td>rua<\/td><td>\u63a8\u5968<\/td><td>\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4fe1\u5148\u3002mailto:\u3092\u4ed8\u3051\u308b<\/td><\/tr><tr><td>ruf<\/td><td>\u4efb\u610f<\/td><td>\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4fe1\u5148\u3002\u9001\u3063\u3066\u3053\u306a\u3044\u4e8b\u696d\u8005\u3082\u591a\u3044<\/td><\/tr><tr><td>pct<\/td><td>\u4efb\u610f<\/td><td>\u30dd\u30ea\u30b7\u30fc\u3092\u9069\u7528\u3059\u308b\u5272\u5408\uff080\u301c100\uff09\u3002\u6bb5\u968e\u79fb\u884c\u306b\u4f7f\u3046<\/td><\/tr><tr><td>adkim \/ aspf<\/td><td>\u4efb\u610f<\/td><td>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u53b3\u683c\u5ea6\u3002r=relaxed\uff08\u65e2\u5b9a\uff09\uff0fs=strict<\/td><\/tr><tr><td>fo<\/td><td>\u4efb\u610f<\/td><td>\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u3092\u751f\u6210\u3059\u308b\u6761\u4ef6\u306e\u6307\u5b9a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u30df\u30b9\u306e\u5b9a\u756a\u306f4\u3064\u3042\u308a\u307e\u3059\u3002\u30db\u30b9\u30c8\u540d\u306e<strong>_dmarc<\/strong>\u306e\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3092\u843d\u3068\u3059\u3001\u30bf\u30b0\u306e\u533a\u5207\u308a\u306e\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u5fd8\u308c\u308b\u3001rua\u306e\u5024\u306bmailto:\u3092\u66f8\u304d\u5fd8\u308c\u308b\u3001\u305d\u3057\u3066SPF\u3068DKIM\u304c\u6574\u3063\u3066\u3044\u306a\u3044\u3046\u3061\u306bp\u3092reject\u306b\u3059\u308b\u3001\u3067\u3059\u3002\u524d\u306e3\u3064\u306f\u30ec\u30b3\u30fc\u30c9\u304c\u89e3\u91c8\u3055\u308c\u305aDMARC\u304c\u6a5f\u80fd\u3057\u306a\u3044\u3060\u3051\u3067\u6e08\u307f\u307e\u3059\u304c\u3001\u6700\u5f8c\u306e1\u3064\u306f\u6b63\u898f\u30e1\u30fc\u30eb\u306e\u6d88\u5931\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<strong>\u516c\u958b\u76f4\u5f8c\u306b\u691c\u8a3c\u30c4\u30fc\u30eb\u3067\u30ec\u30b3\u30fc\u30c9\u304c\u6b63\u3057\u304f\u8aad\u3081\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b<\/strong>\u5de5\u7a0b\u3092\u3001\u5fc5\u305a\u631f\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u30ec\u30dd\u30fc\u30c8\u306e\u53d7\u3051\u53d6\u308a\u5148\u3092\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u4ee5\u5916\uff08\u5916\u90e8\u306e\u89e3\u6790\u30b5\u30fc\u30d3\u30b9\u306a\u3069\uff09\u306b\u6307\u5b9a\u3059\u308b\u5834\u5408\u3001\u53d7\u3051\u53d6\u308b\u5074\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u300c\u3053\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u3063\u3066\u3088\u3044\u300d\u3068\u3044\u3046\u8a31\u53ef\u306eDNS\u30ec\u30b3\u30fc\u30c9\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u89e3\u6790\u30b5\u30fc\u30d3\u30b9\u3092\u4f7f\u3046\u3068\u304d\u306f\u3001\u6848\u5185\u3055\u308c\u305f\u8a31\u53ef\u30ec\u30b3\u30fc\u30c9\u306e\u767b\u9332\u6f0f\u308c\u304c\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30ec\u30dd\u30fc\u30c8\u304c1\u4ef6\u3082\u5c4a\u304b\u306a\u3044\u3068\u304d\u306f\u3001\u3053\u306e\u767b\u9332\u6f0f\u308c\u304c\u539f\u56e0\u3067\u3042\u308b\u3053\u3068\u304c\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">p=none\u304b\u3089reject\u3078\uff1a\u6bb5\u968e\u79fb\u884c\u306e\u9032\u3081\u65b9<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u6bb5\u968e\u79fb\u884c\u306e\u76ee\u7684\u306f\u3001<strong>\u77e5\u3089\u306a\u3044\u9001\u4fe1\u7d4c\u8def\u3092\u7099\u308a\u51fa\u3057\u3066\u304b\u3089\u7de0\u3081\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002\u5b9f\u52d9\u3067\u306f\u3001\u7d4c\u7406\u30b7\u30b9\u30c6\u30e0\u306e\u901a\u77e5\u30e1\u30fc\u30eb\u3001\u63a1\u7528\u7ba1\u7406\u30c4\u30fc\u30eb\u304b\u3089\u306e\u81ea\u52d5\u8fd4\u4fe1\u3001\u793e\u5185\u306e\u5225\u90e8\u7f72\u304c\u5951\u7d04\u3057\u3066\u3044\u305f\u914d\u4fe1\u30c4\u30fc\u30eb\u306a\u3069\u3001\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u90e8\u9580\u304c\u628a\u63e1\u3057\u3066\u3044\u306a\u3044\u7d4c\u8def\u304c\u5fc5\u305a\u51fa\u3066\u304d\u307e\u3059\u3002p=none\u306e\u671f\u9593\u306f\u305d\u308c\u3092\u898b\u3064\u3051\u308b\u305f\u3081\u306e\u6642\u9593\u3067\u3059\u3002\u76ee\u5b89\u306f2\u301c4\u9031\u9593\u3067\u3001\u6708\u6b21\u306e\u5b9a\u671f\u914d\u4fe1\u304c\u3042\u308b\u5834\u5408\u306f\u5c11\u306a\u304f\u3068\u30821\u30b5\u30a4\u30af\u30eb\u5206\u3092\u542b\u3081\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u6b21\u306bpct\u30bf\u30b0\u3092\u4f7f\u3063\u3066\u90e8\u5206\u9069\u7528\u3057\u307e\u3059\u3002p=quarantine\u3067pct=25\u3068\u3059\u308c\u3070\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u3046\u306125%\u3060\u3051\u304c\u9694\u96e2\u3055\u308c\u3001\u6b8b\u308a\u306f\u53d7\u4fe1\u5074\u306e\u5224\u65ad\u306b\u59d4\u306d\u3089\u308c\u307e\u3059\u3002\u3053\u3053\u30671\u301c2\u9031\u9593\u305a\u3064\u69d8\u5b50\u3092\u898b\u306a\u304c\u308950%\u3001100%\u3078\u5e83\u3052\u3001\u554f\u984c\u304c\u306a\u3051\u308c\u3070reject\u3078\u79fb\u3057\u307e\u3059\u3002<strong>\u5404\u6bb5\u968e\u3067\u300c\u914d\u4fe1\u3067\u304d\u3066\u3044\u306a\u3044\u300d\u3068\u3044\u3046\u793e\u5185\u304b\u3089\u306e\u7533\u544a\u304c\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3059\u308b<\/strong>\u306e\u304c\u3001\u5b9f\u8cea\u7684\u306a\u691c\u8a3c\u624b\u6bb5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u898b\u843d\u3068\u3057\u304c\u3061\u306a\u306e\u304c\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u6271\u3044\u3067\u3059\u3002DMARC\u306f\u89aa\u30c9\u30e1\u30a4\u30f3\u306e\u30dd\u30ea\u30b7\u30fc\u304c\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u3082\u7d99\u627f\u3055\u308c\u307e\u3059\u304c\u3001sp\u30bf\u30b0\u3067\u5225\u6271\u3044\u306b\u3067\u304d\u307e\u3059\u3002\u9006\u306b\u3001<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#cfe9ff 60%)\">\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u4f7f\u3063\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u3084\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306f\u3001\u6700\u521d\u304b\u3089p=reject\u3067\u5ba3\u8a00\u3057\u3066\u304a\u304f<\/span>\u306e\u304c\u5b89\u5168\u3067\u3059\u3002\u4f11\u7720\u30c9\u30e1\u30a4\u30f3\u306f\u3001\u306a\u308a\u3059\u307e\u3057\u306b\u4f7f\u308f\u308c\u3084\u3059\u3044\u5272\u306b\u81ea\u793e\u306e\u6b63\u898f\u914d\u4fe1\u3092\u58ca\u3059\u5fc3\u914d\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u4f7f\u3063\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u3053\u305d\u771f\u3063\u5148\u306b\u7de0\u3081\u308b\u3068\u3044\u3046\u9806\u5e8f\u3092\u899a\u3048\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">DMARC\u30ec\u30dd\u30fc\u30c8\u306e\u8aad\u307f\u65b9<\/h2>\n\n\n<p class=\"wp-block-paragraph\">DMARC\u306e\u30ec\u30dd\u30fc\u30c8\u306b\u306f2\u7a2e\u985e\u3042\u308a\u307e\u3059\u3002rua\u3067\u53d7\u3051\u53d6\u308b<strong>\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\uff08Aggregate Report\uff09<\/strong>\u306fXML\u5f62\u5f0f\u306e\u7d71\u8a08\u60c5\u5831\u3067\u3001\u901a\u5e3824\u6642\u9593\u3054\u3068\u306b\u9001\u3089\u308c\u3066\u304d\u307e\u3059\u3002\u904b\u7528\u306e\u4e2d\u5fc3\u306f\u3053\u3061\u3089\u3067\u3059\u3002\u3082\u3046\u4e00\u65b9\u306eruf\u3067\u53d7\u3051\u53d6\u308b\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u306f\u500b\u5225\u30e1\u30fc\u30eb\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u542b\u3080\u305f\u3081\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3078\u306e\u914d\u616e\u304b\u3089\u9001\u4fe1\u3057\u306a\u3044\u4e8b\u696d\u8005\u3082\u591a\u304f\u3001\u5c4a\u304b\u306a\u3044\u524d\u63d0\u3067\u8a2d\u8a08\u3059\u308b\u306e\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u3067\u898b\u308b\u3079\u304d\u70b9\u306f\u7d5e\u308c\u307e\u3059\u3002\u7b2c\u4e00\u306b<strong>source_ip<\/strong>\u2014\u2014\u3069\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u308b\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u3066\u3044\u308b\u304b\u3002\u898b\u899a\u3048\u306e\u306a\u3044IP\u304c\u7d99\u7d9a\u7684\u306b\u51fa\u3066\u3044\u308b\u306a\u3089\u3001\u306a\u308a\u3059\u307e\u3057\u304b\u3001\u628a\u63e1\u3057\u3066\u3044\u306a\u3044\u793e\u5185\u7d4c\u8def\u3067\u3059\u3002\u7b2c\u4e8c\u306b<strong>count<\/strong>\u2014\u2014\u305d\u306e\u7d4c\u8def\u306e\u901a\u6570\u3002\u7b2c\u4e09\u306bSPF\u3068DKIM\u306e\u7d50\u679c\u3001\u305d\u3057\u3066\u305d\u308c\u305e\u308c\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u6210\u5426\u3002\u7b2c\u56db\u306b<strong>disposition<\/strong>\u2014\u2014\u53d7\u4fe1\u5074\u304c\u5b9f\u969b\u306b\u3069\u3046\u6271\u3063\u305f\u304b\u3002\u3053\u306e4\u70b9\u3092\u7a81\u304d\u5408\u308f\u305b\u308b\u3068\u3001\u300c\u6b63\u898f\u306a\u306e\u306b\u8a8d\u8a3c\u3067\u843d\u3061\u3066\u3044\u308b\u7d4c\u8def\u300d\u304c\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">XML\u306f\u4eba\u304c\u8aad\u3080\u5f62\u5f0f\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u53ef\u8996\u5316\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u304b\u3001\u751f\u6210AI\u306b\u6574\u5f62\u3055\u305b\u308b\u306e\u304c\u5b9f\u52d9\u7684\u3067\u3059\u3002\u30ec\u30dd\u30fc\u30c8\u306eXML\u3092\u8cbc\u308a\u4ed8\u3051\u3066\u300c\u9001\u4fe1\u5143IP\u3054\u3068\u306b\u901a\u6570\u3068SPF\uff0fDKIM\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u7d50\u679c\u3092\u8868\u306b\u307e\u3068\u3081\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u308b\u7d4c\u8def\u3092\u901a\u6570\u306e\u591a\u3044\u9806\u306b\u4e26\u3079\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u6307\u793a\u3059\u308c\u3070\u3001\u78ba\u8a8d\u3059\u3079\u304d\u7d4c\u8def\u306e\u4e00\u89a7\u3092\u77ed\u6642\u9593\u3067\u4f5c\u308c\u307e\u3059\u3002\u305f\u3060\u3057<span class=\"swl-marker\" style=\"background:linear-gradient(transparent 60%,#fff3a3 60%)\">IP\u30a2\u30c9\u30ec\u30b9\u3084\u5b9b\u5148\u30c9\u30e1\u30a4\u30f3\u304c\u542b\u307e\u308c\u308b\u305f\u3081\u3001\u793e\u5916\u306b\u51fa\u305b\u308b\u30c7\u30fc\u30bf\u304b\u3069\u3046\u304b\u306f\u4e8b\u524d\u306b\u793e\u5185\u30eb\u30fc\u30eb\u3067\u78ba\u8a8d\u3059\u308b<\/span>\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5224\u65ad\u305d\u306e\u3082\u306e\u306f\u4eba\u304c\u884c\u3044\u3001AI\u306f\u6574\u5f62\u3068\u8981\u7d04\u306b\u4f7f\u3046\u3068\u3044\u3046\u5206\u62c5\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">MA\u30fb\u914d\u4fe1\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u5834\u5408\u306e\u8a8d\u8a3c\u8a2d\u5b9a<\/h2>\n\n\n<p class=\"wp-block-paragraph\">MA\u30c4\u30fc\u30eb\u3084\u30e1\u30fc\u30eb\u914d\u4fe1\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u5834\u5408\u3001\u65e2\u5b9a\u8a2d\u5b9a\u306e\u307e\u307e\u3067\u306fDMARC\u304c\u901a\u308a\u307e\u305b\u3093\u3002\u7406\u7531\u306f\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u7bc0\u3067\u89e6\u308c\u305f\u3068\u304a\u308a\u3001\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\u304c\u30c4\u30fc\u30eb\u306e\u5171\u6709\u30c9\u30e1\u30a4\u30f3\u306b\u306a\u308b\u305f\u3081\u3067\u3059\u3002\u5bfe\u51e6\u306f\u88fd\u54c1\u306b\u3088\u3063\u3066\u540d\u79f0\u304c\u7570\u306a\u308a\u307e\u3059\u304c\u3001<strong>\u300c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a2d\u5b9a\u300d\u300c\u30ab\u30b9\u30bf\u30e0\u30c9\u30e1\u30a4\u30f3\u300d\u300c\u30d0\u30a6\u30f3\u30b9\u30c9\u30e1\u30a4\u30f3\u300d\u300cReturn-Path\u30c9\u30e1\u30a4\u30f3\u300d<\/strong>\u3068\u3044\u3063\u305f\u30e1\u30cb\u30e5\u30fc\u304b\u3089\u3001\u81ea\u793e\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u767b\u9332\u3059\u308b\u6d41\u308c\u306b\u306a\u308a\u307e\u3059\u3002\u6307\u5b9a\u3055\u308c\u305fCNAME\u3084TXT\u30ec\u30b3\u30fc\u30c9\u3092DNS\u306b\u8ffd\u52a0\u3059\u308b\u3068\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3067\u306e\u7f72\u540d\u3068\u691c\u8a3c\u304c\u6210\u7acb\u3057\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3068\u304d\u3001\u914d\u4fe1\u5c02\u7528\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u5207\u308b\u304b\u3069\u3046\u304b\u3092\u6c7a\u3081\u3066\u304a\u304d\u307e\u3059\u3002\u305f\u3068\u3048\u3070news.example.com\u3092\u8ca9\u4fc3\u30e1\u30fc\u30eb\u5c02\u7528\u306b\u3057\u3001\u53d6\u5f15\u306b\u95a2\u308f\u308b\u30b7\u30b9\u30c6\u30e0\u901a\u77e5\u306f\u5225\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304b\u672c\u4f53\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u308b\u69cb\u6210\u3067\u3059\u3002<strong>\u7247\u65b9\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u8ff7\u60d1\u30e1\u30fc\u30eb\u5831\u544a\u304c\u5897\u3048\u3066\u3082\u3001\u3082\u3046\u7247\u65b9\u306e\u8a55\u4fa1\u306b\u6ce2\u53ca\u3057\u306b\u304f\u304f\u306a\u308b<\/strong>\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306b\u8a55\u5224\u3092\u80b2\u3066\u76f4\u3059\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u9001\u4fe1\u91cf\u304c\u5c0f\u3055\u3044\u4f1a\u793e\u3067\u306f\u672c\u4f53\u30c9\u30e1\u30a4\u30f3\u306b\u96c6\u7d04\u3057\u305f\u307b\u3046\u304c\u5b89\u5b9a\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u9001\u4fe1\u91cf\u3068\u7528\u9014\u306e\u6570\u3092\u898b\u3066\u6c7a\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u8907\u6570\u306e\u30c4\u30fc\u30eb\u3092\u4f75\u7528\u3057\u3066\u3044\u308b\u4f1a\u793e\u3067\u306f\u3001SPF\u306einclude\u6570\u304c\u3059\u3050\u306b\u5897\u3048\u3066DNS\u53c2\u7167\u306e\u4e0a\u9650\u306b\u8fd1\u3065\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u601d\u3044\u51fa\u3057\u305f\u3044\u306e\u304c\u3001DMARC\u306fSPF\u3068DKIM\u306e\u3069\u3061\u3089\u304b\u4e00\u65b9\u304c\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u4ed8\u304d\u3067pass\u3059\u308c\u3070\u901a\u308b\u3068\u3044\u3046\u6027\u8cea\u3067\u3059\u3002\u30c4\u30fc\u30eb\u3054\u3068\u306bDKIM\u3092\u78ba\u5b9f\u306b\u8a2d\u5b9a\u3057\u3001SPF\u306f\u4e3b\u8981\u7d4c\u8def\u306b\u7d5e\u308b\u3002\u3053\u306e\u65b9\u91dd\u306b\u3059\u308b\u3068\u3001\u30c4\u30fc\u30eb\u3092\u5897\u3084\u3057\u3066\u3082SPF\u306e\u4e0a\u9650\u306b\u89e6\u308c\u305a\u306b\u6e08\u307f\u307e\u3059\u3002<strong>SPF\u3092\u5897\u3084\u3059\u524d\u306bDKIM\u3092\u56fa\u3081\u308b<\/strong>\u2014\u2014\u3053\u308c\u304c\u9001\u4fe1\u5143\u306e\u591a\u3044\u74b0\u5883\u3067\u306e\u5b9a\u77f3\u3067\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u5931\u6557\uff1a10\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u8d85\u904e\u30fb\u8907\u6570SPF\u30fb\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u653e\u7f6e<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u4f5c\u696d\u305d\u306e\u3082\u306e\u306f\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5931\u6557\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u9a5a\u304f\u307b\u3069\u5171\u901a\u3057\u3066\u3044\u307e\u3059\u3002\u76f8\u8ac7\u306e\u5834\u3067\u5b9f\u969b\u306b\u898b\u3064\u304b\u308b\u3082\u306e\u3092\u6319\u3052\u307e\u3059\u3002<\/p>\n\n\n<ul class=\"is-style-bad_list wp-block-list\"><li>SPF\u30ec\u30b3\u30fc\u30c9\u304c2\u3064\u4ee5\u4e0a\u516c\u958b\u3055\u308c\u3066\u304a\u308a\u3001PermError\u3067SPF\u8a8d\u8a3c\u304c\u6210\u7acb\u3057\u3066\u3044\u306a\u3044<\/li><li>include\u3092\u8db3\u3057\u7d9a\u3051\u305f\u7d50\u679cDNS\u53c2\u7167\u304c10\u56de\u3092\u8d85\u3048\u3001\u30ec\u30b3\u30fc\u30c9\u306e\u5f8c\u534a\u304c\u8a55\u4fa1\u3055\u308c\u3066\u3044\u306a\u3044<\/li><li>\u89e3\u7d04\u6e08\u307f\u306e\u30c4\u30fc\u30eb\u3084\u4f7f\u3063\u3066\u3044\u306a\u3044\u65e7\u30b7\u30b9\u30c6\u30e0\u306einclude\u304c\u6b8b\u3063\u305f\u307e\u307e\u653e\u7f6e\u3055\u308c\u3066\u3044\u308b<\/li><li>\u914d\u4fe1\u30c4\u30fc\u30eb\u3092\u65e2\u5b9a\u8a2d\u5b9a\u306e\u307e\u307e\u4f7f\u3044\u3001\u30d8\u30c3\u30c0\u30fcFrom\u3068\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u6210\u7acb\u3057\u3066\u3044\u306a\u3044<\/li><li>DMARC\u3092p=none\u3067\u516c\u958b\u3057\u305f\u307e\u307e\u6570\u5e74\u653e\u7f6e\u3057\u3001rua\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u8ab0\u3082\u898b\u3066\u3044\u306a\u3044<\/li><li>\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u4f7f\u3063\u3066\u3044\u306a\u3044\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306bDMARC\u304c\u306a\u304f\u3001\u306a\u308a\u3059\u307e\u3057\u306e\u5165\u53e3\u306b\u306a\u3063\u3066\u3044\u308b<\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306b\u5171\u901a\u3059\u308b\u6839\u3063\u3053\u306f\u3001<strong>\u9001\u4fe1\u5143\u306e\u68da\u5378\u3057\u304c\u4e00\u5ea6\u304d\u308a\u3067\u7d42\u308f\u3063\u3066\u3044\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002\u30c4\u30fc\u30eb\u306e\u5c0e\u5165\u3068\u89e3\u7d04\u306f\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u90e8\u9580\u3067\u65e5\u5e38\u7684\u306b\u8d77\u304d\u308b\u306e\u306b\u3001DNS\u30ec\u30b3\u30fc\u30c9\u306f\u305d\u306e\u5909\u5316\u3092\u81ea\u52d5\u3067\u8ffd\u3044\u304b\u3051\u3066\u304f\u308c\u307e\u305b\u3093\u3002\u534a\u5e74\u306b\u4e00\u5ea6\u3001\u5951\u7d04\u3057\u3066\u3044\u308b\u30c4\u30fc\u30eb\u306e\u4e00\u89a7\u3068SPF\u30fbDKIM\u306e\u8a2d\u5b9a\u72b6\u6cc1\u3092\u7a81\u304d\u5408\u308f\u305b\u308b\u6642\u9593\u3092\u53d6\u308b\u3060\u3051\u3067\u3001\u3053\u306e\u7a2e\u306e\u4e0d\u6574\u5408\u306f\u307b\u307c\u9632\u3052\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">SPF\u306e\u30d5\u30e9\u30c3\u30c8\u5316\u306b\u3064\u3044\u3066\u3082\u88dc\u8db3\u3057\u307e\u3059\u3002include\u3092\u5c55\u958b\u3057\u3066ip4\u3067\u76f4\u66f8\u304d\u3059\u308c\u3070DNS\u53c2\u7167\u306f\u6e1b\u308a\u307e\u3059\u304c\u3001\u30b5\u30fc\u30d3\u30b9\u63d0\u4f9b\u5074\u304cIP\u3092\u5909\u66f4\u3057\u305f\u3068\u304d\u306b\u81ea\u52d5\u3067\u306f\u8ffd\u5f93\u3057\u307e\u305b\u3093\u3002\u624b\u52d5\u904b\u7528\u306a\u3089\u5909\u66f4\u901a\u77e5\u3092\u8ffd\u3046\u62c5\u5f53\u3092\u6c7a\u3081\u3001\u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u306a\u3089\u305d\u306e\u8cbb\u7528\u3068\u7ba1\u7406\u30b3\u30b9\u30c8\u3092\u898b\u8fbc\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<strong>\u56de\u6570\u524a\u6e1b\u306e\u7b2c\u4e00\u624b\u306f\u3001\u307e\u305a\u4e0d\u8981\u306ainclude\u306e\u524a\u9664<\/strong>\u3067\u3059\u3002\u4f7f\u3063\u3066\u3044\u306a\u3044\u30b5\u30fc\u30d3\u30b9\u3092\u6d88\u3059\u3060\u3051\u3067\u4e0a\u9650\u3092\u4e0b\u56de\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u3001\u30d5\u30e9\u30c3\u30c8\u5316\u306f\u305d\u306e\u6b21\u306e\u624b\u6bb5\u3068\u4f4d\u7f6e\u3065\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">BIMI\u3068\u78ba\u8a8d\u306e\u904b\u7528\uff1a\u8a8d\u8a3c\u306e\u5148\u306b\u3042\u308b\u30ed\u30b4\u8868\u793a<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u6574\u3048\u305f\u5148\u306b\u306f\u3001\u53d7\u4fe1\u7bb1\u306e\u9001\u4fe1\u8005\u6b04\u306b\u81ea\u793e\u30ed\u30b4\u3092\u8868\u793a\u3059\u308b<strong>BIMI\uff08Brand Indicators for Message Identification\uff09<\/strong>\u3068\u3044\u3046\u4ed5\u7d44\u307f\u304c\u3042\u308a\u307e\u3059\u3002\u5bfe\u5fdc\u3059\u308b\u53d7\u4fe1\u74b0\u5883\u3067\u9001\u4fe1\u8005\u540d\u306e\u6a2a\u306b\u30d6\u30e9\u30f3\u30c9\u30ed\u30b4\u304c\u51fa\u308b\u305f\u3081\u3001\u958b\u5c01\u524d\u306e\u8b58\u5225\u6027\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002\u524d\u63d0\u6761\u4ef6\u306f\u3001DMARC\u304cp=quarantine\u307e\u305f\u306fp=reject\u3067\u904b\u7528\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3001\u898f\u5b9a\u306e\u5f62\u5f0f\u306eSVG\u30ed\u30b4\u3092\u7528\u610f\u3059\u308b\u3053\u3068\u3001\u305d\u3057\u3066BIMI\u7528\u306eDNS\u30ec\u30b3\u30fc\u30c9\u3092\u516c\u958b\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u30ed\u30b4\u306e\u6b63\u5f53\u6027\u3092\u793a\u3059\u8a3c\u660e\u66f8\u306b\u306f2\u7a2e\u985e\u3042\u308a\u307e\u3059\u3002<strong>VMC\uff08Verified Mark Certificate\uff09<\/strong>\u306f\u767b\u9332\u5546\u6a19\u3092\u5fc5\u8981\u3068\u3057\u3001\u5bfe\u5fdc\u74b0\u5883\u304c\u5e83\u3044\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002\u3082\u3046\u4e00\u65b9\u306e<strong>CMC\uff08Common Mark Certificate\uff09<\/strong>\u306fGmail\u5411\u3051\u306b2025\u5e74\u521d\u982d\u306b\u5c0e\u5165\u3055\u308c\u305f\u9078\u629e\u80a2\u3067\u3001\u5546\u6a19\u767b\u9332\u306f\u4e0d\u8981\u3067\u3059\u304c\u3001\u30c9\u30e1\u30a4\u30f3\u4e0a\u3067\u30ed\u30b4\u309212\u304b\u6708\u4ee5\u4e0a\u516c\u958b\u3057\u3066\u304d\u305f\u8a3c\u8de1\u304c\u6c42\u3081\u3089\u308c\u308b\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u8a3c\u660e\u66f8\u306e\u53d6\u5f97\u306b\u306f\u8cbb\u7528\u3068\u624b\u7d9a\u304d\u304c\u4f34\u3046\u305f\u3081\u3001BIMI\u306f\u300c\u8a8d\u8a3c\u304c\u6574\u3044\u3001DMARC\u3092reject\u3067\u904b\u7528\u3067\u304d\u3066\u3044\u308b\u4f1a\u793e\u304c\u6b21\u306b\u691c\u8a0e\u3059\u308b\u3082\u306e\u300d\u3068\u3044\u3046\u4f4d\u7f6e\u3065\u3051\u3067\u5341\u5206\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c\u306b\u3001\u8a2d\u5b9a\u5f8c\u306e\u70b9\u691c\u3092\u904b\u7528\u306b\u843d\u3068\u3057\u8fbc\u307f\u307e\u3059\u3002DNS\u306f\u4e00\u5ea6\u66f8\u3051\u3070\u52d5\u304d\u7d9a\u3051\u307e\u3059\u304c\u3001\u5468\u56f2\u306e\u74b0\u5883\u306f\u5909\u308f\u308a\u307e\u3059\u3002\u6708\u306b\u4e00\u5ea6\u3001\u6b21\u306e\u9805\u76ee\u3092\u78ba\u8a8d\u3059\u308b\u6642\u9593\u3092\u78ba\u4fdd\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<ul class=\"is-style-check_list wp-block-list\"><li>SPF\u30ec\u30b3\u30fc\u30c9\u304c1\u3064\u3060\u3051\u516c\u958b\u3055\u308c\u3066\u304a\u308a\u3001DNS\u53c2\u7167\u56de\u6570\u304c10\u56de\u4ee5\u5185\u306b\u53ce\u307e\u3063\u3066\u3044\u308b<\/li><li>\u5951\u7d04\u4e2d\u306e\u3059\u3079\u3066\u306e\u9001\u4fe1\u5143\u3067DKIM\u304c\u6709\u52b9\u306b\u306a\u308a\u3001\u691c\u8a3c\u30c4\u30fc\u30eb\u3067pass\u3057\u3066\u3044\u308b<\/li><li>DMARC\u306e\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u3092\u78ba\u8a8d\u3057\u3001\u6b63\u898f\u7d4c\u8def\u304c\u3059\u3079\u3066\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u4ed8\u304d\u3067pass\u3057\u3066\u3044\u308b<\/li><li>\u898b\u899a\u3048\u306e\u306a\u3044\u9001\u4fe1\u5143IP\u304b\u3089\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u308b\u30e1\u30fc\u30eb\u304c\u51fa\u3066\u3044\u306a\u3044<\/li><li>Google Postmaster Tools\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u304c0.10%\u672a\u6e80\u306b\u53ce\u307e\u3063\u3066\u3044\u308b<\/li><li>\u89e3\u7d04\u3057\u305f\u30c4\u30fc\u30eb\u306einclude\u3084DKIM\u30ec\u30b3\u30fc\u30c9\u304c\u6b8b\u3063\u3066\u3044\u306a\u3044<\/li><li>\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u4f7f\u3063\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u30fb\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306bp=reject\u306eDMARC\u304c\u3042\u308b<\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\">SPF\u306eDNS\u53c2\u7167\u56de\u6570\u306f\u3001\u30ec\u30b3\u30fc\u30c9\u3092\u53ef\u8996\u5316\u3059\u308b\u691c\u8a3c\u30b5\u30fc\u30d3\u30b9\uff08dmarcian\u306eSPF Surveyor\u306a\u3069\uff09\u3092\u4f7f\u3046\u3068\u4e00\u76ee\u3067\u5206\u304b\u308a\u307e\u3059\u3002\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u306fGoogle Postmaster Tools\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<strong>\u70b9\u691c\u306e\u983b\u5ea6\u3068\u62c5\u5f53\u8005\u3092\u5148\u306b\u6c7a\u3081\u3066\u304b\u3089\u8a2d\u5b9a\u4f5c\u696d\u306b\u5165\u308b<\/strong>\u3068\u3001\u516c\u958b\u5f8c\u306b\u653e\u7f6e\u3055\u308c\u308b\u4e8b\u614b\u3092\u907f\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n<h3 class=\"wp-block-heading\">SPF\u3060\u3051\u8a2d\u5b9a\u3057\u3066\u3042\u308c\u3070\u5341\u5206\u3067\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u91cf\u304c\u5c0f\u3055\u3051\u308c\u3070\u3001Gmail\u306e\u300c\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005\u300d\u5411\u3051\u8981\u4ef6\u306fSPF\u307e\u305f\u306fDKIM\u306e\u3044\u305a\u308c\u304b\u3067\u6e80\u305f\u305b\u307e\u3059\u3002\u305f\u3060\u3057SPF\u306f\u30e1\u30fc\u30eb\u304c\u8ee2\u9001\u3055\u308c\u308b\u3068\u5931\u6557\u3057\u3084\u3059\u304f\u3001\u914d\u4fe1\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u3068\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u6210\u7acb\u3057\u306a\u3044\u3053\u3068\u3082\u591a\u3044\u305f\u3081\u3001\u5b9f\u52d9\u3067\u306fDKIM\u3082\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u307b\u3046\u304c\u5b89\u5b9a\u3057\u307e\u3059\u30021\u65e55,000\u4ef6\u4ee5\u4e0a\u3092Gmail\u5b9b\u306b\u9001\u308b\u5834\u5408\u306f\u3001SPF\u3068DKIM\u306e\u4e21\u65b9\u3068DMARC\u304c\u8981\u4ef6\u3067\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">DMARC\u3092p=none\u306e\u307e\u307e\u306b\u3057\u3066\u3044\u3066\u3082\u610f\u5473\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u3042\u308a\u307e\u3059\u3002p=none\u306f\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u6271\u3044\u3092\u5909\u3048\u307e\u305b\u3093\u304c\u3001\u96c6\u7d04\u30ec\u30dd\u30fc\u30c8\u304c\u5c4a\u304f\u3088\u3046\u306b\u306a\u308b\u305f\u3081\u3001\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u308b\u30e1\u30fc\u30eb\u306e\u5b9f\u614b\u304c\u898b\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002Gmail\u306e\u4e00\u62ec\u9001\u4fe1\u8005\u8981\u4ef6\u3082p=none\u3067\u6e80\u305f\u305b\u307e\u3059\u3002\u3068\u306f\u3044\u3048\u3001none\u306e\u307e\u307e\u3067\u306f\u306a\u308a\u3059\u307e\u3057\u3092\u6b62\u3081\u3089\u308c\u306a\u3044\u305f\u3081\u3001\u30ec\u30dd\u30fc\u30c8\u3067\u6b63\u898f\u7d4c\u8def\u3092\u78ba\u8a8d\u3067\u304d\u305f\u6bb5\u968e\u3067quarantine\u3001reject\u3078\u9032\u3081\u308b\u306e\u304c\u672c\u6765\u306e\u4f7f\u3044\u65b9\u3067\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u9001\u4fe1\u91cf\u304c\u5c11\u306a\u3044\u4f1a\u793e\u3067\u3082\u8a2d\u5b9a\u306f\u5fc5\u8981\u3067\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u5fc5\u8981\u3067\u3059\u3002\u8981\u4ef6\u306e\u7dda\u5f15\u304d\u306f1\u65e55,000\u4ef6\u3067\u3059\u304c\u3001\u305d\u308c\u672a\u6e80\u3067\u3082SPF\u307e\u305f\u306fDKIM\u306f\u5168\u9001\u4fe1\u8005\u5411\u3051\u306e\u8981\u4ef6\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u308b\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306f\u9001\u4fe1\u91cf\u3068\u7121\u95a2\u4fc2\u306b\u767a\u751f\u3057\u5f97\u307e\u3059\u3002\u53d6\u5f15\u5148\u306b\u507d\u306e\u8acb\u6c42\u30e1\u30fc\u30eb\u304c\u5c4a\u304f\u30ea\u30b9\u30af\u3092\u8003\u3048\u308c\u3070\u3001\u9001\u4fe1\u91cf\u306e\u5927\u5c0f\u3067\u306f\u306a\u304f<strong>\u30c9\u30e1\u30a4\u30f3\u3092\u6301\u3063\u3066\u3044\u308b\u4f1a\u793e\u304c\u5099\u3048\u308b\u3079\u304d\u8a2d\u5b9a<\/strong>\u3068\u6349\u3048\u308b\u306e\u304c\u59a5\u5f53\u3067\u3059\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n<p 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