{"id":21318,"date":"2026-02-20T16:19:04","date_gmt":"2026-02-20T07:19:04","guid":{"rendered":"https:\/\/blastmail.jp\/blog\/?p=21318"},"modified":"2026-02-20T16:20:17","modified_gmt":"2026-02-20T07:20:17","slug":"dmarc-setup-guide","status":"publish","type":"post","link":"https:\/\/blastmail.jp\/blog\/spam\/dmarc-setup-guide","title":{"rendered":"DMARC\u306e\u8a2d\u5b9a\u65b9\u6cd5\u30925\u5206\u3067\u7406\u89e3\uff01\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u304b\u3089\u78ba\u8a8d\u624b\u9806\u307e\u3067\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2026\/02\/dmarc-setup-guide.jpg\" alt=\"DMARC\u306e\u8a2d\u5b9a\u65b9\u6cd5\u30925\u5206\u3067\u7406\u89e3\uff01\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u304b\u3089\u78ba\u8a8d\u624b\u9806\u307e\u3067\u5fb9\u5e95\u89e3\u8aac\u306e\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u753b\u50cf\" width=\"1024\" height=\"559\" class=\"alignnone size-full wp-image-21324\" \/><\/p>\n<p>\u300cDMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u306e\u8a2d\u5b9a\u306f\u304a\u6e08\u307f\u3067\u3059\u304b\uff1f\u300d\u3082\u3057\u3001\u3053\u306e\u8cea\u554f\u306b\u5373\u7b54\u3067\u304d\u306a\u3044\u3001\u3042\u308b\u3044\u306f\u300cSPF\u3068DKIM\u306f\u3084\u3063\u305f\u3051\u3069\u3001DMARC\u306f\u307e\u3060\u2026\u300d\u3068\u3044\u3046\u72b6\u614b\u306a\u306e\u3067\u3042\u308c\u3070\u3001\u3042\u306a\u305f\u306e\u4f1a\u793e\u306f\u4eca\u3001\u91cd\u5927\u306a\u30ea\u30b9\u30af\u306b\u6652\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>2024\u5e742\u6708\u3001Google\u3068\u7c73\u56fdGmail\u30c1\u30fc\u30e0\u306f\u300c\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u3092\u5927\u5e45\u306b\u5237\u65b0\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001Gmail\u5b9b\u306b1\u65e55,000\u901a\u4ee5\u4e0a\u306e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005\u306b\u5bfe\u3057\u3066\u3001<span style=\"color: #ff0000;\"><strong>DMARC\u306e\u8a2d\u5b9a\u304c\u7fa9\u52d9\u5316\u3055\u308c\u305f<\/strong><\/span>\u306e\u3067\u3059\u3002\u300c\u3046\u3061\u306f\u305d\u3093\u306a\u306b\u9001\u3089\u306a\u3044\u304b\u3089\u95a2\u4fc2\u306a\u3044\u300d\u3068\u601d\u3063\u3066\u3044\u308b\u65b9\u3082\u6cb9\u65ad\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u5909\u66f4\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5168\u4f53\u306e\u300c\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5e38\u8b58\u300d\u3092\u5857\u308a\u66ff\u3048\u3064\u3064\u3042\u308a\u3001\u4eca\u3084\u4f01\u696d\u30c9\u30e1\u30a4\u30f3\u306b\u304a\u3044\u3066DMARC\u306f\u300c\u8a2d\u5b9a\u3057\u3066\u3044\u3066\u5f53\u305f\u308a\u524d\u300d\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>DMARC\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f\u3001\u9867\u5ba2\u306e\u53d7\u4fe1\u30c8\u30ec\u30a4\u306b\u5c4a\u304f\u524d\u306b\u300c\u306a\u308a\u3059\u307e\u3057\u300d\u3068\u7591\u308f\u308c\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u76f4\u884c\u3059\u308b\u304b\u3001\u6700\u60aa\u306e\u5834\u5408\u306f\u53d7\u4fe1\u62d2\u5426\uff08\u30d0\u30a6\u30f3\u30b9\uff09\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u3001DMARC\u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3053\u3068\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u6a5f\u4f1a\u3092\u81ea\u3089\u6368\u3066\u3066\u3044\u308b\u306e\u3068\u540c\u3058\u306a\u306e\u3067\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u4e00\u898b\u96e3\u3057\u305d\u3046\u306b\u898b\u3048\u308bDMARC\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3092\u3001\u5c02\u9580\u7528\u8a9e\u3092\u6975\u529b\u4f7f\u308f\u305a\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u304b\u3089\u3001\u5931\u6557\u3057\u306a\u3044\u305f\u3081\u306e\u6bb5\u968e\u7684\u306a\u5c0e\u5165\u30b9\u30c6\u30c3\u30d7\u3001\u305d\u3057\u3066\u8a2d\u5b9a\u5f8c\u306e\u904b\u7528\u65b9\u6cd5\u307e\u3067\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u306f\u306a\u3044\u62c5\u5f53\u8005\u3067\u3082\u4eca\u65e5\u304b\u3089\u5b9f\u8df5\u3067\u304d\u308b\u5185\u5bb9\u3092\u7db2\u7f85\u3057\u307e\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/blastmail.jp\/blog\/download\/bimi-doc\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2024\/06\/unnamed-1.jpg\" alt=\"bimi\u5b8c\u5168\u30ac\u30a4\u30c9\" width=\"1024\" height=\"373\" class=\"alignnone wp-image-21292 size-full\" \/><\/a><\/p>\n<h2>DMARC\u3068\u306f\uff1f<\/h2>\n<p>\u300cDMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u300d\u3092\u4e00\u8a00\u3067\u8868\u3059\u3068\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3092\u9a19\u3063\u305f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3078\u306e\u300c\u6700\u7d42\u7684\u306a\u51e6\u5206\u300d\u3092\u3001\u9001\u4fe1\u8005\u304c\u6307\u5b9a\u3067\u304d\u308b\u4ed5\u7d44\u307f\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u307e\u3067\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6280\u8853\uff08SPF\u3084DKIM\uff09\u306f\u3001\u3044\u308f\u3070\u300c\u8eab\u5206\u8a3c\u306e\u63d0\u793a\u300d\u307e\u3067\u3057\u304b\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002DMARC\u306f\u3001\u305d\u306e\u8eab\u5206\u8a3c\u304c\u507d\u7269\u3060\u3063\u305f\u5834\u5408\u306b\u300c\u305d\u306e\u4e0d\u5be9\u8005\u3092\u9580\u524d\u6255\u3044\u3059\u308b\u304b\u3001\u3072\u3068\u307e\u305a\u9694\u96e2\u3059\u308b\u304b\u300d\u3068\u3044\u3046\u660e\u78ba\u306a\u6307\u793a\u3092\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u306b\u4e0e\u3048\u308b\u5f79\u5272\u3092\u62c5\u3044\u307e\u3059\u3002<\/p>\n<h3>DMARC\u304c\u679c\u305f\u30593\u3064\u306e\u5f79\u5272<\/h3>\n<p>DMARC\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u4f01\u696d\u306f\u4ee5\u4e0b\u306e3\u3064\u306e\u5f37\u529b\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u4eab\u53d7\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u4e0d\u6b63\u5229\u7528\u306e\u9632\u6b62\uff08\u30dd\u30ea\u30b7\u30fc\u306e\u9069\u7528\uff09\uff1a<\/strong>\u7b2c\u4e09\u8005\u304c\u3042\u306a\u305f\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u52dd\u624b\u306b\u4f7f\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u308d\u3046\u3068\u3057\u3066\u3082\u3001\u53d7\u4fe1\u5074\u3067\u30d6\u30ed\u30c3\u30af\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u53ef\u8996\u5316\uff08\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\uff09\uff1a<\/strong>\u4e16\u754c\u4e2d\u306e\u3069\u3053\u304b\u3089\u3001\u8ab0\u304c\u81ea\u5206\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u4f7f\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u3044\u308b\u304b\u3001\u8a73\u7d30\u306a\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u30d6\u30e9\u30f3\u30c9\u306e\u4fdd\u8b77\uff1a<\/strong>\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u306b\u60aa\u7528\u3055\u308c\u308b\u30ea\u30b9\u30af\u3092\u4e0b\u3052\u3001\u9867\u5ba2\u304b\u3089\u306e\u4fe1\u983c\u3068\u300c\u30e1\u30fc\u30eb\u5230\u9054\u7387\u300d\u3092\u5b88\u308a\u307e\u3059\u3002<\/div><\/li>\n<\/ul>\n<h3>SPF\u30fbDKIM\u3068\u306e\u6c7a\u5b9a\u7684\u306a\u9055\u3044<\/h3>\n<p>\u300cSPF\u3084DKIM\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u304b\u3089\u5927\u4e08\u592b\u300d\u3068\u3044\u3046\u8aa4\u89e3\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306f\u5358\u4f53\u3067\u306f\u4e0d\u5341\u5206\u3067\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table data-path-to-node=\"12\">\n<thead>\n<tr>\n<td><strong>\u6280\u8853<\/strong><\/td>\n<td><strong>\u5f79\u5272\u306e\u30a4\u30e1\u30fc\u30b8<\/strong><\/td>\n<td><strong>\u5f31\u70b9<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"12,1,0,0\"><b data-path-to-node=\"12,1,0,0\" data-index-in-node=\"0\">SPF<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,1,1,0\">\u300c\u8a31\u53ef\u30ea\u30b9\u30c8\u300d\u306b\u8f09\u3063\u3066\u3044\u308bIP\u304b\u78ba\u8a8d<\/span><\/td>\n<td><span data-path-to-node=\"12,1,2,0\">\u8ee2\u9001\u30e1\u30fc\u30eb\u306b\u5f31\u304f\u3001\u507d\u88c5\u3092\u5b8c\u5168\u306b\u306f\u9632\u3052\u306a\u3044<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"12,2,0,0\"><b data-path-to-node=\"12,2,0,0\" data-index-in-node=\"0\">DKIM<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,2,1,0\">\u30e1\u30fc\u30eb\u306b\u300c\u96fb\u5b50\u7f72\u540d\u300d\u3092\u3057\u3066\u6539\u3056\u3093\u3092\u9632\u3050<\/span><\/td>\n<td><span data-path-to-node=\"12,2,2,0\">\u7f72\u540d\u304c\u306a\u3044\u30e1\u30fc\u30eb\u3078\u306e\u5bfe\u51e6\u6cd5\u3092\u6307\u793a\u3067\u304d\u306a\u3044<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"12,3,0,0\"><b data-path-to-node=\"12,3,0,0\" data-index-in-node=\"0\">DMARC<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,3,1,0\"><b data-path-to-node=\"12,3,1,0\" data-index-in-node=\"0\">\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u300c\u51e6\u5206\u300d\u3092\u547d\u4ee4\u3059\u308b<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,3,2,0\">SPF\/DKIM\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u6a5f\u80fd\u3057\u306a\u3044<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>DMARC\u306f\u3001SPF\u3068DKIM\u3068\u3044\u30462\u3064\u306e\u76fe\u3092\u4f7f\u3044\u3053\u306a\u3057\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3069\u3046\u6271\u3046\u304b\u306e\u300c\u30eb\u30fc\u30eb\uff08\u30dd\u30ea\u30b7\u30fc\uff09\u300d\u3092\u6c7a\u5b9a\u3059\u308b\u53f8\u4ee4\u5854\u306e\u3088\u3046\u306a\u5b58\u5728\u306a\u306e\u3067\u3059\u3002<\/p>\n<h3>DMARC\u306e3\u3064\u306e\u30dd\u30ea\u30b7\u30fc\u8a2d\u5b9a<\/h3>\n<p>\u8a18\u4e8b\u306e\u5192\u982d\u3067\u3082\u89e6\u308c\u305f\u901a\u308a\u3001DMARC\u306b\u306f3\u3064\u306e\u6bb5\u968e\uff08\u30dd\u30ea\u30b7\u30fc\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u7d42\u7684\u306b\u306f\u300c\u62d2\u5426\u300d\u3092\u76ee\u6307\u3059\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>p=none\uff08\u76e3\u8996\u30e2\u30fc\u30c9\uff09\uff1a<\/strong>\u307e\u305a\u306f\u3053\u3053\u304b\u3089\u3002\u30e1\u30fc\u30eb\u306f\u5236\u9650\u306a\u304f\u5c4a\u304d\u307e\u3059\u304c\u3001\u88cf\u5074\u3067\u300c\u306a\u308a\u3059\u307e\u3057\u300d\u306e\u72b6\u6cc1\u3092\u30ec\u30dd\u30fc\u30c8\u3067\u628a\u63e1\u3057\u307e\u3059\u3002<\/li>\n<li><strong>p=quarantine\uff08\u9694\u96e2\u30e2\u30fc\u30c9\uff09\uff1a<\/strong>\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u300c\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u300d\u3078\u76f4\u884c\u3055\u305b\u307e\u3059\u3002<\/li>\n<li><strong>p=reject\uff08\u62d2\u5426\u30e2\u30fc\u30c9\uff09\uff1a<\/strong>\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3001\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u5b8c\u5168\u306b\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002\u3053\u308c\u304c\u6700\u5f37\u306e\u9632\u5fa1\u72b6\u614b\u3067\u3059\u3002<\/div><\/li>\n<\/ul>\n<h3>SPF\/DKIM\u304cOK\u3067\u3082DMARC\u304c\u5931\u6557\u3059\u308b\uff01\uff1f\u300c\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u300d\u3068\u306f<\/h3>\n<p>\u300cSPF\u3082DKIM\u3082Pass\u3057\u3066\u3044\u308b\u306e\u306b\u3001\u306a\u305c\u304bDMARC\u304cFail\u306b\u306a\u308b\u300d\u3053\u306e\u539f\u56e0\u306e\u591a\u304f\u306f\u3001<strong>\u300c\u30c9\u30e1\u30a4\u30f3\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff08Domain Alignment\uff09\u300d<\/strong>\u306e\u4e0d\u4e00\u81f4\u3067\u3059\u3002<\/p>\n<p>DMARC\u304c\u300c\u5408\u683c\u300d\u3068\u3059\u308b\u306b\u306f\u3001\u5358\u306bSPF\/DKIM\u304c\u6210\u529f\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u306a\u304f\u3001<strong>\u300c\u30e1\u30fc\u30eb\u306e\u5dee\u51fa\u4eba\uff08From\u30a2\u30c9\u30ec\u30b9\uff09\u306e\u30c9\u30e1\u30a4\u30f3\u300d\u3068\u300cSPF\/DKIM\u3067\u8a8d\u8a3c\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u300d\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b<\/strong>\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"box01\"><span class=\"box-title\">\u3088\u304f\u3042\u308b\u5931\u6557\u4f8b<\/span>\n<ul>\n<li>From\u30a2\u30c9\u30ec\u30b9: info@company.com<\/li>\n<li>\u5229\u7528\u3057\u3066\u3044\u308b\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\uff08SendGrid\u306a\u3069\uff09\u306e\u7ba1\u7406\u30c9\u30e1\u30a4\u30f3: em1234.sendgrid.net<\/li>\n<li><strong>\u7d50\u679c<\/strong>: SPF\u306f sendgrid.net\n\u3067Pass\u3059\u308b\u304c\u3001From\u30c9\u30e1\u30a4\u30f3(company.com)\u3068\u4e00\u81f4\u3057\u306a\u3044\u305f\u3081\u3001<strong>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u4e0d\u4e00\u81f4\u3067DMARC\u306fFail<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u5916\u90e8\u306e\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3084SFA\u3001MA\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u969b\u306f\u3001\u5fc5\u305a\u300c\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\uff08DKIM\u4f5c\u6210\u8005\u7f72\u540d\uff09\u300d\u3092\u8a2d\u5b9a\u3057\u3001From\u30a2\u30c9\u30ec\u30b9\u3068\u8a8d\u8a3c\u30c9\u30e1\u30a4\u30f3\u3092\u4e00\u81f4\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff09\u3055\u305b\u308b\u3053\u3068\u304c\u6210\u529f\u306e\u9375\u3067\u3059\u3002\u4e00\u8db3\u98db\u3073\u306b\u5b8c\u4e86\u3055\u305b\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u307e\u305a\u306f <code>p=none<\/code> \u3067\u300c\u5ba3\u8a00\u300d\u3059\u308b\u3053\u3068\u304b\u3089\u59cb\u3081\u3001\u5f90\u3005\u306b\u5b89\u5168\u306a\u30e1\u30fc\u30eb\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30c9\u30e1\u30a4\u30f3\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u4ed5\u7d44\u307f\u3084\u3001\u5177\u4f53\u7684\u306a\u4e00\u81f4\u6761\u4ef6\uff08\u53b3\u683c\u30fb\u7de9\u548c\u30e2\u30fc\u30c9\uff09\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u3061\u3089\u306e\u8a18\u4e8b\u3067\u56f3\u89e3\u3068\u3068\u3082\u306b\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002\u4f75\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u95a2\u9023\u8a18\u4e8b\uff1a<a href=\"https:\/\/blastengine.jp\/blog_content\/dmarc-alignment\/\" target=\"_blank\" rel=\"noopener\">DMARC\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3068\u306f\uff1fSPF\/DKIM\u3068\u306e\u95a2\u4fc2\u6027\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a><\/p>\n<h2>DMARC\u8a2d\u5b9a\u304c\u300c\u5fc5\u9808\u300d\u3068\u306a\u3063\u305f\u80cc\u666f\u3068\u306f\uff1f<\/h2>\n<p>\u306a\u305c\u4eca\u3001\u4e16\u754c\u4e2d\u3067DMARC\u306e\u5c0e\u5165\u304c\u3053\u308c\u307b\u3069\u307e\u3067\u306b\u53eb\u3070\u308c\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u305d\u306e\u80cc\u666f\u306b\u306f\u3001\u5e74\u3005\u5de7\u5999\u5316\u3059\u308b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306e\u5897\u52a0\u3068\u3001\u305d\u308c\u306b\u5bfe\u6297\u3057\u3088\u3046\u3068\u3059\u308b\u30e1\u30fc\u30eb\u30d7\u30ed\u30d0\u30a4\u30c0\uff08Google, Yahoo!\u7b49\uff09\u306e\u5f37\u3044\u610f\u5fd7\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u306e\u5207\u308a\u672d<\/h3>\n<p>\u3053\u308c\u307e\u3067\u3001\u30e1\u30fc\u30eb\u306e\u4fe1\u983c\u6027\u3092\u8a3c\u660e\u3059\u308b\u6280\u8853\u3068\u3057\u3066\u306f\u300cSPF\uff08Sender Policy Framework\uff09\u300d\u3068\u300cDKIM\uff08DomainKeys Identified Mail\uff09\u300d\u304c\u4e3b\u6d41\u3067\u3057\u305f\u3002\u3082\u3061\u308d\u3093\u3053\u308c\u3089\u3082\u91cd\u8981\u3067\u3059\u304c\u3001\u5b9f\u306f\u3053\u308c\u3060\u3051\u3067\u306f\u9632\u3052\u306a\u3044\u300c\u7a74\u300d\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>SPF\/DKIM\u306e\u9650\u754c\uff1a<\/strong>\u53d7\u4fe1\u5074\u3067\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\uff08\uff1d\u306a\u308a\u3059\u307e\u3057\u306e\u7591\u3044\u304c\u3042\u308b\u30e1\u30fc\u30eb\uff09\u3092\u300c\u3069\u3046\u51e6\u7406\u3059\u308c\u3070\u3044\u3044\u304b\u300d\u306e\u6307\u793a\u304c\u51fa\u305b\u306a\u3044\u306e\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u53d7\u4fe1\u5074\u306e\u5224\u65ad\u4efb\u305b\u306b\u306a\u308a\u3001\u7d50\u679c\u3068\u3057\u3066\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304c\u53d7\u4fe1\u30c8\u30ec\u30a4\u306b\u5c4a\u3044\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/li>\n<li><strong>DMARC\u306e\u5f79\u5272\uff1a<\/strong>DMARC\u306f\u3001\u300c\u3082\u3057SPF\/DKIM\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u3089\u3001\u305d\u306e\u30e1\u30fc\u30eb\u3092\u3069\u3046\u6271\u3046\u304b\uff08\u901a\u3059\u304b\u3001\u6368\u3066\u308b\u304b\uff09\u300d\u3092\u3001\u9001\u4fe1\u8005\u5074\uff08\u3042\u306a\u305f\uff09\u304c\u53d7\u4fe1\u8005\u5074\uff08ISP\uff09\u306b\u547d\u4ee4\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u3064\u307e\u308aDMARC\u306f\u3001\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u60aa\u7528\u3055\u308c\u308b\u306e\u3092\u9632\u3050<strong>\u300c\u6700\u5f8c\u306e\u7826\u300d<\/strong>\u3067\u3042\u308a\u3001\u81ea\u793e\u306e\u30d6\u30e9\u30f3\u30c9\u3092\u5b88\u308b\u305f\u3081\u306e\u81ea\u885b\u7b56\u306a\u306e\u3067\u3059\u3002<\/p>\n<h3>Google\u30fbYahoo!\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u5bfe\u5fdc<\/h3>\n<p>\u3053\u306e\u6d41\u308c\u3092\u6c7a\u5b9a\u3065\u3051\u305f\u306e\u304c\u30012024\u5e74\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u5909\u66f4\u3067\u3059\u3002Google\u3068Yahoo!\u306f\u3001\u300c\u30e1\u30fc\u30eb\u53d7\u4fe1\u8005\u306e\u5b89\u5168\u3092\u5b88\u308b\u300d\u3068\u3044\u3046\u5927\u7fa9\u540d\u5206\u306e\u3082\u3068\u3001\u5927\u91cf\u9001\u4fe1\u8005\uff081\u65e55,000\u901a\u4ee5\u4e0a\uff09\u306b\u5bfe\u3057\u3066DMARC\u306e\u5c0e\u5165\u3092<strong>\u5fc5\u9808\u8981\u4ef6<\/strong>\u3068\u3057\u307e\u3057\u305f\u3002\u73fe\u5728\uff082025\u5e74\uff09\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u306e\u5e38\u8b58\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>SPF \/ DKIM \/ DMARC \u306e3\u70b9\u30bb\u30c3\u30c8\u306f\u5fc5\u9808\u3002<\/li>\n<li>\u7279\u306bDMARC\u306f\u3001\u6700\u4f4e\u3067\u3082\u300cp=none\uff08\u76e3\u8996\uff09\u300d\u306e\u8a2d\u5b9a\u304c\u5fc5\u8981\u3002<\/li>\n<li>\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u3089\u308c\u308b\u30e1\u30fc\u30eb\u306e\u8a8d\u8a3c\u72b6\u6cc1\u3092\u628a\u63e1\u3057\u3066\u3044\u306a\u3044\u4f01\u696d\u306f\u300c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u610f\u8b58\u304c\u4f4e\u3044\u300d\u3068\u307f\u306a\u3055\u308c\u308b\u3002<\/div><\/li>\n<\/ul>\n<p>\u672a\u8a2d\u5b9a\u306e\u307e\u307e\u3067\u3044\u308b\u30ea\u30b9\u30af\u306f\u3001\u5358\u306b\u300c\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u9055\u53cd\u300d\u3068\u3044\u3046\u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3042\u306a\u305f\u306e\u9001\u308b\u91cd\u8981\u306a\u8acb\u6c42\u66f8\u3001\u5951\u7d04\u66f4\u65b0\u306e\u304a\u77e5\u3089\u305b\u3001\u30e1\u30eb\u30de\u30ac\u3068\u3044\u3063\u305f\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u304c\u3001\u9867\u5ba2\u306b\u5c4a\u304b\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u65e5\u306b\u65e5\u306b\u9ad8\u307e\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001DMARC\u306b\u304a\u3044\u3066\u306f\u6700\u4f4e\u3067\u3082\u300cp=none\uff08\u76e3\u8996\uff09\u300d\u306e\u8a2d\u5b9a\u304c\u5fc5\u8981\u3068\u8a18\u8f09\u3057\u307e\u3057\u305f\u304c\u3001\u672c\u6765\u3067\u3042\u308c\u3070\u300cp=quarantine\uff08\u9694\u96e2\uff09\u300d\u3084\u300cp=reject\uff08\u62d2\u5426\uff09\u300d\u3078\u3068\u6bb5\u968e\u7684\u306b\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u5316\u3057\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u78ba\u5b9f\u306b\u6392\u9664\u3059\u308b\u306e\u304c\u7406\u60f3\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u4fdd\u8b77\u3068\u3001\u5230\u9054\u7387\u306e\u5411\u4e0a\u3092\u4e21\u7acb\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>DMARC\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u3068\u4e3b\u8981\u30bf\u30b0\u4e00\u89a7<\/h2>\n<p>\u300c\u96e3\u3057\u305d\u3046\u300d\u3068\u601d\u308f\u308c\u304c\u3061\u306aDMARC\u3067\u3059\u304c\u3001\u8a2d\u5b9a\u4f5c\u696d\u81ea\u4f53\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002\u3084\u308b\u3079\u304d\u3053\u3068\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u3092\u7ba1\u7406\u3057\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\u306b\u30011\u884c\u306e\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\uff08TXT\u30ec\u30b3\u30fc\u30c9\uff09\u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<h3>\u57fa\u672c\u7684\u306a\u30ec\u30b3\u30fc\u30c9\u306e\u69cb\u6210\uff08DNS TXT\u30ec\u30b3\u30fc\u30c9\uff09<\/h3>\n<p>\u5229\u7528\u3057\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\uff08\u304a\u540d\u524d.com\u3001Amazon Route53\u3001Cloudflare\u3001Xserver\u306a\u3069\uff09\u306e\u7ba1\u7406\u753b\u9762\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u4ee5\u4e0b\u306e\u60c5\u5831\u3092\u767b\u9332\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30db\u30b9\u30c8\u540d\uff08Record Name\uff09<\/strong>: <code>_dmarc<\/code><br \/>\n\u203b\u6ce8\uff1aDNS\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u542b\u3081\u3066 <code>_dmarc.yourdomain.com<\/code> \u3068\u5165\u529b\u3059\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u591a\u304f\u306f\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u90e8\u5206\u306e <code>_dmarc<\/code><br \/>\n\u3060\u3051\u3067OK\u3067\u3059\u3002<\/li>\n<li><strong>\u7a2e\u5225\uff08Type\uff09<\/strong>: <code>TXT<\/code><\/li>\n<li><strong>\u5024\uff08Value\uff09\u306e\u57fa\u672c\u5f62<\/strong>:\n<pre><code>v=DMARC1; p=none; rua=mailto:dmarc-report@example.com;<\/code><\/pre>\n<p>\u203b <code>dmarc-report@example.com<\/code> \u306e\u90e8\u5206\u306f\u3001\u5b9f\u969b\u306b\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308a\u305f\u3044\u81ea\u793e\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306b\u66f8\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<h3>\u3053\u308c\u3060\u3051\u306f\u899a\u3048\u3088\u3046\uff013\u3064\u306e\u5fc5\u9808\u30bf\u30b0\u89e3\u8aac<\/h3>\n<p>DMARC\u30ec\u30b3\u30fc\u30c9\u306f\u3001\u30bb\u30df\u30b3\u30ed\u30f3\uff08;\uff09\u3067\u533a\u5207\u3089\u308c\u305f\u300c\u30bf\u30b0\uff1d\u5024\u300d\u306e\u5f62\u5f0f\u3067\u8a18\u8ff0\u3057\u307e\u3059\u3002\u6700\u4f4e\u9650\u899a\u3048\u308b\u3079\u304d\u306f\u4ee5\u4e0b\u306e3\u3064\u3060\u3051\u3067\u3059\u3002<\/p>\n<h4>1. <code>v=DMARC1<\/code> (Version)<\/h4>\n<ul>\n<li><strong>\u610f\u5473<\/strong>: \u300c\u3053\u308c\u306fDMARC\u30ec\u30b3\u30fc\u30c9\u3067\u3059\u300d\u3068\u3044\u3046\u5ba3\u8a00\u3002<\/li>\n<li><strong>\u8a2d\u5b9a<\/strong>: \u5e38\u306b <code>DMARC1<\/code> \u3068\u8a18\u8ff0\u3057\u307e\u3059\u3002DMARC2\u306a\u3069\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\u3002\u5fc5\u305a\u30ec\u30b3\u30fc\u30c9\u306e<strong>\u5148\u982d<\/strong>\u306b\u66f8\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<h4>2. <code>p=<\/code> (Policy) : \u30dd\u30ea\u30b7\u30fc\u8a2d\u5b9a<\/h4>\n<ul>\n<li><strong>\u610f\u5473<\/strong>: \u300c\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\uff08\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\uff09\u3092\u3069\u3046\u6271\u3046\u304b\u300d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002DMARC\u306e\u6838\u3068\u306a\u308b\u8a2d\u5b9a\u3067\u3059\u3002<\/li>\n<li><strong>\u8a2d\u5b9a\u5024<\/strong>:\n<ul>\n<li><strong><code>none<\/code><\/strong>\uff08\u76e3\u8996\u306e\u307f\uff09:<br \/>\n\u4f55\u3082\u3057\u307e\u305b\u3093\u3002\u30e1\u30fc\u30eb\u306f\u305d\u306e\u307e\u307e\u5c4a\u304d\u307e\u3059\u304c\u3001\u65e5\u6b21\u30ec\u30dd\u30fc\u30c8\u3067\u300c\u306a\u308a\u3059\u307e\u3057\u300d\u306e\u72b6\u6cc1\u3092\u628a\u63e1\u3067\u304d\u307e\u3059\u3002<strong>\u5c0e\u5165\u521d\u671f\u306f\u5fc5\u305a\u3053\u308c\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/strong><\/li>\n<li><strong><code>quarantine<\/code><\/strong>\uff08\u9694\u96e2\uff09: \u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u3092\u3001\u53d7\u4fe1\u8005\u306e\u300c\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u300d\u3078\u9001\u308b\u3088\u3046\u6307\u793a\u3057\u307e\u3059\u3002<\/li>\n<li><strong><code>reject<\/code><\/strong>\uff08\u62d2\u5426\uff09: \u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u3092\u5b8c\u5168\u306b\u62d2\u5426\uff08\u53d7\u4fe1\u62d2\u5426\uff09\u3055\u305b\u307e\u3059\u3002\u6700\u3082\u5f37\u529b\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3067\u3059\u304c\u3001\u8a2d\u5b9a\u30df\u30b9\u3092\u3057\u305f\u6642\u306e\u30c0\u30e1\u30fc\u30b8\u3082\u6700\u5927\u3067\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>3. <code>rua=<\/code> (Reporting URI for Aggregate data)<\/h4>\n<ul>\n<li><strong>\u610f\u5473<\/strong>: DMARC\u306e\u300c\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\uff08Aggregate Report\uff09\u300d\u3092\u53d7\u3051\u53d6\u308b\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u8a2d\u5b9a<\/strong>: <code>mailto:\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9<\/code> \u306e\u5f62\u5f0f\u3067\u8a18\u8ff0\u3057\u307e\u3059\u3002\n<ul>\n<li><strong>\u5fc5\u9808\u306e\u7406\u7531<\/strong>: <code>p=none<\/code> \u306b\u3057\u305f\u3060\u3051\u3067\u306f\u610f\u5473\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u3063\u3066\u3001\u300c\u81ea\u5206\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u3069\u3053\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u300d\u3092\u77e5\u308b\u305f\u3081\u306b\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<li><strong>\u6ce8\u610f<\/strong>:<br \/>\n\u901a\u5e38\u306f\u3001DMARC\u3092\u8a2d\u5b9a\u3059\u308b\u30c9\u30e1\u30a4\u30f3\u3068\u540c\u3058\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u5916\u90e8\u30c9\u30e1\u30a4\u30f3\uff08\u4f8b\u3048\u3070Gmail\u30a2\u30c9\u30ec\u30b9\u306a\u3069\uff09\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\u306f\u3001\u53d7\u3051\u53d6\u308a\u5074\u3067\u3082\u8ffd\u52a0\u306e\u8a2d\u5b9a\u304c\u5fc5\u8981\u306b\u306a\u308b\u305f\u3081\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3059\u308b\u306e\u304c\u7121\u96e3\u3067\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u305d\u306e\u4ed6\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u30bf\u30b0\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a2d\u5b9a\uff09<\/h3>\n<p>\u4ee5\u4e0b\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u8a2d\u5b9a\u3092\u3059\u308b\u969b\u306b\u4f7f\u3046\u30bf\u30b0\u3067\u3059\u3002\u6700\u521d\u306f\u8a2d\u5b9a\u3057\u306a\u304f\u3066\u3082\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong><code>pct<\/code> (Percentage)<\/strong>:\n<ul>\n<li>\u30dd\u30ea\u30b7\u30fc\u3092\u9069\u7528\u3059\u308b\u30e1\u30fc\u30eb\u306e\u5272\u5408\u30920\u301c100%\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>\u4f8b: <code>p=reject; pct=20;<\/code> \u3068\u3059\u308b\u3068\u3001\u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u306e20%\u3060\u3051\u3092\u62d2\u5426\u3057\u3001\u6b8b\u308a80%\u306f\u901a\u3057\u307e\u3059\u3002<code>reject<\/code><br \/>\n\u3078\u306e\u79fb\u884c\u671f\u306b\u4f7f\u3044\u307e\u3059\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u306f100\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong><code>sp<\/code> (Subdomain Policy)<\/strong>:\n<ul>\n<li>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\uff08<code>mail.example.com<\/code>\u306a\u3069\uff09\u306b\u5bfe\u3059\u308b\u30dd\u30ea\u30b7\u30fc\u3092\u500b\u5225\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u30e1\u30a4\u30f3\u30c9\u30e1\u30a4\u30f3\u306e <code>p=<\/code> \u306e\u8a2d\u5b9a\u304c\u7d99\u627f\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong><code>aspf<\/code> \/ <code>adkim<\/code> (Alignment Mode)<\/strong>:\n<ul>\n<li>SPF\/DKIM\u306e\u7167\u5408\u30e2\u30fc\u30c9\u3002\u300c\u53b3\u683c\uff08strict\uff09\u300d\u304b\u300c\u7de9\u548c\uff08relaxed\uff09\u300d\u304b\u3092\u9078\u3073\u307e\u3059\u3002<\/li>\n<li>\u901a\u5e38\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e <code>r<\/code> (relaxed) \u3067\u904b\u7528\u3057\u307e\u3059\u3002<code>s<\/code> (strict)<br \/>\n\u306f\u53b3\u3057\u3059\u304e\u3066\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u304f\u306a\u308b\u30ea\u30b9\u30af\u304c\u9ad8\u3044\u305f\u3081\u3001\u7279\u6b8a\u306a\u4e8b\u60c5\u304c\u306a\u3044\u9650\u308a\u63a8\u5968\u3055\u308c\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u5931\u6557\u3057\u306a\u3044\uff01DMARC\u5c0e\u5165\u306e3\u30b9\u30c6\u30c3\u30d7<\/h2>\n<p>DMARC\u5c0e\u5165\u3067\u6700\u3082\u3084\u308a\u304c\u3061\u306a\u5931\u6557\u306f\u3001<strong>\u300c\u3044\u304d\u306a\u308a <code>p=reject<\/code> \u3092\u8a2d\u5b9a\u3057\u3066\u3001\u81ea\u793e\u306e\u30e1\u30fc\u30eb\u3092\u5c4a\u304b\u306a\u304f\u3059\u308b\u3053\u3068\u300d<\/strong>\u3067\u3059\u3002DMARC\u306f\u300c\u5165\u308c\u3066\u7d42\u308f\u308a\u300d\u3067\u306f\u306a\u304f\u3001\u6bb5\u968e\u7684\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ec\u30d9\u30eb\u3092\u4e0a\u3052\u3066\u3044\u304f\u904b\u7528\u304c\u5fc5\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306e3\u30b9\u30c6\u30c3\u30d7\u3067\u9032\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>Step 1\uff1aDNS\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u30ec\u30b3\u30fc\u30c9\u8ffd\u52a0<\/h3>\n<p>\u307e\u305a\u306f\u524d\u8ff0\u306e\u300c\u57fa\u672c\u5f62\u300d\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u3001DNS\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u8a2d\u5b9a\u4f8b\uff08\u307e\u305a\u306f\u76e3\u8996\u30e2\u30fc\u30c9\u304b\u3089\uff09<\/strong><\/p>\n<pre><code>_dmarc IN TXT \"v=DMARC1; p=none; rua=mailto:admin@example.com;\"<\/code><\/pre>\n<p>DNS\u306e\u8a2d\u5b9a\u5909\u66f4\u5f8c\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5168\u4f53\u306b\u53cd\u6620\u3055\u308c\u308b\u307e\u3067\u306b\u306f\u6570\u5206\u301c\u6570\u6642\u9593\uff08TTL\u306e\u8a2d\u5b9a\u306b\u3088\u308b\uff09\u304b\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u203bTTL\uff08Time To Live\uff09\u306f\u3001\u5c0e\u5165\u521d\u671f\u306f\u77ed\u3081\uff08300\u79d2\u301c600\u79d2\u7a0b\u5ea6\uff09\u306b\u3057\u3066\u304a\u304f\u3068\u3001\u8a2d\u5b9a\u30df\u30b9\u304c\u3042\u3063\u305f\u6642\u306b\u3059\u3050\u306b\u4fee\u6b63\u304c\u53cd\u6620\u3055\u308c\u308b\u306e\u3067\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n<h3>Step 2\uff1a\u307e\u305a\u306f\u300cp=none\uff08\u76e3\u8996\uff09\u300d\u304b\u3089\u59cb\u3081\u308b<\/h3>\n<p>\u7d76\u5bfe\u306b\u5b88\u3063\u3066\u307b\u3057\u3044\u9244\u5247\u3002\u305d\u308c\u306f\u3001<strong>\u300c\u6700\u521d\u306f\u5fc5\u305a <code>p=none<\/code> \u304b\u3089\u59cb\u3081\u308b\u300d<\/strong>\u3053\u3068\u3067\u3059\u3002<\/p>\n<p><code>p=none<\/code> \u306f\u300c\u8a8d\u8a3c\u5931\u6557\u3057\u3066\u3082\u30e1\u30fc\u30eb\u3092\u62d2\u5426\u3057\u306a\u3044\u300d\u8a2d\u5b9a\u3067\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u52b9\u679c\u306f\u30bc\u30ed\u3067\u3059\u304c\u3001\u3053\u306e\u671f\u9593\u306b\u91cd\u8981\u306a\u5f79\u5272\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306f<strong>\u300c\u73fe\u72b6\u628a\u63e1\uff08\u68da\u5378\u3057\uff09\u300d<\/strong>\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e1\u30fc\u30eb\u306f\u69d8\u3005\u306a\u7528\u9014\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u3057\u3063\u304b\u308a\u3068\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u793e\u54e1\u306ePC\u304b\u3089\u306e\u30e1\u30fc\u30eb\uff08Office365 \/ Google Workspace\uff09<\/li>\n<li>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\uff08\u30e1\u30eb\u30de\u30ac\u7528\uff09<\/li>\n<li>\u55b6\u696d\u652f\u63f4\u30b7\u30b9\u30c6\u30e0\uff08SFA\/CRM\uff09<\/li>\n<li>\u63a1\u7528\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0<\/li>\n<li>\u8acb\u6c42\u66f8\u767a\u884c\u30b7\u30b9\u30c6\u30e0<\/li>\n<li>\u81ea\u52d5\u8fd4\u4fe1\u30e1\u30fc\u30eb\u3092\u9001\u308bWeb\u30b5\u30fc\u30d0\u30fc<\/div><\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u5168\u3066\u304c\u3001\u6b63\u3057\u304fSPF\/DKIM\u8a8d\u8a3c\u3067\u304d\u3066\u3044\u308b\u3068\u65ad\u8a00\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u304b\u3002\u3082\u3057\u8a8d\u8a3c\u8a2d\u5b9a\u304c\u6f0f\u308c\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u304c\u3042\u308b\u72b6\u614b\u3067 <code>p=reject<\/code> \u306b\u3059\u308b\u3068\u3001<strong>\u305d\u308c\u3089\u306e\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u9001\u3089\u308c\u308b\u30e1\u30fc\u30eb\u306f\u3059\u3079\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/strong><\/p>\n<p>\u300c\u8acb\u6c42\u66f8\u304c\u5c4a\u304b\u306a\u3044\uff01\u300d\u300c\u63a1\u7528\u901a\u77e5\u304c\u6d88\u3048\u305f\uff01\u300d\u3068\u3044\u3063\u305f\u5927\u4e8b\u6545\u3092\u9632\u3050\u305f\u3081\u3001\u6700\u4f4e\u3067\u30822\u9031\u9593\u301c1\u30f6\u6708\u7a0b\u5ea6\u306f <code>p=none<\/code> \u3067\u904b\u7528\u3057\u3001\u30ec\u30dd\u30fc\u30c8\u3092\u53ce\u96c6\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>Step 3\uff1a\u30ec\u30dd\u30fc\u30c8\u3092\u5206\u6790\u3057\u3066\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u5316\u3059\u308b<\/h3>\n<p><code>p=none<\/code> \u3067\u904b\u7528\u4e2d\u306b\u5c4a\u304fDMARC\u30ec\u30dd\u30fc\u30c8\uff08\u5f8c\u8ff0\uff09\u3092\u5206\u6790\u3057\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u9001\u4fe1\u5143\u306f\u3059\u3079\u3066\u8a8d\u8a3cOK\u304b<\/strong>: \u5931\u6557\u3057\u3066\u3044\u308bIP\u30a2\u30c9\u30ec\u30b9\u304c\u3042\u308c\u3070\u3001SPF\u30ec\u30b3\u30fc\u30c9\u306b\u8ffd\u52a0\u3059\u308b\u304b\u3001DKIM\u7f72\u540d\u306e\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u4e0d\u5be9\u306a\u9001\u4fe1\u5143\uff08\u306a\u308a\u3059\u307e\u3057\uff09\u306f\u306a\u3044\u304b<\/strong>: \u81ea\u793e\u306b\u95a2\u4fc2\u306a\u3044IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u5927\u91cf\u306b\u9001\u4fe1\u3055\u308c\u3066\u304a\u308a\u3001\u304b\u3064\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u308c\u3070\u3001\u305d\u308c\u306f\u653b\u6483\u8005\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3067\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u3059\u3079\u3066\u8a8d\u8a3c\u30d1\u30b9\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u305f\u3089\u3001\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u5316\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong><code>p=none<\/code> \u2192 <code>p=quarantine<\/code><\/strong>: \u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u3092\u9694\u96e2\uff08\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u884c\u304d\uff09\u306b\u3057\u307e\u3059\u3002\u307e\u3060\u53d7\u4fe1\u62d2\u5426\u306f\u3057\u307e\u305b\u3093\u3002<\/li>\n<li><strong><code>p=quarantine<\/code> \u2192 <code>p=reject<\/code><\/strong>:\u6700\u7d42\u6bb5\u968e\u3067\u3059\u3002\u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u3092\u5b8c\u5168\u306b\u62d2\u5426\u3057\u307e\u3059\u3002\u3053\u3053\u307e\u3067\u304d\u3066\u521d\u3081\u3066\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u306a\u308a\u3059\u307e\u3057\u3092\u5b8c\u5168\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<h2>DMARC\u8a2d\u5b9a\u304c\u6b63\u3057\u304f\u3067\u304d\u305f\u304b\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5<\/h2>\n<p>DNS\u3078\u306e\u8a2d\u5b9a\u304c\u7d42\u308f\u3063\u305f\u3089\u3001\u6b63\u3057\u304f\u53cd\u6620\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u306e\u78ba\u8a8d\uff08nslookup \/ dig\uff09<\/h3>\n<p>PC\u306e\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\uff08Windows\uff09\u3084\u30bf\u30fc\u30df\u30ca\u30eb\uff08Mac\/Linux\uff09\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4><strong>Windows\u306e\u5834\u5408<\/strong><\/h4>\n<pre><code>nslookup -type=txt _dmarc.yourdomain.com<\/code><\/pre>\n<h4><strong>Mac\/Linux\u306e\u5834\u5408<\/strong><\/h4>\n<pre><code>dig txt _dmarc.yourdomain.com<\/code><\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\u306b <code>\"v=DMARC1; p=none; ...\"<\/code> \u3068\u3044\u3046\u6587\u5b57\u5217\u304c\u8868\u793a\u3055\u308c\u308c\u3070\u3001DNS\u3078\u306e\u767b\u9332\u306f\u6210\u529f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30aa\u30f3\u30e9\u30a4\u30f3DMARC\u30c1\u30a7\u30c3\u30ab\u30fc\u306e\u6d3b\u7528<\/h3>\n<p>\u30b3\u30de\u30f3\u30c9\u64cd\u4f5c\u304c\u82e6\u624b\u306a\u65b9\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u4f7f\u3048\u308b\u7121\u6599\u30c4\u30fc\u30eb\u304c\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>MxToolbox\uff1a<\/strong>\u4e16\u754c\u7684\u306b\u6709\u540d\u306aDNS\u30c1\u30a7\u30c3\u30af\u30c4\u30fc\u30eb\u3002\u300cDMARC Lookup\u300d\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>Google Admin Toolbox Check MX\uff1a<\/strong>Google\u304c\u63d0\u4f9b\u3057\u3066\u3044\u308b\u30c1\u30a7\u30c3\u30af\u30c4\u30fc\u30eb\u3002\u300cDMARC\u300d\u306e\u9805\u76ee\u3067\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u5834\u5408\u306f\u3001\u30ab\u30f3\u30de\uff08,\uff09\u3068\u30bb\u30df\u30b3\u30ed\u30f3\uff08;\uff09\u306e\u9593\u9055\u3044\u3084\u3001\u30b9\u30da\u30eb\u30df\u30b9\u3001\u5168\u89d2\u30b9\u30da\u30fc\u30b9\u306e\u6df7\u5165\u306a\u3069\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>DMARC\u30ec\u30dd\u30fc\u30c8\u306e\u5206\u6790<\/h2>\n<p>\u3053\u3053\u307e\u3067\u8aad\u3093\u3067\u300c\u8a2d\u5b9a\u306f\u610f\u5916\u3068\u7c21\u5358\u305d\u3046\u3060\u306a\u300d\u3068\u601d\u3063\u305f\u3042\u306a\u305f\u3002\u92ed\u3044\u3067\u3059\u3002\u8a2d\u5b9a\u81ea\u4f53\u306f\u7c21\u5358\u306a\u306e\u3067\u3059\u3002<br \/>\n\u3057\u304b\u3057\u3001DMARC\u5c0e\u5165\u306e\u672c\u5f53\u306e\u30cf\u30fc\u30c9\u30eb\u306f\u3001<strong>\u300c\u8a2d\u5b9a\u3057\u305f\u5f8c\u300d<\/strong>\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u6bce\u65e5\u5c4a\u304f\u5927\u91cf\u306eXML\u30ec\u30dd\u30fc\u30c8<\/h3>\n<p><code>rua<\/code> \u30bf\u30b0\u3067\u6307\u5b9a\u3057\u305f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u5b9b\u306b\u3001Google\u3084Microsoft\u304b\u3089\u6bce\u65e5 <strong>\u300cDMARC\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\u300d<\/strong> \u304c\u5c4a\u304d\u59cb\u3081\u307e\u3059\u3002\u3053\u306e\u30ec\u30dd\u30fc\u30c8\u306f <strong>XML\u5f62\u5f0f<\/strong> \u306e\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002\u4e2d\u8eab\u306f\u30bf\u30b0\u3068\u6570\u5b57\u306e\u7f85\u5217\u3067\u3001\u4eba\u9593\u304c\u30e1\u30e2\u5e33\u3067\u958b\u3044\u3066\u8aad\u3081\u308b\u3088\u3046\u306a\u4ee3\u7269\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre><code>&lt;record&gt;\r\n  &lt;row&gt;\r\n    &lt;source_ip&gt;203.0.113.1&lt;\/source_ip&gt;\r\n    &lt;count&gt;150&lt;\/count&gt;\r\n    &lt;policy_evaluated&gt;\r\n      &lt;disposition&gt;none&lt;\/disposition&gt;\r\n      &lt;dkim&gt;pass&lt;\/dkim&gt;\r\n      &lt;spf&gt;fail&lt;\/spf&gt;\r\n    &lt;\/policy_evaluated&gt;\r\n  &lt;\/row&gt;\r\n  ...<\/code><\/pre>\n<p>\u3053\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u304c\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u306e\u3042\u3063\u305fISP\u3054\u3068\u306b\u6bce\u65e5\u9001\u3089\u308c\u3066\u304d\u307e\u3059\u3002\u300c\u3069\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u306a\u305c\u8a8d\u8a3c\u5931\u6557\u3057\u305f\u306e\u304b\u300d\u300c\u3053\u308c\u306f\u81ea\u793e\u306e\u30b5\u30fc\u30d0\u30fc\u306a\u306e\u304b\u3001\u653b\u6483\u8005\u306a\u306e\u304b\u300d\u3092\u3001\u3053\u306eXML\u3092\u898b\u3066\u6bce\u65e5\u5224\u65ad\u3057\u7d9a\u3051\u308b\u306e\u306f\u3001\u5c02\u4efb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u3044\u306a\u3044\u9650\u308a\u4e0d\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u30bf\u30b0\u3060\u3089\u3051\u306e\u30c7\u30fc\u30bf\u3067\u3042\u308a\u3001\u4eba\u9593\u304c\u76ee\u8996\u3067\u300c\u3069\u308c\u304c\u653b\u6483\u30e1\u30fc\u30eb\u304b\u300d\u3092\u5224\u5225\u3059\u308b\u306e\u306f\u4e0d\u53ef\u80fd\u306b\u8fd1\u3044\u306e\u3067\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table border=\"1\" style=\"border-collapse: collapse;width: 100%;margin: 20px 0\">\n<thead>\n<tr style=\"background-color: #f2f2f2\">\n<th style=\"padding: 10px;border: 1px solid #ddd\">\u9805\u76ee<\/th>\n<th style=\"padding: 10px;border: 1px solid #ddd\">\u4eba\u9593\u304c\u8aad\u3080\u5834\u5408<\/th>\n<th style=\"padding: 10px;border: 1px solid #ddd\">\u89e3\u6790\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u5834\u5408<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;border: 1px solid #ddd\"><strong>\u5185\u5bb9<\/strong><\/td>\n<td style=\"padding: 10px;border: 1px solid #ddd\">\u6697\u53f7\u306e\u3088\u3046\u306aXML\u30b3\u30fc\u30c9<\/td>\n<td style=\"padding: 10px;border: 1px solid #ddd\">\u308f\u304b\u308a\u3084\u3059\u3044\u30b0\u30e9\u30d5\u3068\u5730\u56f3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;border: 1px solid #ddd\"><strong>\u5224\u5225<\/strong><\/td>\n<td style=\"padding: 10px;border: 1px solid #ddd\">IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u624b\u52d5\u3067\u8abf\u67fb<\/td>\n<td style=\"padding: 10px;border: 1px solid #ddd\">\u300cSalesforce\u300d\u300c\u81ea\u793e\u30b5\u30fc\u30d0\u30fc\u300d\u3068\u81ea\u52d5\u8b58\u5225<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;border: 1px solid #ddd\"><strong>\u624b\u9593<\/strong><\/td>\n<td style=\"padding: 10px;border: 1px solid #ddd\">\u6bce\u65e51\u6642\u9593\u4ee5\u4e0a\uff08\u82e6\u884c\uff09<\/td>\n<td style=\"padding: 10px;border: 1px solid #ddd\">5\u5206\u306e\u30c1\u30a7\u30c3\u30af\u3067\u5b8c\u4e86<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u591a\u304f\u306e\u4f01\u696d\u304c <code>p=none<\/code> \u306e\u307e\u307e\u653e\u7f6e\u3057\u3066\u3057\u307e\u3046\u539f\u56e0\u306f\u3001\u3053\u306e\u30ec\u30dd\u30fc\u30c8\u5206\u6790\u306e\u7169\u96d1\u3055\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4>\u300c\u7d50\u5c40\u3001\u3069\u3046\u3059\u308c\u3070\u3044\u3044\uff1f\u300d\u3068\u3044\u3046\u65b9\u3078<\/h4>\n<p>\u81ea\u793e\u3067\u3059\u3079\u3066\u306eXML\u30ec\u30dd\u30fc\u30c8\u3092\u89e3\u6790\u3059\u308b\u306e\u306f\u3001\u7802\u6f20\u306e\u4e2d\u304b\u3089\u7279\u5b9a\u306e\u7802\u7c92\u3092\u63a2\u3059\u3088\u3046\u306a\u4f5c\u696d\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u30012025\u5e74\u73fe\u5728\u306f<strong>\u300cDMARC\u5bfe\u5fdc\u3092\u6a19\u6e96\u3067\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u300d<\/strong>\u3078\u79fb\u884c\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u5074\u3067\u8a8d\u8a3c\u72b6\u6cc1\u3092\u4e00\u5143\u7ba1\u7406\u3059\u308b\u306e\u304c\u6700\u3082\u8ce2\u3044\u9078\u629e\u80a2\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u89e3\u6790\u30c4\u30fc\u30eb\u3084\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u4e0d\u53ef\u6b20<\/h3>\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3044\u305a\u308c\u304b\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>DMARC\u89e3\u6790\u30c4\u30fc\u30eb\uff08\u6709\u6599\uff09\u3092\u5165\u308c\u308b<\/strong>: Valimail\u306a\u3069\u306e\u5c02\u7528\u30c4\u30fc\u30eb\u3092\u4f7f\u3048\u3070\u3001XML\u3092\u30b0\u30e9\u30d5\u5316\u3057\u3066\u53ef\u8996\u5316\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u308c\u306a\u308a\u306e\u30e9\u30f3\u30cb\u30f3\u30b0\u30b3\u30b9\u30c8\u304c\u304b\u304b\u308a\u307e\u3059\u3002<\/li>\n<li><strong>DMARC\u5bfe\u5fdc\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u3046<\/strong>: \u30e1\u30fc\u30eb\u914d\u4fe1\u3092\u30b5\u30fc\u30d3\u30b9\u5074\u306b\u5bc4\u305b\u308b\u3053\u3068\u3067\u3001\u9762\u5012\u306a\u7ba1\u7406\u3092\u4efb\u305b\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/li>\n<\/ul>\n<h2>\u83cc\u306d\u3093\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b\u300cBIMI\u300d\u3068\u306f\uff1f<\/h2>\n<p>SPF\u3001DKIM\u3001\u305d\u3057\u3066DMARC\u306e\u8a2d\u5b9a\u306f\u3001\u30e1\u30fc\u30eb\u3092\u300c\u5c4a\u3051\u308b\u300d\u305f\u3081\u306e\u5b88\u308a\u306e\u65bd\u7b56\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u73fe\u4ee3\u306e\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u305d\u308c\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\u3067\u3059\u3002\u8a8d\u8a3c\u3092\u6700\u9ad8\u30ec\u30d9\u30eb\u307e\u3067\u5f37\u5316\u3057\u305f\u4f01\u696d\u3060\u3051\u304c\u624b\u306b\u3067\u304d\u308b\u300cBIMI\uff08Brand Indicators for Message Identification\uff09\u300d\u3053\u305d\u304c\u3001\u653b\u3081\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8c61\u5fb4\u3068\u306a\u308a\u307e\u3059 \u3002<\/p>\n<h3>BIMI\u3068\u306f\uff1f \u53d7\u4fe1\u30c8\u30ec\u30a4\u3067\u300c\u516c\u5f0f\u30ed\u30b4\u300d\u3092\u8868\u793a\u3059\u308b\u65b0\u898f\u683c<\/h3>\n<p>BIMI\u306f\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u516c\u5f0f\u30ed\u30b4\u3092\u53d7\u4fe1\u30c8\u30ec\u30a4\u306b\u8868\u793a\u3055\u305b\u308b\u65b0\u3057\u3044\u8a8d\u8a3c\u898f\u683c\u3067\u3059 \u3002\u5358\u306b\u30ed\u30b4\u304c\u51fa\u308b\u3060\u3051\u3067\u306a\u304f\u3001Gmail\u306a\u3069\u3067\u306f\u300c\u8a8d\u8a3c\u6e08\u307f\u300d\u3092\u793a*\u9752\u3044\u30c1\u30a7\u30c3\u30af\u30de\u30fc\u30af\uff08Verified\u30d0\u30c3\u30b8\uff09\u304c\u4ed8\u4e0e\u3055\u308c\u307e\u3059 \u3002BIMI\u5c0e\u5165\u306e\u524d\u63d0\u6761\u4ef6\uff08\u6280\u8853\u7684\u30cf\u30fc\u30c9\u30eb\uff09\u306f\u4ee5\u4e0b\u306e\uff13\u3064\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>DMARC\u306e\u30dd\u30ea\u30b7\u30fc\u5f37\u5316\uff1a<\/strong>\u30dd\u30ea\u30b7\u30fc\u304c\u300cp=quarantine\u300d\u307e\u305f\u306f\u300cp=reject\u300d\u3067\u3042\u308a\u3001\u9069\u7528\u7387\uff08pct\uff09\u304c100%\u3067\u3042\u308b\u3053\u3068 \u3002<\/li>\n<li><strong>\u8a3c\u660e\u66f8\uff08VMC\/CMC\uff09\u306e\u53d6\u5f97\uff1a<\/strong>\u7b2c\u4e09\u8005\u6a5f\u95a2\u306b\u3088\u308b\u30ed\u30b4\u306e\u6240\u6709\u6a29\u8a3c\u660e\u304c\u5fc5\u8981\u3067\u3059 \u3002<\/li>\n<li><strong>SVG\u30ed\u30b4\u306e\u7528\u610f\uff1a<\/strong>\u6280\u8853\u4ed5\u69d8\u306b\u6e96\u62e0\u3057\u305f\u300cSVG Tiny PS\u5f62\u5f0f\u300d\u306e\u30ed\u30b4\u30d5\u30a1\u30a4\u30eb\u304c\u5fc5\u8981\u3067\u3059 \u3002<\/div><\/li>\n<\/ul>\n<h3>\u306a\u305c\u4eca\u3001BIMI\u304c\u5fc5\u8981\u306a\u306e\u304b<\/h3>\n<p>BIMI\u306f\u5358\u306a\u308b\u98fe\u308a\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30d6\u30e9\u30f3\u30c9\u4fdd\u8b77\u3068\u5229\u76ca\u76f4\u7d50\u306e\u300c\u8907\u5408\u52b9\u679c\u300d\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306e\u5bfe\u7b56\u3092\u3057\u3064\u3064\u3001\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306e\u52b9\u679c\u3092\u5f15\u304d\u4e0a\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table>\n<tbody>\n<tr>\n<td><b>\u52b9\u679c\u306e\u5206\u985e<\/b><\/td>\n<td><b>\u5177\u4f53\u7684\u306a\u30d9\u30cd\u30d5\u30a3\u30c3\u30c8<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>\u4fe1\u983c\u6027\u306e\u53ef\u8996\u5316<\/b><\/td>\n<td><span style=\"font-weight: 400\">\u53d7\u4fe1\u8005\u306f\u958b\u5c01\u524d\u306b\u300c\u306a\u308a\u3059\u307e\u3057\u3067\u306f\u306a\u3044\u300d\u3068\u76f4\u611f\u7684\u306b\u5224\u65ad\u53ef\u80fd \u3002<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>\u958b\u5c01\u7387\u306e\u5411\u4e0a<\/b><\/td>\n<td><span style=\"font-weight: 400\">\u8abf\u67fb\u3067\u306f\u3001BIMI\u5c0e\u5165\u306b\u3088\u308a<\/span><b>\u30e1\u30fc\u30eb\u958b\u5c01\u7387\u304c\u6700\u592739%\u5411\u4e0a<\/b><span style=\"font-weight: 400\">\u3057\u305f\u4f8b\u3082\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059 \u3002<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>\u5230\u9054\u7387\u306e\u6700\u9069\u5316<\/b><\/td>\n<td><span style=\"font-weight: 400\">\u9ad8\u5ea6\u306a\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u7d4c\u308b\u305f\u3081\u3001\u4e3b\u8981\u30d7\u30ed\u30d0\u30a4\u30c0\u306e\u30d5\u30a3\u30eb\u30bf\u3092\u901a\u904e\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059 \u3002<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>\u7af6\u5408\u3068\u306e\u5dee\u5225\u5316<\/b><\/td>\n<td><span style=\"font-weight: 400\">\u56fd\u5185\u3067\u306e\u666e\u53ca\u306f\u9014\u4e0a\u3067\u3042\u308a\u3001\u65e9\u671f\u5c0e\u5165\u306b\u3088\u308a\u53d7\u4fe1\u30c8\u30ec\u30a4\u5185\u3067\u5727\u5012\u7684\u306a\u5b58\u5728\u611f\u3092\u653e\u3066\u307e\u3059 \u3002<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5f37\u5316\u304c\u30d6\u30e9\u30f3\u30c9\u8cc7\u7523\u3092\u69cb\u7bc9\u3059\u308b<\/h3>\n<p>DMARC\u3092\u300cp=none\uff08\u76e3\u8996\u306e\u307f\uff09\u300d\u3067\u653e\u7f6e\u3059\u308b\u3053\u3068\u306f\u3001BIMI\u3068\u3044\u3046\u5f37\u529b\u306a\u6b66\u5668\u3092\u653e\u68c4\u3057\u3066\u3044\u308b\u306e\u3068\u540c\u3058\u3067\u3059 \u3002\u8a8d\u8a3c\u306e\u6574\u5099\u3092\u300c\u30b3\u30b9\u30c8\u300d\u3067\u306f\u306a\u304f\u300c\u30d6\u30e9\u30f3\u30c9\u8cc7\u7523\u3078\u306e\u6295\u8cc7\u300d\u3068\u6349\u3048\u76f4\u3057\u3001DMARC\u306e\u53b3\u683c\u5316\u304b\u3089BIMI\u5b9f\u88c5\u3078\u3068\u9032\u3080\u3053\u3068\u3067\u3001\u8cb4\u793e\u306e\u30e1\u30fc\u30eb\u306f\u4fe1\u983c\u3092\u5927\u304d\u304f\u5f37\u3081\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001DMARC\u30dd\u30ea\u30b7\u30fc\u306e\u5f15\u304d\u4e0a\u3052\u3001BIMI\u306e\u5c0e\u5165\u3084VMC\u306e\u53d6\u5f97\u306a\u3069\u306f\u5c02\u9580\u7684\u306a\u77e5\u8b58\u304c\u5fc5\u8981\u3067\u81ea\u793e\u3060\u3051\u3067\u9032\u3081\u308b\u306e\u306f\u624b\u9593\u3068\u6642\u9593\u304c\u5fc5\u8981\u4ee5\u4e0a\u306b\u304b\u304b\u308b\u5834\u5408\u304c\u591a\u3044\u3067\u3059\u3002\u307e\u305a\u306f\u5f0a\u793e\u306eBIMI\u30a8\u30ad\u30b9\u30d1\u30fc\u30c8\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u30fb\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u306e\u3054\u76f8\u8ac7\u3082\u53ef\u80fd\u3067\u3059\u306e\u3067\u304a\u6c17\u8efd\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002BIMI\u306b\u95a2\u3059\u308b\u4e9b\u7d30\u306a\u7591\u554f\u304b\u3089\u5c0e\u5165\u3078\u306e\u4e0d\u5b89\u307e\u3067\u89e3\u6d88\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n<p><strong><a href=\"https:\/\/blastmail.jp\/blog\/download\/bimi-doc\" target=\"_blank\" rel=\"noopener\">&gt;&gt;BIMI\u5b8c\u5168\u30ac\u30a4\u30c9\u3092\u7121\u6599\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b<\/a><\/strong><\/p>\n<p><strong><a href=\"https:\/\/blastmail.jp\/blog\/download\/bimi\" target=\"_blank\" rel=\"noopener\">&gt;&gt;BIMI\u5c0e\u5165\u306b\u3064\u3044\u3066\u7121\u6599\u3067\u76f8\u8ac7\u30fb\u554f\u3044\u5408\u308f\u305b\u3059\u308b<\/a><\/strong><\/p>\n<h2>DMARC\u904b\u7528\u3068\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u95a2\u4fc2<\/h2>\n<p>DMARC\u3092\u5c0e\u5165\u3059\u308b\u969b\u3001\u3059\u3079\u3066\u3092\u81ea\u793e\u30b5\u30fc\u30d0\u30fc\uff08\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\uff09\u3067\u5b8c\u7d50\u3055\u305b\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u6280\u8853\u7684\u306a\u30cf\u30fc\u30c9\u30eb\u3068\u300c\u5230\u9054\u7387\u306e\u7dad\u6301\u300d\u3068\u3044\u3046\u898b\u3048\u306a\u3044\u30b3\u30b9\u30c8\u306b\u76f4\u9762\u3057\u307e\u3059\u3002\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u5229\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u4ee5\u4e0b\u304c\u3042\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u5229\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8<\/h3>\n<p>DMARC\u3092\u81ea\u524d\u3067\u5b8c\u74a7\u306b\u904b\u7528\u3059\u308b\u306e\u306f\u3001\u5b9f\u306f\u304b\u306a\u308a\u30cf\u30fc\u30c9\u30eb\u304c\u9ad8\u3044\u4f5c\u696d\u3067\u3059\u3002\u7279\u306b\u300cSPF\/DKIM\u306e\u8a2d\u5b9a\u30df\u30b9\u300d\u3084\u300c\u9001\u4fe1\u5143\u30c9\u30e1\u30a4\u30f3\u306e\u4e0d\u4e00\u81f4\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff09\u300d\u3092\u81ea\u529b\u3067\u3059\u3079\u3066\u7ba1\u7406\u3057\u7d9a\u3051\u308b\u306e\u306f\u3001\u6280\u8853\u7684\u306b\u3082\u6642\u9593\u7684\u306b\u3082\u5927\u304d\u306a\u30b3\u30b9\u30c8\u304c\u304b\u3055\u307f\u307e\u3059\u3002\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001\u3053\u3046\u3057\u305f\u8907\u96d1\u306a\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u81ea\u52d5\u5316\u3057\u3001\u5b89\u5168\u304b\u3064\u78ba\u5b9f\u306b\u30e1\u30fc\u30eb\u3092\u5c4a\u3051\u308b\u305f\u3081\u306e\u571f\u53f0\u3092\u30b9\u30e0\u30fc\u30ba\u306b\u6574\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u8a8d\u8a3c\u8a2d\u5b9a\u306e\u7c21\u7565\u5316\u3068\u6574\u5408\u6027\u306e\u78ba\u4fdd\uff1a<\/strong>\u8907\u96d1\u306aDKIM\u9375\u306e\u751f\u6210\u3084DNS\u767b\u9332\u3092\u30ac\u30a4\u30c9\u4ed8\u304d\u3067\u884c\u3048\u308b\u305f\u3081\u3001DMARC\u5408\u683c\u306b\u4e0d\u53ef\u6b20\u306a\u300c\u30c9\u30e1\u30a4\u30f3\u306e\u4e00\u81f4\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff09\u300d\u3092\u78ba\u5b9f\u306b\u69cb\u6210\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u9001\u4fe1\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5c02\u9580\u7684\u306a\u4fdd\u8b77\uff1a<\/strong>\u5c02\u9580\u30c1\u30fc\u30e0\u304c\u5e38\u306b\u76e3\u8996\u30fb\u7ba1\u7406\u3057\u3066\u3044\u308b\u30af\u30ea\u30fc\u30f3\u306aIP\u30a2\u30c9\u30ec\u30b9\u7fa4\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u81ea\u793e\u30b5\u30fc\u30d0\u30fc\u904b\u7528\u3067\u9665\u308a\u304c\u3061\u306a\u30b9\u30d1\u30e0\u5224\u5b9a\u306e\u30ea\u30b9\u30af\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u6700\u65b0\u306e\u53d7\u4fe1\u5074\u8981\u4ef6\u3078\u306e\u8fc5\u901f\u306a\u5bfe\u5fdc\uff1a<\/strong>Gmail\u3084Yahoo!\u306a\u3069\u306e\u4e3b\u8981\u30d7\u30ed\u30d0\u30a4\u30c0\u304c\u6c42\u3081\u308b\u6700\u65b0\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u30eb\u30fc\u30eb\u306b\u5bfe\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u5074\u304c\u81ea\u52d5\u3067\u8ffd\u5f93\u3059\u308b\u305f\u3081\u3001\u904b\u7528\u62c5\u5f53\u8005\u306e\u5b66\u7fd2\u30b3\u30b9\u30c8\u3092\u5927\u5e45\u306b\u524a\u6e1b\u53ef\u80fd\u3067\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001DMARC\u904b\u7528\u3067\u6700\u3082\u907f\u3051\u305f\u3044\u306e\u306f\u300c\u8a2d\u5b9a\u30df\u30b9\u306b\u3088\u3063\u3066\u3001\u5c4a\u304f\u3079\u304d\u5927\u4e8b\u306a\u30e1\u30fc\u30eb\u304c\u62d2\u5426\u3055\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u300d\u3067\u3059\u3002\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u306f\u3001\u5358\u306a\u308b\u52b9\u7387\u5316\u3067\u306f\u306a\u304f\u3001\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u3068\u3044\u3046\u300c\u4f01\u696d\u306e\u4fe1\u983c\u300d\u3092\u62c5\u4fdd\u3059\u308b\u305f\u3081\u306e\u8ce2\u3044\u6295\u8cc7\u3068\u3044\u3048\u307e\u3059\u3002\u7279\u306b\u3001\u89e3\u6790\u304c\u56f0\u96e3\u306aXML\u30ec\u30dd\u30fc\u30c8\u306e\u8996\u899a\u5316\u307e\u3067\u30ab\u30d0\u30fc\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u9078\u3079\u3070\u3001\u904b\u7528\u8ca0\u8377\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3064\u3064\u3001\u5b89\u5168\u306a\u914d\u4fe1\u74b0\u5883\u3092\u7dad\u6301\u3057\u7d9a\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n<h3>\u304a\u3059\u3059\u3081\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300c\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u300d<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2024\/07\/blastmail-top.jpg\" alt=\"\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u306e\u30ad\u30e3\u30c3\u30c1\u753b\u50cf\" width=\"1200\" height=\"630\" class=\"alignnone size-full wp-image-15955\" \/><\/p>\n<p>\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\uff08blastmail\uff09\u306f\u300115\u5e74\u9023\u7d9a\u3067\u5c0e\u5165\u793e\u6570\u30b7\u30a7\u30a2No.1\u3092\u7372\u5f97\u3057\u3066\u3044\u308b\u56fd\u5185\u6700\u5927\u7d1a\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u300227,000\u793e\u4ee5\u4e0a\u306e\u5c0e\u5165\u5b9f\u7e3e\u306b\u88cf\u6253\u3061\u3055\u308c\u305f\u9ad8\u3044\u5230\u9054\u7387\u306b\u52a0\u3048\u3001\u5c02\u9580\u7684\u306a\u77e5\u8b58\u304c\u306a\u304f\u3066\u3082\u8ff7\u308f\u305a\u64cd\u4f5c\u3067\u304d\u308b\u300c\u7a76\u6975\u306e\u30b7\u30f3\u30d7\u30eb\u3055\u300d\u304c\u9ad8\u304f\u8a55\u4fa1\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u6700\u65b0\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3078\u306e\u5bfe\u5fdc<\/strong>: SPF\/DKIM\u8a2d\u5b9a\u304c\u6a19\u6e96\u5316\u3055\u308c\u3066\u304a\u308a\u3001DMARC\u5c0e\u5165\u306e\u524d\u63d0\u3068\u306a\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u30b9\u30e0\u30fc\u30ba\u306b\u6574\u3048\u3089\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u76f4\u611f\u7684\u306a\u52b9\u679c\u6e2c\u5b9a<\/strong>: \u958b\u5c01\u7387\u3084\u30af\u30ea\u30c3\u30af\u7387\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u5206\u6790\u3067\u304d\u3001DMARC\u5c0e\u5165\u306b\u3088\u308b\u5230\u9054\u7387\u3078\u306e\u5f71\u97ff\u3082\u5bb9\u6613\u306b\u628a\u63e1\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<li><strong>\u5b89\u5fc3\u306e\u30b5\u30dd\u30fc\u30c8\u4f53\u5236<\/strong>: DMARC\u306e\u8a2d\u5b9a\u3084\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3067\u8ff7\u3063\u305f\u969b\u3082\u3001\u96fb\u8a71\u3084\u30c1\u30e3\u30c3\u30c8\u3067\u5c02\u9580\u30b9\u30bf\u30c3\u30d5\u306b\u76f4\u63a5\u76f8\u8ac7\u3067\u304d\u308b\u74b0\u5883\u304c\u6574\u3063\u3066\u3044\u307e\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u521d\u3081\u3066\u30e1\u30eb\u30de\u30ac\u3092\u904b\u7528\u3059\u308b\u62c5\u5f53\u8005\u304b\u3089\u3001\u5927\u898f\u6a21\u914d\u4fe1\u3092\u884c\u3046\u4f01\u696d\u307e\u3067\u5e45\u5e83\u304f\u9078\u3070\u308c\u3066\u3044\u307e\u3059\u3002\u3088\u308a\u78ba\u5b9f\u3067\u52b9\u7387\u7684\u306a\u30e1\u30fc\u30eb\u904b\u7528\u3092\u76ee\u6307\u3059\u306a\u3089\u3001\u307e\u305a\u306f\u7121\u6599\u30c8\u30e9\u30a4\u30a2\u30eb\u3067\u305d\u306e\u4f7f\u3044\u5fc3\u5730\u3092\u4f53\u611f\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u516c\u5f0f\u30b5\u30a4\u30c8\uff1a<a href=\"https:\/\/blastmail.jp\/\">\u30b7\u30a7\u30a21\u4f4d\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300c\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u300d<\/a><\/p>\n<h3>\u304a\u3059\u3059\u3081\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300cblastengine\u300d<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2025\/10\/blastengine.jpg\" alt=\"blastengine\u306e\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u753b\u50cf\" width=\"1303\" height=\"590\" class=\"alignnone size-full wp-image-19575\" \/><\/p>\n<p>blastengine\uff08\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\uff09\u306f\u3001API\u9023\u643a\u3084SMTP\u30ea\u30ec\u30fc\u3092\u7528\u3044\u3066\u304a\u624b\u6301\u3061\u306e\u30b7\u30b9\u30c6\u30e0\u3068\u7c21\u5358\u306b\u9023\u643a\u3067\u304d\u308b\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u5411\u3051\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3067\u3059\u3002\u904b\u7528\u30fb\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306f\u3059\u3079\u3066\u30b5\u30fc\u30d3\u30b9\u5074\u304c\u884c\u3046\u305f\u3081\u3001\u5e38\u306b\u9ad8\u3044IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7dad\u6301\u3067\u304d\u3001\u958b\u767a\u8005\u3092\u30b5\u30fc\u30d0\u30fc\u7ba1\u7406\u306e\u8ca0\u62c5\u304b\u3089\u89e3\u653e\u3057\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u67d4\u8edf\u306a\u30b7\u30b9\u30c6\u30e0\u9023\u643a<\/strong>: \u958b\u767a\u4e2d\u306e\u30a6\u30a7\u30d6\u30b5\u30fc\u30d3\u30b9\u3084\u57fa\u5e79\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u3068\u9023\u643a\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u306e\u901a\u77e5\u30e1\u30fc\u30eb\u306a\u3069\u306b\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u78ba\u5b9f\u306a\u5230\u9054\u30ed\u30b0\u7ba1\u7406<\/strong>: \u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u914d\u4fe1\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u8a73\u7d30\u306b\u78ba\u8a8d\u3067\u304d\u3001\u8a8d\u8a3c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u969b\u306e\u89e3\u6790\u3082\u30b9\u30e0\u30fc\u30ba\u3067\u3059\u3002<\/li>\n<li><strong>DMARC\u5c0e\u5165\u306e\u6280\u8853\u30b5\u30dd\u30fc\u30c8<\/strong>: BIMI\u3084VMC\u3082\u542b\u3081\u305f\u9ad8\u5ea6\u306a\u8a8d\u8a3c\u6280\u8853\u306e\u5c0e\u5165\u306b\u3064\u3044\u3066\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u76ee\u7dda\u306e\u624b\u539a\u3044\u30b5\u30dd\u30fc\u30c8\u304c\u53d7\u3051\u3089\u308c\u307e\u3059\u3002<\/div><\/li>\n<\/ul>\n<p>\u521d\u671f\u8cbb\u7528\u7121\u6599\u3067\u5373\u5ea7\u306b\u5c0e\u5165\u3067\u304d\u308b\u305f\u3081\u3001\u30b7\u30b9\u30c6\u30e0\u9023\u643a\u306b\u3088\u308b\u78ba\u5b9f\u306a\u30e1\u30fc\u30eb\u914d\u4fe1\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u305f\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u6700\u9069\u3067\u3059\u3002\u65e5\u672c\u88fd\u306e\u30b5\u30fc\u30d3\u30b9\u306a\u3089\u3067\u306f\u306e\u4e01\u5be7\u306a\u30c6\u30af\u30cb\u30ab\u30eb\u30b5\u30dd\u30fc\u30c8\u3082\u3001\u591a\u304f\u306e\u958b\u767a\u30c1\u30fc\u30e0\u306b\u652f\u6301\u3055\u308c\u3066\u3044\u308b\u7406\u7531\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n<p>\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\u516c\u5f0f\u30b5\u30a4\u30c8\uff1a<a href=\"https:\/\/blastengine.jp\/\">https:\/\/blastengine.jp\/<\/a><\/p>\n<div class=\"blog-faq\"><h2 class=\"blog-faq__title\">FAQ<\/h2><dl class=\"blog-faq__list\">\n<dt class=\"blog-faq__question\">Q\uff1aDMARC\u8a2d\u5b9a\u306f\u5fc5\u305a\u884c\u308f\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u306f\u3044\u30012024\u5e742\u6708\u4ee5\u964d\u3001Gmail\u3084Yahoo!\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u3088\u308a\u3001<strong>\u5927\u91cf\u9001\u4fe1\u8005\uff081\u65e55,000\u901a\u4ee5\u4e0a\uff09\u306b\u306fDMARC\u306e\u8a2d\u5b9a\u304c\u7fa9\u52d9\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/strong>\u672a\u8a2d\u5b9a\u306e\u5834\u5408\u3001\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u304f\u306a\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aDMARC\u30ec\u30b3\u30fc\u30c9\u306e\u30db\u30b9\u30c8\u540d\u306f\u4f55\u3068\u8a2d\u5b9a\u3059\u308c\u3070\u826f\u3044\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u57fa\u672c\u7684\u306b\u306f <strong>_dmarc<\/strong> \u3068\u8a2d\u5b9a\u3057\u307e\u3059\u3002DNS\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u306f _dmarc.\u81ea\u793e\u30c9\u30e1\u30a4\u30f3 \u3068\u5165\u529b\u3059\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u591a\u304f\u306f _dmarc \u306e\u307f\u3067\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1a\u5c0e\u5165\u521d\u671f\u306b\u6700\u9069\u306a\u30dd\u30ea\u30b7\u30fc\u8a2d\u5b9a\uff08p=\uff09\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u6700\u521d\u306f\u5fc5\u305a <strong>p=none\uff08\u76e3\u8996\u30e2\u30fc\u30c9\uff09<\/strong> \u304b\u3089\u59cb\u3081\u3066\u304f\u3060\u3055\u3044\u3002\u3044\u304d\u306a\u308a reject\uff08\u62d2\u5426\uff09\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u8a8d\u8a3c\u8a2d\u5b9a\u304c\u6f0f\u308c\u3066\u3044\u308b\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u307e\u3067\u5c4a\u304b\u306a\u304f\u306a\u308b\u6050\u308c\u304c\u3042\u308b\u305f\u3081\u3067\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1a\u300c\u30c9\u30e1\u30a4\u30f3\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u300d\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u30e1\u30fc\u30eb\u306eFrom\u30a2\u30c9\u30ec\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u3001SPF\/DKIM\u3067\u8a8d\u8a3c\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u306e\u72b6\u614b\u3092\u6307\u3057\u307e\u3059\u3002<strong>DMARC\u3092\u30d1\u30b9\u3059\u308b\u306b\u306f\u3001\u3053\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/strong><\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aXML\u5f62\u5f0f\u306eDMARC\u30ec\u30dd\u30fc\u30c8\u3092\u89e3\u6790\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u306f\u3044\u3001\u751f\u30c7\u30fc\u30bf\u306f\u30bf\u30b0\u3060\u3089\u3051\u3067\u4eba\u9593\u304c\u8aad\u307f\u89e3\u304f\u306e\u306f\u56f0\u96e3\u3067\u3059\u3002<strong>\u52b9\u7387\u7684\u306a\u904b\u7528\u306e\u305f\u3081\u306b\u3001\u89e3\u6790\u30c4\u30fc\u30eb\u3084DMARC\u5bfe\u5fdc\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u6d3b\u7528\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/strong><\/dd>\n<\/dl><\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>DMARC\u8a2d\u5b9a\u306f\u3001\u3082\u306f\u3084\u300c\u4efb\u610f\u300d\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u306f\u306a\u304f\u3001\u30e1\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u30d3\u30b8\u30cd\u30b9\u3092\u884c\u3046\u4f01\u696d\u306e\u300c\u7fa9\u52d9\u300d\u306b\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3042\u306a\u305f\u306e\u30e1\u30fc\u30eb\u304c\u9867\u5ba2\u306b\u5c4a\u304f\u304b\u3069\u3046\u304b\u3001\u305d\u3057\u3066\u300c\u306a\u308a\u3059\u307e\u3057\u300d\u306b\u3088\u3063\u3066\u30d6\u30e9\u30f3\u30c9\u304c\u50b7\u3064\u304f\u304b\u3069\u3046\u304b\u306f\u3001\u3053\u306e1\u884c\u306e\u30ec\u30b3\u30fc\u30c9\u8a2d\u5b9a\u306b\u304b\u304b\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u624b\u9806\u3092\u304a\u3055\u3089\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<ol>\n<li><strong>\u73fe\u72b6\u78ba\u8a8d<\/strong>: \u65e2\u5b58\u306eSPF\/DKIM\u3092\u78ba\u8a8d\u3002<\/li>\n<li><strong>DNS\u8a2d\u5b9a<\/strong>: <code>p=none<\/code> \u3067DMARC\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3002<\/li>\n<li><strong>\u76e3\u8996\u30fb\u5206\u6790<\/strong>: \u30ec\u30dd\u30fc\u30c8\u3092\u898b\u3066\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u901a\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3002<\/li>\n<li><strong>\u5f37\u5316<\/strong>: \u6e96\u5099\u304c\u3067\u304d\u305f\u3089 <code>p=quarantine<\/code> \u2192 <code>p=reject<\/code> \u3078\u3068\u6bb5\u968e\u7684\u306b\u5f37\u5316\u3057\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ec\u30d9\u30eb\u3092\u4e0a\u3052\u308b\u3002<\/li>\n<\/ol>\n<p>\u30e1\u30fc\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306f\u4eca\u5f8c\u3082\u5f37\u5316\u3055\u308c\u7d9a\u3051\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u300cDMARC\u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3068\u30e1\u30fc\u30eb\u306f\u5c4a\u304b\u306a\u3044\u300d\u3068\u3044\u3046\u72b6\u6cc1\u3082\u60f3\u50cf\u3067\u304d\u308b\u72b6\u614b\u3067\u3059\u3002\u4eca\u304b\u3089\u3057\u3063\u304b\u308a\u3068\u5bfe\u7b56\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6027\u306e\u9ad8\u3044\u30e1\u30fc\u30eb\u3092\u30e6\u30fc\u30b6\u30fc\u306b\u78ba\u5b9f\u306b\u5c4a\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><a href=\"https:\/\/blastmail.jp\/blog\/download\/bimi-doc\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2022\/01\/BIMI\u6f5c\u5728\u5c64\u5411\u30511280x628.png\" alt=\"\u306a\u308a\u3059\u307e\u3057\u5bfe\u7b56\u30d0\u30ca\u30fc\" width=\"1280\" height=\"628\" class=\"alignnone wp-image-21307 size-full\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u300cDMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u306e\u8a2d\u5b9a\u306f\u304a\u6e08\u307f\u3067\u3059\u304b\uff1f\u300d\u3082\u3057\u3001\u3053\u306e\u8cea\u554f\u306b\u5373\u7b54\u3067\u304d\u306a\u3044\u3001\u3042\u308b\u3044\u306f\u300cSPF\u3068&#8230;<\/p>\n","protected":false},"author":8,"featured_media":21324,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-21318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spam"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/posts\/21318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/comments?post=21318"}],"version-history":[{"count":6,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/posts\/21318\/revisions"}],"predecessor-version":[{"id":21328,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/posts\/21318\/revisions\/21328"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/media\/21324"}],"wp:attachment":[{"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/media?parent=21318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/categories?post=21318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blastmail.jp\/blog\/wp-json\/wp\/v2\/tags?post=21318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}