{"id":4312,"date":"2020-07-28T09:45:55","date_gmt":"2020-07-28T00:45:55","guid":{"rendered":"https:\/\/blastmail.jp\/blog\/?p=4312"},"modified":"2026-07-31T15:16:42","modified_gmt":"2026-07-31T06:16:42","slug":"dmarc-mail","status":"publish","type":"post","link":"https:\/\/blastmail.jp\/blog\/spam\/dmarc-mail","title":{"rendered":"DMARC\u3068\u306f\uff1f\u4ed5\u7d44\u307f\u30fb\u8a2d\u5b9a\u65b9\u6cd5\u30fbBIMI\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u6700\u65b0\u3011"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2020\/07\/DMARC.png\" alt=\"DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09\u3068\u306f\uff1f \u4ed5\u7d44\u307f\u30fb\u8a2d\u5b9a\u65b9\u6cd5\u30fbBIMI\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\" width=\"1738\" height=\"905\" class=\"alignnone size-full wp-image-22444\" \/><\/p>\n<p>\u30e1\u30fc\u30eb\u914d\u4fe1\u306e\u73fe\u5834\u3067\u300cDMARC\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u76ee\u306b\u3059\u308b\u6a5f\u4f1a\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002SPF\u3084DKIM\u3068\u4e26\u3079\u3066\u8a9e\u3089\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3082\u306e\u306e\u3001\u3053\u306e3\u3064\u304c\u3069\u3046\u9055\u3044\u3001DMARC\u304c\u5b9f\u969b\u306b\u4f55\u3092\u3057\u3066\u3044\u308b\u306e\u304b\u306f\u3001\u540d\u524d\u3060\u3051\u3067\u306f\u63b4\u307f\u306b\u304f\u3044\u6280\u8853\u3067\u3059\u3002<\/p>\n<p>DMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u3068\u306f\u3001<strong>SPF\u3068DKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u3082\u3068\u306b\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3069\u3046\u6271\u3046\u304b\u3092\u9001\u4fe1\u5074\u304c\u3042\u3089\u304b\u3058\u3081\u6307\u5b9a\u3067\u304d\u308b\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853<\/strong>\u3067\u3059\u3002\u300c\u81ea\u793e\u3092\u304b\u305f\u308b\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306f\u53d7\u3051\u53d6\u3089\u306a\u3044\u3067\u307b\u3057\u3044\u300d\u3068\u3044\u3046\u65b9\u91dd\u3092\u3001\u9001\u4fe1\u5074\u304b\u3089\u53d7\u4fe1\u5074\u306b\u4f1d\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001DMARC\u306e\u5b9a\u7fa9\u3068\u4ed5\u7d44\u307f\u3092\u8ef8\u306b\u3001\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u3001\u8a2d\u5b9a\u30fb\u78ba\u8a8d\u65b9\u6cd5\u3001\u30ec\u30dd\u30fc\u30c8\u306e\u6d3b\u7528\u3001\u5c0e\u5165\u6642\u306e\u6ce8\u610f\u70b9\u307e\u3067\u3092\u3001\u56f3\u3068\u3042\u308f\u305b\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/blastmail.jp\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2023\/01\/bm_banner_big_mailsystem_1200x628.png\" alt=\"blastmail\u306e\u30d0\u30ca\u30fc\" width=\"1200\" height=\"629\" class=\"alignnone wp-image-19829 size-full\" \/><\/a><\/p>\n<h2>DMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u3068\u306f<\/h2>\n<p>DMARC\u306e\u6b63\u5f0f\u540d\u79f0\u306f<strong>\u300cDomain-based Message Authentication, Reporting, and Conformance\u300d<\/strong>\u3067\u3059\u3002SPF\u3084DKIM\u306b\u3088\u308b\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u6271\u3044\u3092\u9001\u4fe1\u5074\u304c\u6307\u5b9a\u3067\u304d\u3001\u3042\u308f\u305b\u3066\u8a8d\u8a3c\u7d50\u679c\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308c\u308b\u70b9\u304c\u3001\u4ed6\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u3068\u306e\u9055\u3044\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>DMARC\u306f\u5358\u4f53\u3067\u52d5\u4f5c\u3059\u308b\u6280\u8853\u3067\u306f\u306a\u304f\u3001\u5148\u884c\u3059\u308b2\u3064\u306e\u8a8d\u8a3c\u6280\u8853\u300cSPF\u300d\u3068\u300cDKIM\u300d\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u5229\u7528\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001SPF\u307e\u305f\u306fDKIM\u306e\u8a2d\u5b9a\u304c\u524d\u63d0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>SPF\u30fbDKIM\u3068\u306e\u9055\u3044<\/h3>\n<p>SPF\u3068DKIM\u306f\u3001\u3044\u305a\u308c\u3082\u300c\u305d\u306e\u30e1\u30fc\u30eb\u304c\u6b63\u898f\u306e\u9001\u4fe1\u5143\u304b\u3089\u9001\u3089\u308c\u305f\u3082\u306e\u304b\u300d\u3092\u691c\u8a3c\u3059\u308b\u6280\u8853\u3067\u3059\u3002<\/p>\n<p><strong>SPF\uff08Sender Policy Framework\uff09<\/strong>\u306f\u3001\u300c\u3053\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u306f\u3053\u306e\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u4fe1\u3059\u308b\u300d\u3068\u3044\u3046\u60c5\u5831\u3092DNS\u306b\u516c\u958b\u3057\u3001\u53d7\u4fe1\u5074\u304c<strong>\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9<\/strong>\u306e\u6b63\u5f53\u6027\u3092\u691c\u8a3c\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<strong>DKIM\uff08DomainKeys Identified Mail\uff09<\/strong>\u306f\u3001\u30e1\u30fc\u30eb\u306b<strong>\u96fb\u5b50\u7f72\u540d<\/strong>\u3092\u4ed8\u4e0e\u3057\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u306e\u6b63\u5f53\u6027\u3068\u30e1\u30fc\u30eb\u5185\u5bb9\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002<\/p>\n<p>3\u3064\u306e\u6280\u8853\u306e\u9055\u3044\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table>\n<tbody>\n<tr>\n<th>\u6280\u8853<\/th>\n<th>\u8a8d\u8a3c\u306e\u65b9\u6cd5<\/th>\n<th>\u3067\u304d\u308b\u3053\u3068<\/th>\n<th>\u3067\u304d\u306a\u3044\u3053\u3068<\/th>\n<\/tr>\n<tr>\n<td>SPF<\/td>\n<td>\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306e\u691c\u8a3c<\/td>\n<td>\u8a31\u53ef\u3055\u308c\u305f\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u9001\u4fe1\u304b\u3092\u78ba\u8a8d<\/td>\n<td>\u30e1\u30fc\u30eb\u5185\u5bb9\u306e\u6539\u3056\u3093\u691c\u77e5\u30fb\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u6271\u3044\u306e\u6307\u5b9a<\/td>\n<\/tr>\n<tr>\n<td>DKIM<\/td>\n<td>\u96fb\u5b50\u7f72\u540d\u306e\u691c\u8a3c<\/td>\n<td>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u306e\u6b63\u5f53\u6027\u3068\u5185\u5bb9\u306e\u6539\u3056\u3093\u6709\u7121\u3092\u78ba\u8a8d<\/td>\n<td>\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u6271\u3044\u306e\u6307\u5b9a\u30fb\u30ec\u30dd\u30fc\u30c8\u53d7\u4fe1<\/td>\n<\/tr>\n<tr>\n<td>DMARC<\/td>\n<td>SPF\u30fbDKIM\u306e\u7d50\u679c\u3068\u30d8\u30c3\u30c0\u30fcFrom\u306e\u7167\u5408<\/td>\n<td>\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u30dd\u30ea\u30b7\u30fc\u6307\u5b9a\u30fb\u30ec\u30dd\u30fc\u30c8\u53d7\u4fe1<\/td>\n<td>\u5358\u4f53\u3067\u306f\u6a5f\u80fd\u3057\u306a\u3044\uff08SPF\u307e\u305f\u306fDKIM\u304c\u524d\u63d0\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>SPF\u30fbDKIM\u305d\u308c\u305e\u308c\u306e\u4ed5\u7d44\u307f\u3084\u8a2d\u5b9a\u65b9\u6cd5\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n  <div class=\"blogcard\">\n  <a href=\"\/blog\/spam\/spf-record\">\n   <div class=\"blogcard_thumbnail\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2020\/05\/SPF_banner.png\" alt=\"SPF\uff08Sender Policy Framework\uff09\u3068\u306f\uff1f\uff5c\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u30fbSPF\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\" width=\"90\" height=\"47\" \/><\/div>\n   <div class=\"blogcard_content\">\n    <div class=\"blogcard_title\">SPF\uff08Sender Policy Framework\uff09\u3068\u306f\uff1f\uff5c\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u30fbSPF\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/div>\n    <div class=\"blogcard_excerpt\">SPF\u3068\u306f\u3001\u300c\u3053\u306e\u30e1\u30fc\u30eb\u306f\u6b63\u3057\u3044\u9001\u4fe1\u5143\u304b\u3089\u9001\u3089\u308c\u3066\u3044\u307e\u3059\u300d\u3068\u53d7\u4fe1\u5074\u306b\u8a3c\u660e\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u306e\u3053\u3068\u3067\u3059\u3002\u300cSender Policy Framewo\u2026<\/div>\n   <\/div>\n   <div class=\"clear\"><\/div>\n  <\/a>\n  <\/div>\n\n  <div class=\"blogcard\">\n  <a href=\"\/blog\/mail-delivery\/dkim\">\n   <div class=\"blogcard_thumbnail\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2022\/09\/DKIM_banner.png\" alt=\"DKIM\uff08\u30c7\u30a3\u30fc\u30ad\u30e0\uff09\u3068\u306f\uff1f\uff5c\u4ed5\u7d44\u307f\u304b\u3089\u8a2d\u5b9a\u65b9\u6cd5\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\uff01\" width=\"90\" height=\"47\" \/><\/div>\n   <div class=\"blogcard_content\">\n    <div class=\"blogcard_title\">DKIM\uff08\u30c7\u30a3\u30fc\u30ad\u30e0\uff09\u3068\u306f\uff1f\uff5c\u4ed5\u7d44\u307f\u304b\u3089\u8a2d\u5b9a\u65b9\u6cd5\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\uff01<\/div>\n    <div class=\"blogcard_excerpt\">DKIM\u3063\u3066\u3069\u3093\u306a\u4ed5\u7d44\u307f\uff1fGmail\u3084Outlook\u306b\u306f\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u306e\uff1f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u306e1\u3064\u3067\u3042\u308bDKIM\u306e\u4ed5\u7d44\u307f\u3084\u5f79\u5272\u306b\u3064\u3044\u3066\u56f3\u89e3\u3057\u307e\u2026<\/div>\n   <\/div>\n   <div class=\"clear\"><\/div>\n  <\/a>\n  <\/div>\n<h3>SPF\u30fbDKIM\u3060\u3051\u3067\u306f\u9632\u3052\u306a\u3044\u306a\u308a\u3059\u307e\u3057<\/h3>\n<p>SPF\u3068DKIM\u306b\u306f\u3001\u5171\u901a\u3059\u308b2\u3064\u306e\u5f31\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>1\u3064\u76ee\u306f\u3001<strong>\u53d7\u4fe1\u8005\u306b\u898b\u3048\u308b\u5dee\u51fa\u4eba\uff08\u30d8\u30c3\u30c0\u30fcFrom\uff09\u3092\u76f4\u63a5\u306f\u691c\u8a3c\u3057\u3066\u3044\u306a\u3044<\/strong>\u70b9\u3067\u3059\u3002SPF\u304c\u691c\u8a3c\u3059\u308b\u306e\u306f\u914d\u9001\u306b\u4f7f\u308f\u308c\u308b\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\u3001DKIM\u304c\u691c\u8a3c\u3059\u308b\u306e\u306f\u7f72\u540d\u306b\u4f7f\u308f\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u3067\u3042\u308a\u3001\u3044\u305a\u308c\u3082\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u306b\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\u305d\u306e\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>2\u3064\u76ee\u306f\u3001<strong>\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u6271\u3044\u304c\u53d7\u4fe1\u5074\u4efb\u305b<\/strong>\u306b\u306a\u308b\u70b9\u3067\u3059\u3002\u53d7\u4fe1\u3059\u308b\u304b\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u308c\u308b\u304b\u306f\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u306b\u59d4\u306d\u3089\u308c\u3001\u9001\u4fe1\u5074\u306f\u95a2\u4e0e\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u653b\u6483\u8005\u304c\u81ea\u524d\u306e\u30c9\u30e1\u30a4\u30f3\u3067SPF\u30fbDKIM\u8a8d\u8a3c\u3092\u901a\u3057\u306a\u304c\u3089\u3001\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\u3060\u3051\u3092\u6709\u540d\u4f01\u696d\u306b\u507d\u88c5\u3059\u308b\u624b\u53e3\u304c\u6210\u7acb\u3057\u307e\u3059\u3002\u3053\u306e\u7a74\u3092\u585e\u3050\u306e\u304cDMARC\u3067\u3059\u3002<\/p>\n<h3>DMARC\u3067\u3067\u304d\u308b\u3053\u3068<\/h3>\n<p>DMARC\u304c\u63d0\u4f9b\u3059\u308b\u6a5f\u80fd\u306f\u3001\u5927\u304d\u304f2\u3064\u3067\u3059\u3002<\/p>\n<p>1\u3064\u76ee\u306f\u3001<strong>\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u6271\u3044\uff08\u30dd\u30ea\u30b7\u30fc\uff09\u3092\u9001\u4fe1\u5074\u304c\u6307\u5b9a\u3067\u304d\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002\u300c\u306a\u308a\u3059\u307e\u3057\u306e\u7591\u3044\u304c\u3042\u308b\u30e1\u30fc\u30eb\u306f\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u308c\u3066\u307b\u3057\u3044\u300d\u300c\u53d7\u4fe1\u3092\u62d2\u5426\u3057\u3066\u307b\u3057\u3044\u300d\u3068\u3044\u3063\u305f\u65b9\u91dd\u3092DNS\u4e0a\u3067\u5ba3\u8a00\u3057\u3001\u53d7\u4fe1\u5074\u306f\u305d\u308c\u306b\u5f93\u3063\u3066\u51e6\u7406\u3057\u307e\u3059\u3002<\/p>\n<p>2\u3064\u76ee\u306f\u3001<strong>\u8a8d\u8a3c\u7d50\u679c\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308c\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002DMARC\u306e\u300cR\uff08Reporting\uff09\u300d\u306b\u3042\u305f\u308b\u90e8\u5206\u3067\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304c\u3069\u3053\u304b\u3089\u3069\u308c\u3060\u3051\u9001\u4fe1\u3055\u308c\u3001\u8a8d\u8a3c\u306b\u5408\u683c\u30fb\u5931\u6557\u3057\u3066\u3044\u308b\u304b\u3092\u3001\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u304c\u30c7\u30fc\u30bf\u3067\u628a\u63e1\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>DMARC\u306e\u4ed5\u7d44\u307f<\/h2>\n<h3>DMARC\u8a8d\u8a3c\u306e\u5168\u4f53\u306e\u6d41\u308c<\/h3>\n<p>DMARC\u306f\u3001\u9001\u4fe1\u5074\u304c\u4e8b\u524d\u306b\u65b9\u91dd\u3092\u5ba3\u8a00\u3057\u3001\u53d7\u4fe1\u5074\u304c\u305d\u308c\u3092\u53c2\u7167\u3057\u3066\u5b9f\u884c\u3059\u308b\u3001\u3068\u3044\u3046\u5f79\u5272\u5206\u62c5\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2020\/07\/DMARC_mechanism-1.png\" alt=\"DMARC\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u3092\u793a\u3059\u56f3\u3002\u9001\u4fe1\u5074\u304cDNS\u306bDMARC\u30ec\u30b3\u30fc\u30c9\u3092\u4e8b\u524d\u767b\u9332\u3057\u3001\u53d7\u4fe1\u5074\u304c\u305d\u308c\u3092\u53c2\u7167\u3057\u3066SPF\u30fbDKIM\u3068\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u5224\u5b9a\u3002\u5408\u683c\u306a\u3089\u53d7\u4fe1\u30c8\u30ec\u30a4\u3078\u3001\u4e0d\u5408\u683c\u306a\u3089\u30dd\u30ea\u30b7\u30fc\uff08none\/quarantine\/reject\uff09\u306b\u5f93\u3063\u3066\u51e6\u7406\u3059\u308b\u6d41\u308c\" width=\"1881\" height=\"836\" class=\"alignnone size-full wp-image-22544\" style=\"border: 1px solid #cccccc;\" \/><\/p>\n<p>\u9001\u4fe1\u5074\u306f\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u6271\u3044\u3092\u300cDMARC\u30ec\u30b3\u30fc\u30c9\u300d\u3068\u3057\u3066DNS\u306b\u767b\u9332\u3057\u307e\u3059\u3002\u53d7\u4fe1\u5074\u306f\u30e1\u30fc\u30eb\u3092\u53d7\u3051\u53d6\u308b\u305f\u3073\u306b\u3053\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u53c2\u7167\u3057\u3001\u8a8d\u8a3c\u7d50\u679c\u3068\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u5224\u5b9a\u3057\u305f\u3046\u3048\u3067\u3001\u5408\u683c\u3057\u305f\u30e1\u30fc\u30eb\u306f\u53d7\u4fe1\u30c8\u30ec\u30a4\u3078\u3001\u4e0d\u5408\u683c\u306e\u30e1\u30fc\u30eb\u306f\u6307\u5b9a\u3055\u308c\u305f\u30dd\u30ea\u30b7\u30fc\u306b\u5f93\u3063\u3066\u51e6\u7406\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3068\u306f\u4f55\u304b\uff1f<\/h3>\n<p>DMARC\u306e\u5224\u5b9a\u3067\u9375\u306b\u306a\u308b\u306e\u304c\u300c\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u300d\u3067\u3059\u3002\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff08Alignment\uff09\u3068\u306f\u3001<strong>\u8a8d\u8a3c\u3067\u4f7f\u308f\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u3068\u3001\u53d7\u4fe1\u8005\u306b\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\uff08\u30d8\u30c3\u30c0\u30fcFrom\uff09\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b<\/strong>\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n<p>SPF\u3068DKIM\u3067\u306f\u3001\u30d8\u30c3\u30c0\u30fcFrom\u3068\u7167\u5408\u3059\u308b\u76f8\u624b\u304c\u6b21\u306e\u3088\u3046\u306b\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table>\n<tbody>\n<tr>\n<th>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u7a2e\u985e<\/th>\n<th>\u8a8d\u8a3c\u3067\u4f7f\u308f\u308c\u308b\u30c9\u30e1\u30a4\u30f3<\/th>\n<th>\u7167\u5408\u3059\u308b\u76f8\u624b<\/th>\n<\/tr>\n<tr>\n<td>SPF\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8<\/td>\n<td>\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\uff08Return-Path\uff09\u306e\u30c9\u30e1\u30a4\u30f3<\/td>\n<td>\u30d8\u30c3\u30c0\u30fcFrom\u306e\u30c9\u30e1\u30a4\u30f3<\/td>\n<\/tr>\n<tr>\n<td>DKIM\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8<\/td>\n<td>DKIM\u7f72\u540d\u306e\u30c9\u30e1\u30a4\u30f3\uff08d\uff1d\u30bf\u30b0\uff09<\/td>\n<td>\u30d8\u30c3\u30c0\u30fcFrom\u306e\u30c9\u30e1\u30a4\u30f3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u3053\u306e\u78ba\u8a8d\u304c\u5fc5\u8981\u306a\u306e\u306f\u3001\u8a8d\u8a3c\u3060\u3051\u3067\u306f\u5dee\u51fa\u4eba\u306e\u507d\u88c5\u3092\u9632\u3052\u306a\u3044\u305f\u3081\u3067\u3059\u3002\u653b\u6483\u8005\u304c\u81ea\u5206\u306e\u6240\u6709\u3059\u308b\u30c9\u30e1\u30a4\u30f3\uff08\u4f8b\uff1aattacker.com\uff09\u3067\u6b63\u3057\u304fSPF\u30fbDKIM\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u3001\u8a8d\u8a3c\u305d\u306e\u3082\u306e\u306fpass\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u53d7\u4fe1\u8005\u306b\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\u3092\u6709\u540d\u4f01\u696d\uff08\u4f8b\uff1aexample.com\uff09\u306b\u507d\u88c5\u3055\u308c\u308b\u3068\u3001<strong>\u8a8d\u8a3c\u306b\u4f7f\u3063\u305f\u30c9\u30e1\u30a4\u30f3\u3068\u53d7\u4fe1\u8005\u304c\u76ee\u306b\u3059\u308b\u5dee\u51fa\u4eba\u304c\u30d0\u30e9\u30d0\u30e9\u306e\u307e\u307e\u3001\u8a8d\u8a3c\u3060\u3051\u304c\u901a\u3063\u3066\u3057\u307e\u3044\u307e\u3059<\/strong>\u3002<\/p>\n<p>DMARC\u306f\u30d8\u30c3\u30c0\u30fcFrom\u3068\u306e\u4e00\u81f4\u307e\u3067\u78ba\u8a8d\u3059\u308b\u305f\u3081\u3001\u3053\u306e\u624b\u53e3\u3092\u691c\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u4e00\u81f4\u306e\u5224\u5b9a\u306b\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u5b8c\u5168\u4e00\u81f4\u3092\u6c42\u3081\u308b\u300cstrict\uff08\u53b3\u683c\uff09\u30e2\u30fc\u30c9\u300d\u3068\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u9055\u3044\u3092\u8a31\u5bb9\u3059\u308b\u300crelaxed\uff08\u7de9\u548c\uff09\u30e2\u30fc\u30c9\u300d\u304c\u3042\u308a\u3001\u65e2\u5b9a\u306frelaxed\u30e2\u30fc\u30c9\u3067\u3059\u3002relaxed\u3067\u3042\u308c\u3070\u3001mail.example.com \u3068 example.com \u306e\u3088\u3046\u306a\u89aa\u5b50\u95a2\u4fc2\u306e\u30c9\u30e1\u30a4\u30f3\u3082\u4e00\u81f4\u3068\u307f\u306a\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3>DMARC\u304c\u300c\u5408\u683c\u300d\u306b\u306a\u308b\u6761\u4ef6<\/h3>\n<p>DMARC\u304c\u5408\u683c\uff08pass\uff09\u3068\u5224\u5b9a\u3055\u308c\u308b\u306e\u306f\u3001\u6b21\u306e2\u3064\u306e\u6761\u4ef6\u306e\u3046\u3061<strong>\u3044\u305a\u308c\u304b\u4e00\u65b9\u3092\u6e80\u305f\u3057\u305f\u3068\u304d<\/strong>\u3067\u3059\u3002\u4e21\u65b9\u3092\u6e80\u305f\u3059\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>SPF\u8a8d\u8a3c\u304cpass\u3001\u304b\u3064 SPF\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b<\/strong><\/li>\n<li><strong>DKIM\u8a8d\u8a3c\u304cpass\u3001\u304b\u3064 DKIM\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b<\/strong><\/li>\n<\/ul>\n<\/div>\n<p>SPF\u3068DKIM\u306e\u3069\u3061\u3089\u304b\u7247\u65b9\u3067\u3082\u300c\u8a8d\u8a3c\u306epass\u300d\u3068\u300c\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u4e00\u81f4\u300d\u306e\u4e21\u65b9\u3092\u6e80\u305f\u305b\u3070\u5408\u683c\u3067\u3059\u3002\u300cSPF\u3068DKIM\u306e\u4e21\u65b9\u304cpass\u3057\u306a\u3044\u3068\u5408\u683c\u3057\u306a\u3044\u300d\u3068\u8aa4\u89e3\u3055\u308c\u304c\u3061\u3067\u3059\u304c\u3001\u305d\u3046\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u9006\u306b\u3001\u8a8d\u8a3c\u304cpass\u3057\u3066\u3044\u3066\u3082\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u3001\u305d\u306e\u6761\u4ef6\u306f\u6e80\u305f\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n<h4>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u5229\u7528\u6642\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u306a\u7406\u7531\uff08\u7b2c\u4e09\u8005\u7f72\u540d\u306e\u554f\u984c\uff09<\/h4>\n<p>\u5916\u90e8\u306e\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u308b\u5834\u5408\u3001\u521d\u671f\u8a2d\u5b9a\u306e\u307e\u307e\u3060\u3068\u3001\u53d7\u4fe1\u8005\u306b\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\u306f\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306a\u306e\u306b\u3001<strong>\u8a8d\u8a3c\u306b\u4f7f\u308f\u308c\u308b\u30c9\u30e1\u30a4\u30f3\u306f\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306e\u3082\u306e<\/strong>\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>DKIM\u3067\u306f\u3001\u30d8\u30c3\u30c0\u30fcFrom\u3068\u7570\u306a\u308b\u30c9\u30e1\u30a4\u30f3\u3067\u7f72\u540d\u3059\u308b\u65b9\u5f0f\u3092<strong>\u300c\u7b2c\u4e09\u8005\u7f72\u540d\u300d<\/strong>\u3001\u30d8\u30c3\u30c0\u30fcFrom\u3068\u540c\u3058\u30c9\u30e1\u30a4\u30f3\u3067\u7f72\u540d\u3059\u308b\u65b9\u5f0f\u3092<strong>\u300c\u4f5c\u6210\u8005\u7f72\u540d\u300d<\/strong>\u3068\u547c\u3073\u307e\u3059\u3002\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u304c\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u7f72\u540d\u3059\u308b\u3068\u7b2c\u4e09\u8005\u7f72\u540d\u3068\u306a\u308a\u3001DKIM\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306f\u4e00\u81f4\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>SPF\u3082\u540c\u69d8\u3067\u3059\u3002\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u7d4c\u7531\u3067\u306f\u3001\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\uff08Return-Path\uff09\u304c\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u66f8\u304d\u63db\u3048\u3089\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u305d\u306e\u5834\u5408\u306fSPF\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3082\u4e00\u81f4\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>\u4e21\u65b9\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u3001SPF\u30fbDKIM\u306e\u8a8d\u8a3c\u81ea\u4f53\u306f\u6210\u529f\u3057\u3066\u3044\u3066\u3082\u3001<strong>DMARC\u306f\u4e0d\u5408\u683c\u306b\u306a\u308a\u307e\u3059<\/strong>\u3002<\/p>\n<p>\u89e3\u6c7a\u7b56\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3001<strong>\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u5074\u3067\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3092\u4f7f\u3063\u305fDKIM\u7f72\u540d\uff08\u4f5c\u6210\u8005\u7f72\u540d\uff09\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u3088\u3044<\/strong>\u3060\u3051\u3067\u3059\u3002DKIM\u7f72\u540d\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306b\u306a\u308c\u3070\u3001\u30d8\u30c3\u30c0\u30fcFrom\u3068\u4e00\u81f4\u3057\u3066DKIM\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u6e80\u305f\u305b\u307e\u3059\u3002<\/p>\n<h2>DMARC\u304c\u5fc5\u8981\u3068\u3055\u308c\u308b\u7406\u7531<\/h2>\n<h3>\u306a\u308a\u3059\u307e\u3057\u30fb\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u88ab\u5bb3\u306e\u73fe\u72b6<\/h3>\n<p>\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u4ed5\u69d8\u4e0a\u3001\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u306b\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\u306f\u9001\u4fe1\u8005\u304c\u81ea\u7531\u306b\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u60aa\u610f\u306e\u3042\u308b\u7b2c\u4e09\u8005\u306f\u3001\u5b9f\u5728\u3059\u308b\u4f01\u696d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u4e57\u308a\u3001\u305d\u306e\u4f01\u696d\u304b\u3089\u306e\u30e1\u30fc\u30eb\u3067\u3042\u308b\u304b\u306e\u3088\u3046\u306b\u507d\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u3046\u3057\u305f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306f\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u8a50\u6b3a\uff08BEC\uff09\u306e\u6e29\u5e8a\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/www.antiphishing.jp\/report\/monthly\/\" target=\"_blank\" rel=\"noopener\">\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u5bfe\u7b56\u5354\u8b70\u4f1a\u306e\u6708\u6b21\u5831\u544a<\/a>\u306b\u3088\u308b\u3068\u30012026\u5e741\u6708\u306e\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u5831\u544a\u4ef6\u6570\u306f202,350\u4ef6\u306b\u9054\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u88ab\u5bb3\u3092\u53d7\u3051\u308b\u306e\u306f\u53d7\u4fe1\u8005\u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30c9\u30e1\u30a4\u30f3\u3092\u304b\u305f\u3089\u308c\u305f\u4f01\u696d\u3082\u300c\u3042\u306e\u4f1a\u793e\u306e\u30e1\u30fc\u30eb\u306f\u5371\u306a\u3044\u300d\u3068\u53d7\u3051\u53d6\u3089\u308c\u3001\u4fe1\u7528\u3092\u640d\u306a\u3044\u307e\u3059\u3002<\/p>\n<h3>Gmail\u30fbYahoo!\u30e1\u30fc\u30eb\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3067\u5b9f\u8cea\u5fc5\u9808\u306b<\/h3>\n<p>DMARC\u3092\u53d6\u308a\u5dfb\u304f\u74b0\u5883\u306f\u30012024\u5e74\u3092\u5883\u306b\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3057\u305f\u3002Google\u304c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u6539\u5b9a\u3057\u3001<strong>Gmail\u30a2\u30ab\u30a6\u30f3\u30c8\u5b9b\u3066\u306b1\u65e55,000\u4ef6\u4ee5\u4e0a\u306e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u9001\u4fe1\u8005\u306b\u5bfe\u3057\u3066\u3001SPF\u30fbDKIM\u30fbDMARC\u306e3\u3064\u3059\u3079\u3066\u306e\u8a2d\u5b9a\u3092\u7fa9\u52d9\u5316\u3057\u305f<\/strong>\u306e\u3067\u3059\u3002Yahoo!\u30e1\u30fc\u30eb\u3082\u540c\u69d8\u306e\u8981\u4ef6\u3092\u5c0e\u5165\u3057\u3066\u304a\u308a\u3001\u5bfe\u5fdc\u3057\u306a\u3044\u5834\u5408\u306f\u30e1\u30fc\u30eb\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u3055\u308c\u305f\u308a\u3001\u53d7\u4fe1\u3092\u62d2\u5426\u3055\u308c\u305f\u308a\u3059\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u65e5\u672c\u56fd\u5185\u3067\u3082\u3001\u653f\u5e9c\u304c\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u4f1a\u793e\u7b49\u306b\u5bfe\u3057\u3066DMARC\u5c0e\u5165\u306b\u3088\u308b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u5bfe\u7b56\u5f37\u5316\u3092\u8981\u8acb\u3059\u308b\u306a\u3069\u3001\u884c\u653f\u30ec\u30d9\u30eb\u3067\u5c0e\u5165\u304c\u63a8\u9032\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u8981\u4ef6\u306e\u8a73\u7d30\u306f<a href=\"https:\/\/support.google.com\/mail\/answer\/81126?hl=ja\" target=\"_blank\" rel=\"noopener\">Google\u516c\u5f0f\u306e\u300c\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d<\/a>\u3067\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u307e\u305f\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u8a73\u7d30\u306a\u8981\u4ef6\u3068\u5bfe\u5fdc\u65b9\u6cd5\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u3082\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n  <div class=\"blogcard\">\n  <a href=\"\/blog\/spam\/gmail-guideline-202402\">\n   <div class=\"blogcard_thumbnail\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2023\/11\/Gmail_guide.png\" alt=\"\u30102026\u5e74\u7248\u3011Gmail\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u5b8c\u5168\u30ac\u30a4\u30c9\uff5cSPF\u30fbDKIM\u30fbDMARC\u30685,000\u901a\u30eb\u30fc\u30eb\u3092\u89e3\u8aac\" width=\"90\" height=\"47\" \/><\/div>\n   <div class=\"blogcard_content\">\n    <div class=\"blogcard_title\">\u30102026\u5e74\u7248\u3011Gmail\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u5b8c\u5168\u30ac\u30a4\u30c9\uff5cSPF\u30fbDKIM\u30fbDMARC\u30685,000\u901a\u30eb\u30fc\u30eb\u3092\u89e3\u8aac<\/div>\n    <div class=\"blogcard_excerpt\">Gmail\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3068\u306f\u3001\u300cGmail\u306b\u30e1\u30fc\u30eb\u3092\u5c4a\u3051\u305f\u3044\u306a\u3089\u3001\u9001\u4fe1\u5074\u306f\u3053\u306e\u30eb\u30fc\u30eb\u3092\u5b88\u3063\u3066\u304f\u3060\u3055\u3044\u300d\u3068Google\u304c\u5b9a\u3081\u305f\u8981\u4ef6\u306e\u3053\u3068\u3067\u3059\u3002\u6b63\u5f0f\u540d\u2026<\/div>\n   <\/div>\n   <div class=\"clear\"><\/div>\n  <\/a>\n  <\/div>\n<h3>DMARC\u5c0e\u5165\u3067\u5f97\u3089\u308c\u308b\u3053\u3068<\/h3>\n<p>\u30dd\u30ea\u30b7\u30fc\u3092\u9694\u96e2\uff08quarantine\uff09\u3084\u62d2\u5426\uff08reject\uff09\u307e\u3067\u5f15\u304d\u4e0a\u3052\u308b\u3068\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3092\u304b\u305f\u308b\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304c\u53d7\u4fe1\u8005\u306b\u5c4a\u304f\u524d\u306b\u6392\u9664\u3055\u308c\u307e\u3059\u3002\u9867\u5ba2\u304c\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u306b\u906d\u3046\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u3057\u3001\u300c\u30c9\u30e1\u30a4\u30f3\u3092\u60aa\u7528\u3055\u308c\u305f\u4f01\u696d\u300d\u3068\u3057\u3066\u306e\u4fe1\u7528\u4f4e\u4e0b\u3082\u9632\u3052\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u306b\u3082\u95a2\u308f\u308a\u307e\u3059\u3002Gmail\u3084Yahoo!\u30e1\u30fc\u30eb\u3067\u306f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u8a2d\u5b9a\u72b6\u6cc1\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u306b\u5f71\u97ff\u3059\u308b\u305f\u3081\u3001DMARC\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3057\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u306f\u4fe1\u983c\u3067\u304d\u308b\u9001\u4fe1\u8005\u3068\u8a55\u4fa1\u3055\u308c\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u3001DMARC\u30ec\u30dd\u30fc\u30c8\u306b\u3088\u3063\u3066\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u306e\u5168\u4f53\u50cf\u3092\u30c7\u30fc\u30bf\u3067\u628a\u63e1\u3067\u304d\u307e\u3059\u3002\u306a\u308a\u3059\u307e\u3057\u306e\u691c\u77e5\u3060\u3051\u3067\u306a\u304f\u3001\u628a\u63e1\u3057\u3066\u3044\u306a\u304b\u3063\u305f\u90e8\u7f72\u304c\u5225\u306e\u30c4\u30fc\u30eb\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u3044\u305f\u3068\u3044\u3063\u305f\u793e\u5185\u306e\u30b7\u30e3\u30c9\u30fcIT\u306e\u767a\u898b\u3084\u3001\u8a8d\u8a3c\u8a2d\u5b9a\u306e\u4e0d\u5099\u306e\u6d17\u3044\u51fa\u3057\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3>\u696d\u754c\u6a19\u6e96\u3068\u3057\u3066\u7b56\u5b9a\u3055\u308c\u305f\u6280\u8853<\/h3>\n<p>DMARC\u306e\u4ed5\u69d8\u306f\u30012012\u5e74\u306bGoogle\u30fbMicrosoft\u30fbYahoo!\u30fbPayPal\u306a\u3069\u306e\u5927\u624b\u30e1\u30fc\u30eb\u4e8b\u696d\u8005\u30fb\u4f01\u696d\u306e\u9023\u5408\u306b\u3088\u3063\u3066\u7b56\u5b9a\u30fb\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u30022015\u5e74\u306b\u306f<strong>RFC 7489<\/strong>\u3068\u3057\u3066\u6587\u66f8\u5316\u3055\u308c\u3066\u3044\u307e\u3059\uff08IETF\u306e\u6b63\u5f0f\u306a\u6a19\u6e96\u3067\u306f\u306a\u304f\u3001Informational\uff1d\u60c5\u5831\u63d0\u4f9b\u6271\u3044\u306e\u6587\u66f8\uff09\u3002<\/p>\n<p>\u305d\u306e\u5f8c2026\u5e745\u6708\u3001IETF\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u6280\u8853\u306e\u6a19\u6e96\u5316\u56e3\u4f53\uff09\u304b\u3089\u5f8c\u7d99\u4ed5\u69d8\u3068\u306a\u308b<strong><a href=\"https:\/\/www.rfc-editor.org\/info\/rfc9989\/\" target=\"_blank\" rel=\"noopener\">RFC 9989<\/a>\uff08\u4e2d\u6838\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u30fbRFC 9990\uff08\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\uff09\u30fbRFC 9991\uff08\u5931\u6557\u30ec\u30dd\u30fc\u30c8\uff09<\/strong>\u306e3\u6587\u66f8\u304c\u516c\u958b\u3055\u308c\u3001RFC 7489\u306f\u5ec3\u6b62\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308aDMARC\u306f\u3001\u521d\u3081\u3066IETF\u306e\u6a19\u6e96\u5316\u904e\u7a0b\uff08Proposed Standard\uff09\u306b\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u305f\u6280\u8853\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30ec\u30b3\u30fc\u30c9\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u306f<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">v=DMARC1<\/span>\u306e\u307e\u307e\u5909\u308f\u3089\u305a\u3001\u65e2\u5b58\u306e\u8a2d\u5b9a\u304c\u305d\u306e\u307e\u307e\u7121\u52b9\u306b\u306a\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5927\u624b\u30e1\u30fc\u30eb\u30d7\u30ed\u30d0\u30a4\u30c0\u304c\u4e3b\u5c0e\u3057\u3066\u4f5c\u3089\u308c\u3001\u305d\u306e\u5f8cIETF\u306e\u6a19\u6e96\u3068\u306a\u3063\u305f\u7d4c\u7def\u304b\u3089\u3082\u3001DMARC\u306f\u4e00\u90e8\u306e\u30d9\u30f3\u30c0\u30fc\u306e\u72ec\u81ea\u6280\u8853\u3067\u306f\u306a\u304f\u3001\u30e1\u30fc\u30eb\u30a4\u30f3\u30d5\u30e9\u5168\u4f53\u306e\u6a19\u6e96\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u305f\u6280\u8853\u3060\u3068\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<h2>DMARC\u30dd\u30ea\u30b7\u30fc\u306e3\u3064\u306e\u7a2e\u985e<\/h2>\n<p>DMARC\u30dd\u30ea\u30b7\u30fc\uff08p\u30bf\u30b0\u3067\u6307\u5b9a\u3059\u308b\u5024\uff09\u306b\u306f\u3001\u4ee5\u4e0b\u306e3\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002none\u2192quarantine\u2192reject\u306e\u9806\u306b\u5236\u5fa1\u304c\u5f37\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table>\n<tbody>\n<tr>\n<th>\u30dd\u30ea\u30b7\u30fc<\/th>\n<th>\u610f\u5473<\/th>\n<th>\u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u306e\u6271\u3044<\/th>\n<th>\u4e3b\u306a\u7528\u9014<\/th>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=none<\/span><\/td>\n<td>\u76e3\u8996<\/td>\n<td>\u901a\u5e38\u3069\u304a\u308a\u53d7\u4fe1\u3055\u305b\u308b<\/td>\n<td>\u30ec\u30dd\u30fc\u30c8\u3067\u73fe\u72b6\u3092\u628a\u63e1\u3059\u308b\u5c0e\u5165\u521d\u671f\u30d5\u30a7\u30fc\u30ba<\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=quarantine<\/span><\/td>\n<td>\u9694\u96e2<\/td>\n<td>\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u7b49\u3078\u632f\u308a\u5206\u3051\u308b<\/td>\n<td>\u5f71\u97ff\u3092\u78ba\u8a8d\u3057\u306a\u304c\u3089\u5236\u5fa1\u3092\u5f37\u3081\u308b\u4e2d\u9593\u30d5\u30a7\u30fc\u30ba<\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=reject<\/span><\/td>\n<td>\u62d2\u5426<\/td>\n<td>\u53d7\u4fe1\u81ea\u4f53\u3092\u62d2\u5426\u3059\u308b<\/td>\n<td>\u306a\u308a\u3059\u307e\u3057\u3092\u5b8c\u5168\u306b\u906e\u65ad\u3059\u308b\u6700\u7d42\u76ee\u6a19<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><strong>none\u3067\u3082DMARC\u5bfe\u5fdc\u3068\u3057\u3066\u6210\u7acb\u3057\u307e\u3059<\/strong>\u3002Gmail\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u304c\u5927\u91cf\u9001\u4fe1\u8005\u306b\u6c42\u3081\u308bDMARC\u8a2d\u5b9a\u3082\u3001\u6700\u4f4e\u8981\u4ef6\u306fp=none\u3067\u3059\u3002\u307e\u305a\u306fnone\u3067\u5c0e\u5165\u3057\u3066\u30ec\u30dd\u30fc\u30c8\u3092\u53ce\u96c6\u3057\u3001\u6b63\u898f\u30e1\u30fc\u30eb\u304c\u78ba\u5b9f\u306b\u8a8d\u8a3c\u3092\u901a\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u6bb5\u968e\u7684\u306b\u5f37\u5316\u3059\u308b\u306e\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>DMARC\u30ec\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9<\/h2>\n<h3>DMARC\u30ec\u30b3\u30fc\u30c9\u306e\u57fa\u672c\u69cb\u6587<\/h3>\n<p>DMARC\u306e\u8a2d\u5b9a\u5185\u5bb9\u306f\u3001<strong>\u300c_dmarc.\u30c9\u30e1\u30a4\u30f3\u540d\u300d\u3068\u3044\u3046\u30db\u30b9\u30c8\u540d\u306eTXT\u30ec\u30b3\u30fc\u30c9<\/strong>\u3068\u3057\u3066DNS\u306b\u516c\u958b\u3057\u307e\u3059\u3002DNS\u306b\u65b0\u3057\u3044\u4ed5\u7d44\u307f\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u306f\u306a\u304f\u3001\u4e00\u822c\u7684\u306a\u30c6\u30ad\u30b9\u30c8\u30ec\u30b3\u30fc\u30c9\u3092\u305d\u306e\u307e\u307e\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u30c9\u30e1\u30a4\u30f3\u304c\u300cexample.com\u300d\u306e\u5834\u5408\u3001\u6700\u5c0f\u69cb\u6210\u306eDMARC\u30ec\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">_dmarc.example.com IN TXT &#8220;v=DMARC1; p=none; rua=mailto:dmarc-report@example.com&#8221;<\/span><\/p>\n<p>\u3053\u306e\u4f8b\u306f\u300cDMARC\u30d0\u30fc\u30b8\u30e7\u30f31\u3092\u4f7f\u7528\u3057\u3001\u8a8d\u8a3c\u5931\u6557\u30e1\u30fc\u30eb\u306f\u901a\u5e38\u3069\u304a\u308a\u53d7\u4fe1\u3055\u305b\u3001\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\u3092dmarc-report@example.com\u5b9b\u3066\u306b\u9001\u3063\u3066\u307b\u3057\u3044\u300d\u3068\u3044\u3046\u5ba3\u8a00\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<h3>\u4e3b\u306a\u30bf\u30b0\u306e\u610f\u5473\u3068\u8a2d\u5b9a\u5024<\/h3>\n<p>DMARC\u30ec\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3067\u304d\u308b\u4e3b\u306a\u30bf\u30b0\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002\u5fc5\u9808\u306a\u306e\u306fv\u30bf\u30b0\u3068p\u30bf\u30b0\u306e2\u3064\u3067\u3001\u305d\u308c\u4ee5\u5916\u306f\u4efb\u610f\u3067\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table>\n<tbody>\n<tr>\n<th>\u30bf\u30b0<\/th>\n<th>\u610f\u5473<\/th>\n<th>\u8a2d\u5b9a\u5024\u306e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">v<\/span><\/td>\n<td>DMARC\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\uff08\u5fc5\u9808\u30fb\u5148\u982d\u306b\u8a18\u8ff0\uff09<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">v=DMARC1<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p<\/span><\/td>\n<td>\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u30dd\u30ea\u30b7\u30fc\uff08\u5fc5\u9808\uff09<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=none<\/span> \/ <span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">quarantine<\/span> \/ <span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">reject<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">rua<\/span><\/td>\n<td>\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4ed8\u5148\u30a2\u30c9\u30ec\u30b9<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">rua=mailto:report@example.com<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">ruf<\/span><\/td>\n<td>\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4ed8\u5148\u30a2\u30c9\u30ec\u30b9<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">ruf=mailto:forensic@example.com<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">sp<\/span><\/td>\n<td>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u9069\u7528\u3059\u308b\u30dd\u30ea\u30b7\u30fc<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">sp=reject<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">adkim<\/span><\/td>\n<td>DKIM\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u5224\u5b9a\u30e2\u30fc\u30c9<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">adkim=r<\/span>\uff08relaxed\uff09\/ <span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">s<\/span>\uff08strict\uff09<\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">aspf<\/span><\/td>\n<td>SPF\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u5224\u5b9a\u30e2\u30fc\u30c9<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">aspf=r<\/span>\uff08relaxed\uff09\/ <span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">s<\/span>\uff08strict\uff09<\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">fo<\/span><\/td>\n<td>\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u3092\u751f\u6210\u3059\u308b\u6761\u4ef6<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">fo=1<\/span>\uff08\u3044\u305a\u308c\u304b\u306e\u8a8d\u8a3c\u5931\u6557\u3067\u751f\u6210\uff09<\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">np<\/span><\/td>\n<td>\u5b58\u5728\u3057\u306a\u3044\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u9069\u7528\u3059\u308b\u30dd\u30ea\u30b7\u30fc<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">np=reject<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">t<\/span><\/td>\n<td>\u30c6\u30b9\u30c8\u30e2\u30fc\u30c9\uff08\u30dd\u30ea\u30b7\u30fc\u3092\u9069\u7528\u305b\u305a\u69d8\u5b50\u3092\u898b\u308b\uff09<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">t=y<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>sp\u30bf\u30b0\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u306f\u89aa\u30c9\u30e1\u30a4\u30f3\u306e\u30dd\u30ea\u30b7\u30fc\u304c\u305d\u306e\u307e\u307e\u9069\u7528\u3055\u308c\u307e\u3059\u3002\u5b58\u5728\u3057\u306a\u3044\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u72d9\u3063\u305f\u306a\u308a\u3059\u307e\u3057\u3092\u9632\u3050\u306b\u306f\u3001<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">np=reject<\/span>\u306e\u6307\u5b9a\u304c\u6709\u52b9\u3067\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u4ee5\u524d\u306f\u9069\u7528\u5272\u5408\u3092\u6307\u5b9a\u3059\u308b<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">pct<\/span>\u30bf\u30b0\u304c\u4f7f\u308f\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u53d7\u4fe1\u5074\u3067\u306e\u89e3\u91c8\u304c\u7d71\u4e00\u3055\u308c\u306a\u304b\u3063\u305f\u305f\u3081\u30012026\u5e745\u6708\u306eRFC 9989\u3067\u5ec3\u6b62\u3055\u308c\u307e\u3057\u305f\uff08\u3042\u308f\u305b\u3066<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">rf<\/span>\u30fb<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">ri<\/span>\u3082\u5ec3\u6b62\uff09\u3002\u3059\u3067\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u76f4\u3061\u306b\u554f\u984c\u306f\u8d77\u304d\u307e\u305b\u3093\u304c\u3001\u6bb5\u968e\u7684\u306a\u5c0e\u5165\u306b\u306f<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">t=y<\/span>\u306b\u3088\u308b\u30c6\u30b9\u30c8\u30e2\u30fc\u30c9\u306e\u5229\u7528\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>DMARC\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n<p>DMARC\u306e\u8a2d\u5b9a\u306f\u3001\u5927\u304d\u304f4\u3064\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u9032\u3081\u307e\u3059\u3002<\/p>\n<h3>\u624b\u98061\uff1aSPF\u3068DKIM\u3092\u8a2d\u5b9a\u3059\u308b<\/h3>\n<p>DMARC\u306fSPF\u30fbDKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u3001<strong>\u5c11\u306a\u304f\u3068\u3082\u3069\u3061\u3089\u304b\u4e00\u65b9\uff08\u63a8\u5968\u306f\u4e21\u65b9\uff09\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u524d\u63d0<\/strong>\u3067\u3059\u3002\u672a\u8a2d\u5b9a\u306e\u5834\u5408\u306f\u3001\u5148\u306bSPF\u30ec\u30b3\u30fc\u30c9\u306e\u767b\u9332\u3068DKIM\u7f72\u540d\u306e\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u3042\u308f\u305b\u3066\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u306e\u6d17\u3044\u51fa\u3057\u3082\u884c\u3044\u307e\u3059\u3002\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3060\u3051\u3067\u306a\u304f\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u30fbCRM\u30fb\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\u306a\u3069\u3001\u9001\u4fe1\u7d4c\u8def\u3092\u3059\u3079\u3066\u628a\u63e1\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3001\u5f8c\u306e\u30d5\u30a7\u30fc\u30ba\u3067\u6b63\u898f\u30e1\u30fc\u30eb\u304c\u8a8d\u8a3c\u306b\u5931\u6557\u3059\u308b\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>DKIM\u306e\u5177\u4f53\u7684\u306a\u8a2d\u5b9a\u624b\u9806\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n  <div class=\"blogcard\">\n  <a href=\"\/blog\/spam\/dkim-setting\">\n   <div class=\"blogcard_thumbnail\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2024\/06\/dkim-setting-1.png\" alt=\"DKIM\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3068\u6ce8\u610f\u70b9\u3092\u89e3\u8aac\uff01\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u79d8\u8a23\u3068\u306f\uff1f\" width=\"90\" height=\"63\" \/><\/div>\n   <div class=\"blogcard_content\">\n    <div class=\"blogcard_title\">DKIM\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3068\u6ce8\u610f\u70b9\u3092\u89e3\u8aac\uff01\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u79d8\u8a23\u3068\u306f\uff1f<\/div>\n    <div class=\"blogcard_excerpt\">\u30e1\u30fc\u30eb\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3057\u3001\u53d7\u4fe1\u8005\u306b\u5b89\u5fc3\u3057\u3066\u30e1\u30fc\u30eb\u3092\u53d7\u3051\u53d6\u3063\u3066\u3082\u3089\u3046\u305f\u3081\u306b\u306f\u3001DKIM\uff08DomainKeys Identified Mail\uff09\u306e\u8a2d\u5b9a\u2026<\/div>\n   <\/div>\n   <div class=\"clear\"><\/div>\n  <\/a>\n  <\/div>\n<h3>\u624b\u98062\uff1a\u30ec\u30dd\u30fc\u30c8\u53d7\u4fe1\u7528\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u7528\u610f\u3059\u308b<\/h3>\n<p>DMARC\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4ed8\u5148\u3068\u306a\u308b\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u7528\u610f\u3057\u307e\u3059\u3002\u30ec\u30dd\u30fc\u30c8\u306f\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u3054\u3068\u306b\u9001\u3089\u308c\u3066\u304f\u308b\u305f\u3081\u3001\u65e5\u5e38\u696d\u52d9\u7528\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u306f\u5206\u3051\u3066\u3001\u5c02\u7528\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3059\u308b\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n<h3>\u624b\u98063\uff1aDNS\u306bDMARC\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3059\u308b<\/h3>\n<p>\u5229\u7528\u3057\u3066\u3044\u308bDNS\u30b5\u30fc\u30d3\u30b9\u306e\u7ba1\u7406\u753b\u9762\u304b\u3089\u3001TXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066DMARC\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3057\u307e\u3059\u3002\u30db\u30b9\u30c8\u540d\u306f\u300c_dmarc.\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u300d\u3001\u5024\u306f\u524d\u8ff0\u306e\u69cb\u6587\u306b\u5f93\u3063\u3066\u8a18\u8ff0\u3057\u307e\u3059\u3002\u521d\u56de\u306f\u5fc5\u305a<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">p=none<\/span>\u304b\u3089\u59cb\u3081\u307e\u3059\u3002<\/p>\n<h3>\u624b\u98064\uff1a\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3046<\/h3>\n<p>\u8a2d\u5b9a\u5f8c\u306f\u3001\u6b21\u306e2\u70b9\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<p>1\u3064\u76ee\u306f<strong>\u30ec\u30b3\u30fc\u30c9\u306e\u516c\u958b\u78ba\u8a8d<\/strong>\u3067\u3059\u3002\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">nslookup -type=txt _dmarc.example.com<\/span>\u3092\u5b9f\u884c\u3057\u3001\u767b\u9332\u3057\u305f\u5185\u5bb9\u304c\u8fd4\u3063\u3066\u304f\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<p>2\u3064\u76ee\u306f<strong>\u8a8d\u8a3c\u7d50\u679c\u306e\u78ba\u8a8d<\/strong>\u3067\u3059\u3002Gmail\u3084Outlook\u306a\u3069DMARC\u5bfe\u5fdc\u30d7\u30ed\u30d0\u30a4\u30c0\u306e\u30a2\u30c9\u30ec\u30b9\u306b\u81ea\u793e\u304b\u3089\u30c6\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u9001\u308a\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\uff08\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30bd\u30fc\u30b9\uff09\u3092\u958b\u3044\u3066\u300cAuthentication-Results\u300d\u6b04\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<p>Authentication-Results\u6b04\u306e<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">spf=<\/span>\u3001<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">dkim=<\/span>\u3001<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">dmarc=<\/span>\u306e\u5024\u304c\u3059\u3079\u3066<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">pass<\/span>\u306b\u306a\u3063\u3066\u3044\u308c\u3070\u3001\u6b63\u5e38\u306b\u8a8d\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>DMARC\u30ec\u30dd\u30fc\u30c8\u306e\u898b\u65b9\u3068\u6d3b\u7528\u65b9\u6cd5<\/h2>\n<p>DMARC\u30ec\u30dd\u30fc\u30c8\u306b\u306f2\u7a2e\u985e\u3042\u308a\u3001\u6027\u8cea\u304c\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\uff08RUA\uff09<\/h3>\n<p>\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\uff08Aggregate Report\uff09\u306f\u3001<strong>\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u304c\u89b3\u6e2c\u3057\u305f\u8a8d\u8a3c\u7d50\u679c\u306e\u7d71\u8a08\u60c5\u5831\u3092\u3001\u901a\u5e381\u65e51\u56de\u7a0b\u5ea6\u306e\u983b\u5ea6\u3067\u307e\u3068\u3081\u3066\u9001\u4ed8\u3057\u3066\u304f\u308c\u308b<\/strong>\u30ec\u30dd\u30fc\u30c8\u3067\u3059\u3002rua\u30bf\u30b0\u3067\u6307\u5b9a\u3057\u305f\u30a2\u30c9\u30ec\u30b9\u306bXML\u5f62\u5f0f\u3067\u5c4a\u304d\u307e\u3059\u3002<\/p>\n<p>\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3054\u3068\u306e\u30e1\u30fc\u30eb\u4ef6\u6570\u3001SPF\u30fbDKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3001\u9069\u7528\u3055\u308c\u305f\u30dd\u30ea\u30b7\u30fc\u306a\u3069\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u300c\u628a\u63e1\u3057\u3066\u3044\u306a\u3044\u9001\u4fe1\u5143\u304b\u3089\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u304c\u51fa\u3066\u3044\u306a\u3044\u304b\u300d\u300c\u6b63\u898f\u306e\u9001\u4fe1\u7d4c\u8def\u304c\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u306a\u3044\u304b\u300d\u3092\u5206\u6790\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>XML\u3092\u305d\u306e\u307e\u307e\u8aad\u3080\u306e\u306f\u5927\u5909\u306a\u305f\u3081\u3001\u5b9f\u52d9\u3067\u306fDMARC\u30ec\u30dd\u30fc\u30c8\u306e\u53ef\u8996\u5316\u30c4\u30fc\u30eb\u3084\u5206\u6790\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n<h3>\u5931\u6557\u30ec\u30dd\u30fc\u30c8\uff08RUF\uff09<\/h3>\n<p>\u5931\u6557\u30ec\u30dd\u30fc\u30c8\uff08Failure Report\uff0fForensic Report\uff09\u306f\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u500b\u3005\u306e\u30e1\u30fc\u30eb\u306b\u3064\u3044\u3066\u3001\u305d\u306e\u8a73\u7d30\u60c5\u5831\u3092\u9001\u4ed8\u3057\u3066\u304f\u308c\u308b\u30ec\u30dd\u30fc\u30c8\u3067\u3059\u3002ruf\u30bf\u30b0\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u5931\u6557\u30ec\u30dd\u30fc\u30c8\u306b\u306f\u30e1\u30fc\u30eb\u672c\u6587\u306a\u3069\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u5f97\u308b\u305f\u3081\u3001<strong>\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u4fdd\u8b77\u306e\u89b3\u70b9\u304b\u3089\u9001\u4ed8\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u53d7\u4fe1\u30d7\u30ed\u30d0\u30a4\u30c0\u304c\u591a\u3044<\/strong>\u306e\u304c\u5b9f\u60c5\u3067\u3059\u3002\u904b\u7528\u306e\u4e3b\u8ef8\u306f\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\uff08RUA\uff09\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30dd\u30ea\u30b7\u30fc\u3092\u6bb5\u968e\u7684\u306b\u5f37\u5316\u3059\u308b\u9032\u3081\u65b9<\/h2>\n<p>DMARC\u30dd\u30ea\u30b7\u30fc\u306f\u3001\u3044\u304d\u306a\u308areject\u306b\u8a2d\u5b9a\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u6bb5\u968e\u7684\u306b\u5f37\u5316\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6025\u306breject\u3078\u5909\u66f4\u3059\u308b\u3068\u3001\u8a2d\u5b9a\u6f0f\u308c\u306e\u3042\u308b\u6b63\u898f\u30e1\u30fc\u30eb\u307e\u3067\u62d2\u5426\u3055\u308c\u3066\u3057\u307e\u3046\u30ea\u30b9\u30af\u304c\u3042\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<div class=\"su-table su-table-alternate\">\n<table>\n<tbody>\n<tr>\n<th>\u30d5\u30a7\u30fc\u30ba<\/th>\n<th>\u30dd\u30ea\u30b7\u30fc\u8a2d\u5b9a<\/th>\n<th>\u76ee\u7684<\/th>\n<th>\u76ee\u5b89\u671f\u9593<\/th>\n<\/tr>\n<tr>\n<td>Phase 1<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=none<\/span><\/td>\n<td>\u30ec\u30dd\u30fc\u30c8\u3067\u73fe\u72b6\u306e\u8a8d\u8a3c\u72b6\u6cc1\u3068\u9001\u4fe1\u7d4c\u8def\u3092\u628a\u63e1\u3059\u308b<\/td>\n<td>2\u301c4\u9031\u9593<\/td>\n<\/tr>\n<tr>\n<td>Phase 2<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=quarantine<\/span><\/td>\n<td>\u7591\u308f\u3057\u3044\u30e1\u30fc\u30eb\u3092\u8ff7\u60d1\u30e1\u30fc\u30eb\u3078\u632f\u308a\u5206\u3051\u3001\u5f71\u97ff\u3092\u78ba\u8a8d\u3059\u308b<\/td>\n<td>2\u301c4\u9031\u9593<\/td>\n<\/tr>\n<tr>\n<td>Phase 3<\/td>\n<td><span style=\"background: #f2f2f2;padding: .1em .4em;border-radius: 3px;font-family: monospace;font-size: .95em\">p=reject<\/span><\/td>\n<td>\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u5b8c\u5168\u306b\u30d6\u30ed\u30c3\u30af\u3059\u308b\uff08\u6700\u7d42\u76ee\u6a19\uff09<\/td>\n<td>\u6052\u4e45\u904b\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5404\u30d5\u30a7\u30fc\u30ba\u3067DMARC\u30ec\u30dd\u30fc\u30c8\u3092\u78ba\u8a8d\u3057\u3001<strong>\u6b63\u898f\u30e1\u30fc\u30eb\u304c\u3059\u3079\u3066\u8a8d\u8a3c\u306b\u5408\u683c\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u304b\u3081\u3066\u304b\u3089\u6b21\u306e\u30d5\u30a7\u30fc\u30ba\u3078\u9032\u307f\u307e\u3059<\/strong>\u3002\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u3081\u308b\u524d\u306b\u5f71\u97ff\u3092\u898b\u305f\u3044\u5834\u5408\u306f\u3001<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">t=y<\/span>\u3092\u6307\u5b9a\u3057\u3066\u30c6\u30b9\u30c8\u30e2\u30fc\u30c9\u3067\u904b\u7528\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>DMARC\u5c0e\u5165\u6642\u306e\u6ce8\u610f\u70b9\u3068\u9650\u754c<\/h2>\n<h3>\u8a2d\u5b9a\u3092\u8aa4\u308b\u3068\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u304f\u306a\u308b<\/h3>\n<p>\u6700\u5927\u306e\u30ea\u30b9\u30af\u306f\u3001\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u304c\u8a8d\u8a3c\u306b\u5931\u6557\u3059\u308b\u72b6\u614b\u306e\u307e\u307e\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u5316\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u3067\u3059\u3002\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3084CRM\u306a\u3069\u3001\u628a\u63e1\u3057\u3066\u3044\u306a\u3044\u9001\u4fe1\u7d4c\u8def\u304c\u6b8b\u3063\u3066\u3044\u308b\u3068\u3001<strong>\u305d\u3053\u304b\u3089\u9001\u3089\u308c\u308b\u6b63\u898f\u30e1\u30fc\u30eb\u304c\u9694\u96e2\u30fb\u62d2\u5426\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059<\/strong>\u3002none\u304b\u3089\u59cb\u3081\u3066\u30ec\u30dd\u30fc\u30c8\u3067\u9001\u4fe1\u7d4c\u8def\u3092\u6d17\u3044\u51fa\u3059\u624b\u9806\u3092\u5fc5\u305a\u5b88\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u985e\u4f3c\u30c9\u30e1\u30a4\u30f3\u3084\u8868\u793a\u540d\u306e\u507d\u88c5\u306f\u9632\u3052\u306a\u3044<\/h3>\n<p>DMARC\u304c\u9632\u3052\u308b\u306e\u306f\u300c\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u305d\u306e\u3082\u306e\u300d\u3092\u5dee\u51fa\u4eba\u306b\u3057\u305f\u306a\u308a\u3059\u307e\u3057\u3067\u3059\u3002\u4e00\u65b9\u3067\u3001\u6b21\u306e\u3088\u3046\u306a\u624b\u53e3\u306b\u306f\u52b9\u679c\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>1\u3064\u76ee\u306f<strong>\u985e\u4f3c\u30c9\u30e1\u30a4\u30f3\uff08\u30c9\u30c3\u30da\u30eb\u30b2\u30f3\u30ac\u30fc\u30c9\u30e1\u30a4\u30f3\uff09<\/strong>\u3067\u3059\u3002example.com\u306b\u5bfe\u3059\u308bexampIe.com\uff08\u5c0f\u6587\u5b57\u306el\u3092\u5927\u6587\u5b57\u306eI\u306b\u5909\u3048\u308b\u306a\u3069\uff09\u306e\u3088\u3046\u306b\u3001\u672c\u7269\u306b\u4f3c\u305b\u305f\u5225\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3059\u308b\u624b\u53e3\u3067\u3059\u3002<\/p>\n<p>2\u3064\u76ee\u306f<strong>\u8868\u793a\u540d\u306e\u507d\u88c5<\/strong>\u3067\u3059\u3002\u5dee\u51fa\u4eba\u306e\u8868\u793a\u540d\u3060\u3051\u3092\u300c\u3007\u3007\u682a\u5f0f\u4f1a\u793e\u300d\u3068\u507d\u88c5\u3057\u3001\u5b9f\u969b\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306b\u306f\u653b\u6483\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u4f7f\u3046\u624b\u53e3\u3067\u3059\u3002<\/p>\n<p>DMARC\u306f\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u6280\u8853\u3067\u3042\u308a\u3001\u53d7\u4fe1\u8005\u3078\u306e\u6ce8\u610f\u559a\u8d77\u3084\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306a\u3069\u3001\u4ed6\u306e\u5bfe\u7b56\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u904b\u7528\u3059\u308b\u3053\u3068\u304c\u524d\u63d0\u3067\u3059\u3002<\/p>\n<h3>\u8ee2\u9001\u3084\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u3067\u306f\u6b63\u898f\u30e1\u30fc\u30eb\u3082\u5931\u6557\u3057\u3046\u308b<\/h3>\n<p>\u30e1\u30fc\u30eb\u304c\u8ee2\u9001\u3055\u308c\u305f\u308a\u3001\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u3092\u7d4c\u7531\u3057\u305f\u308a\u3059\u308b\u3068\u3001\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u3067\u3082DMARC\u306b\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u8ee2\u9001\u3067\u9001\u4fe1\u5143IP\u304c\u5909\u308f\u308b\u3068SPF\u304c\u5931\u6557\u3057\u3001\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u304c\u4ef6\u540d\u3084\u672c\u6587\u3092\u66f8\u304d\u63db\u3048\u308b\u3068DKIM\u7f72\u540d\u304c\u58ca\u308c\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u300c\u9593\u63a5\u7684\u306a\u914d\u9001\u7d4c\u8def\u300d\u306e\u554f\u984c\u306f\u3001DMARC\u306e\u4ed5\u69d8\u4e0a\u307e\u3060\u89e3\u6c7a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002RFC 9989\u3067\u3082\u3001\u5229\u7528\u8005\u304c\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u306b\u6295\u7a3f\u3059\u308b\u3088\u3046\u306a\u30c9\u30e1\u30a4\u30f3\u306b\u3064\u3044\u3066\u306f\u3001\u5f71\u97ff\u3092\u8a55\u4fa1\u3057\u306a\u3044\u307e\u307e<span style=\"background: #f2f2f2; padding: .1em .4em; border-radius: 3px; font-family: monospace; font-size: .95em;\">p=reject<\/span>\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u306b\u614e\u91cd\u306a\u59ff\u52e2\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u81ea\u793e\u306e\u9001\u4fe1\u7d4c\u8def\u3092\u628a\u63e1\u3057\u305f\u3046\u3048\u3067\u3001\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u3081\u308b\u5224\u65ad\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3>SPF\u30fbDKIM\u306e\u6574\u5099\u304c\u524d\u63d0\u306b\u306a\u308b<\/h3>\n<p>DMARC\u306f\u3001SPF\u30fbDKIM\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3001\u304b\u3064\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u6e80\u305f\u3059\u69cb\u6210\u306b\u306a\u3063\u3066\u521d\u3081\u3066\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u7279\u306b\u5916\u90e8\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3067\u306eDKIM\u7f72\u540d\uff08\u4f5c\u6210\u8005\u7f72\u540d\uff09\u304c\u8a2d\u5b9a\u3067\u304d\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>DMARC\u5c0e\u5165\u306e\u5148\u306b\u3042\u308b\u300cBIMI\u300d\u3068\u306f<\/h2>\n<p>DMARC\u306e\u30dd\u30ea\u30b7\u30fc\u3092quarantine\u307e\u305f\u306freject\u307e\u3067\u5f15\u304d\u4e0a\u3052\u308b\u3068\u3001\u300cBIMI\uff08Brand Indicators for Message Identification\uff09\u300d\u3092\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u53d7\u4fe1\u30c8\u30ec\u30a4\u306b\u81ea\u793e\u30ed\u30b4\u3092\u8868\u793a\u3067\u304d\u308b<\/h3>\n<p>BIMI\u3068\u306f\u3001DMARC\u8a8d\u8a3c\u3092\u5229\u7528\u3057\u3066\u3001<strong>\u53d7\u4fe1\u30c8\u30ec\u30a4\u306e\u9001\u4fe1\u8005\u540d\u306e\u6a2a\u306b\u4f01\u696d\u306e\u516c\u5f0f\u30ed\u30b4\u30de\u30fc\u30af\u3092\u8868\u793a\u3055\u305b\u308b\u4ed5\u7d44\u307f<\/strong>\u3067\u3059\u3002<\/p>\n<p>\u8868\u793a\u306b\u306fDMARC\u30dd\u30ea\u30b7\u30fc\u306e\u5f37\u5316\u306b\u52a0\u3048\u3066\u3001\u30ed\u30b4\u3092\u6307\u5b9a\u3059\u308bBIMI\u30ec\u30b3\u30fc\u30c9\u306e\u516c\u958b\u304c\u5fc5\u8981\u3067\u3059\u3002Gmail\u306a\u3069BIMI\u306b\u5bfe\u5fdc\u3059\u308b\u4e00\u90e8\u306e\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001\u3042\u308f\u305b\u3066VMC\uff08\u8a8d\u8a3c\u30de\u30fc\u30af\u8a3c\u660e\u66f8\uff09\u306e\u53d6\u5f97\u3082\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u901a\u5e38\u3001\u53d7\u4fe1\u753b\u9762\u306e\u9001\u4fe1\u8005\u30a2\u30a4\u30b3\u30f3\u306f\u7a7a\u767d\u304b\u540d\u524d\u306e\u982d\u6587\u5b57\u3067\u3059\u304c\u3001BIMI\u306b\u5bfe\u5fdc\u3059\u308b\u3068\u3001\u30e1\u30fc\u30eb\u3092\u958b\u304f\u524d\u304b\u3089\u300c\u9593\u9055\u3044\u306a\u304f\u3042\u306e\u4f01\u696d\u304b\u3089\u306e\u30e1\u30fc\u30eb\u3060\u300d\u3068\u4e00\u76ee\u3067\u5224\u5225\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>BIMI\u3092\u5c0e\u5165\u3059\u308b\u30e1\u30ea\u30c3\u30c8<\/h3>\n<p>BIMI\u306b\u306f\u3001\u306a\u308a\u3059\u307e\u3057\u5bfe\u7b56\u3068\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u6210\u679c\u5411\u4e0a\u306e\u4e21\u9762\u3067\u52b9\u679c\u304c\u898b\u8fbc\u3081\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u306a\u308a\u3059\u307e\u3057\u5bfe\u7b56\u306e\u8996\u899a\u5316<\/strong>\uff1a\u300c\u30ed\u30b4\uff1d\u8a8d\u8a3c\u6e08\u307f\u306e\u5b89\u5168\u306a\u30e1\u30fc\u30eb\u300d\u3068\u4e00\u76ee\u3067\u4f1d\u308f\u308b<\/li>\n<li><strong>\u958b\u5c01\u7387\u306e\u5411\u4e0a<\/strong>\uff1a\u516c\u5f0f\u30ed\u30b4\u3067\u5b89\u5fc3\u611f\u304c\u9ad8\u307e\u308a\u3001\u53d7\u4fe1\u30c8\u30ec\u30a4\u3067\u76ee\u7acb\u3064<\/li>\n<li><strong>\u30d6\u30e9\u30f3\u30c9\u8a8d\u77e5\u5ea6\u306e\u5411\u4e0a<\/strong>\uff1a\u958b\u5c01\u524d\u3067\u3082\u30ed\u30b4\u304c\u8996\u754c\u306b\u5165\u308b<\/li>\n<\/ul>\n<\/div>\n<p>\u5b9f\u969b\u306bBIMI\u3092\u5c0e\u5165\u3059\u308b\u3068\u3069\u306e\u3088\u3046\u306a\u624b\u9806\u306b\u306a\u308b\u306e\u304b\u3001\u62c5\u5f53\u8005\u76ee\u7dda\u306e\u4f53\u9a13\u8ac7\u3092\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n  <div class=\"blogcard\">\n  <a href=\"\/blog\/spam\/bimi-introduction\">\n   <div class=\"blogcard_thumbnail\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2026\/03\/unnamed.jpg\" alt=\"\u3010\u4f53\u9a13\u8ac7\u3011BIMI\u5c0e\u5165\u306e\u5168\u8a18\u9332\uff5cDMARC\u30dd\u30ea\u30b7\u30fc\u5f15\u304d\u4e0a\u3052\u304b\u3089\u30ed\u30b4\u304c\u8868\u793a\u3055\u308c\u308b\u307e\u3067\uff5e\u73fe\u5834\u306e\u82e6\u52b4\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u88cf\u5074\u3092\u516c\u958b\uff5e\" width=\"90\" height=\"50\" \/><\/div>\n   <div class=\"blogcard_content\">\n    <div class=\"blogcard_title\">\u3010\u4f53\u9a13\u8ac7\u3011BIMI\u5c0e\u5165\u306e\u5168\u8a18\u9332\uff5cDMARC\u30dd\u30ea\u30b7\u30fc\u5f15\u304d\u4e0a\u3052\u304b\u3089\u30ed\u30b4\u304c\u8868\u793a\u3055\u308c\u308b\u307e\u3067\uff5e\u73fe\u5834\u306e\u82e6\u52b4\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u88cf\u5074\u3092\u516c\u958b\uff5e<\/div>\n    <div class=\"blogcard_excerpt\">2024\u5e742\u6708\u3088\u308a\u9806\u6b21\u9069\u7528\u304c\u958b\u59cb\u3055\u308c\u305fGmail\u306e\u65b0\u3057\u3044\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff08\u540c\u5e744\u6708\u306b\u5b8c\u5168\u65bd\u884c\uff09\u3092\u304d\u3063\u304b\u3051\u306b\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u306b\u304a\u3044\u3066\u300c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u2026<\/div>\n   <\/div>\n   <div class=\"clear\"><\/div>\n  <\/a>\n  <\/div>\n<h3>BIMI\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u77e5\u308a\u305f\u3044\u30fb\u76f8\u8ac7\u3057\u305f\u3044\u5834\u5408<\/h3>\n<p>BIMI\u306e\u30e1\u30ea\u30c3\u30c8\u304b\u3089\u5c0e\u5165\u30b9\u30c6\u30c3\u30d7\u3001DMARC\u79fb\u884c\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3001\u8a2d\u5b9a\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u307e\u3067\u3092\u307e\u3068\u3081\u305f\u300cBIMI\u5b8c\u5168\u30ac\u30a4\u30c9\u300d\u3092\u7121\u6599\u3067\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002BIMI\u306b\u3064\u3044\u3066\u306e\u304a\u554f\u3044\u5408\u308f\u305b\u3084\u76f8\u8ac7\u3082\u53ef\u80fd\u3067\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<p><a href=\"https:\/\/blastmail.jp\/blog\/download\/bimi\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2022\/01\/bimi-expert.jpg\" alt=\"BIMI\u76f8\u8ac7\u30d0\u30ca\u30fc\" class=\"alignnone size-full\" \/><\/a><\/p>\n<h2>DMARC\u5bfe\u5fdc\u306b\u306f\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u6d3b\u7528\u3082\u9078\u629e\u80a2\u306b\u306a\u308b<\/h2>\n<p>DMARC\u5bfe\u5fdc\u306e\u524d\u63d0\u3068\u306a\u308b\u306e\u306f\u3001SPF\u30fbDKIM\u306e\u6b63\u3057\u3044\u8a2d\u5b9a\u3068\u3001\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u6e80\u305f\u3059\u9001\u4fe1\u74b0\u5883\u306e\u6574\u5099\u3067\u3059\u3002\u30e1\u30eb\u30de\u30ac\u306a\u3069\u306e\u4e00\u6589\u914d\u4fe1\u3092\u884c\u3046\u4f01\u696d\u306e\u5834\u5408\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u5bfe\u5fdc\u3057\u305f\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u306e\u74b0\u5883\u3092\u6574\u3048\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3068\u306f<\/h3>\n<p>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3068\u306f\u3001\u591a\u6570\u306e\u5b9b\u5148\u3078\u540c\u6642\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u305f\u3081\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u3002\u5927\u898f\u6a21\u306a\u30e1\u30fc\u30eb\u9001\u4fe1\u306f\u30b9\u30d1\u30e0\u3068\u898b\u306a\u3055\u308c\u3084\u3059\u304f\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u3078\u306e\u632f\u308a\u5206\u3051\u3084\u4e0d\u9054\u304c\u767a\u751f\u3057\u304c\u3061\u3067\u3059\u304c\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306f\u5230\u9054\u7387\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u6280\u8853\u3068\u914d\u4fe1\u57fa\u76e4\u3092\u5099\u3048\u3066\u304a\u308a\u3001\u5927\u91cf\u306e\u30e1\u30fc\u30eb\u3092\u5b89\u5168\u306b\u914d\u4fe1\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u5bfe\u5fdc\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u9078\u3076\u30e1\u30ea\u30c3\u30c8<\/h3>\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u5bfe\u5fdc\u3057\u305f\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>SPF\u30fbDKIM\u306e\u8a2d\u5b9a\u3092\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u5074\u306e\u624b\u9806\u306b\u6cbf\u3063\u3066\u9032\u3081\u3089\u308c\u308b<\/li>\n<li>Gmail\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306a\u3069\u3001\u5909\u5316\u3059\u308b\u30d7\u30ed\u30d0\u30a4\u30c0\u8981\u4ef6\u306b\u914d\u4fe1\u57fa\u76e4\u5074\u304c\u5bfe\u5fdc\u3059\u308b<\/li>\n<li>\u8a8d\u8a3c\u306e\u901a\u3063\u305f\u914d\u4fe1\u74b0\u5883\u306b\u3088\u308a\u3001\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u3092\u7dad\u6301\u3057\u3084\u3059\u3044<\/li>\n<\/ul>\n<\/div>\n<p>DMARC\u904b\u7528\u306e\u524d\u63d0\u3068\u306a\u308b\u8a8d\u8a3c\u74b0\u5883\u3092\u81ea\u529b\u3067\u30bc\u30ed\u304b\u3089\u69cb\u7bc9\u3059\u308b\u306e\u306f\u8ca0\u62c5\u304c\u5927\u304d\u3044\u305f\u3081\u3001\u5b9f\u7e3e\u306e\u3042\u308b\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u6d3b\u7528\u3082\u9078\u629e\u80a2\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u304a\u3059\u3059\u3081\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300c\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u300d<\/h2>\n<p><a href=\"https:\/\/blastmail.jp\/\" target=\"_blank\" rel=\"noopener\"><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 wp-image-15955 size-full\" \/><\/a><\/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\uff08\u203b\uff09\u3092\u7372\u5f97\u3057\u3066\u3044\u308b\u65e5\u672c\u6700\u5927\u7d1a\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u3002\u5c0e\u5165\u5b9f\u7e3e\u306f27,000\u793e\u4ee5\u4e0a\u3002SPF\u30fbDKIM\u3068\u3044\u3063\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3084Gmail\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u5bfe\u5fdc\u3057\u305f\u914d\u4fe1\u57fa\u76e4\u3067\u3001\u30e1\u30eb\u30de\u30ac\u3084\u4e00\u6589\u914d\u4fe1\u3092\u78ba\u5b9f\u306b\u5c4a\u3051\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u5bfe\u7b56\uff08SPF\/DKIM\uff09<\/strong>\uff1a\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u5bfe\u5fdc\uff08DKIM\u306fStandard\u30d7\u30e9\u30f3\u4ee5\u4e0a\u3067\u5229\u7528\u53ef\u80fd\uff09<\/li>\n<li><strong>Gmail\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u5bfe\u5fdc<\/strong>\uff1a\u5909\u5316\u3059\u308b\u30d7\u30ed\u30d0\u30a4\u30c0\u8981\u4ef6\u306b\u5bfe\u5fdc\u3057\u305f\u914d\u4fe1\u74b0\u5883<\/li>\n<li><strong>\u52b9\u679c\u6e2c\u5b9a<\/strong>\uff1a\u958b\u5c01\u7387\u30fb\u30af\u30ea\u30c3\u30af\u7387\u30fb\u30a8\u30e9\u30fc\u30ab\u30a6\u30f3\u30c8\u3092\u78ba\u8a8d\u3067\u304d\u308b<\/li>\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u306a\u64cd\u4f5c\u6027<\/strong>\uff1a\u5c02\u9580\u77e5\u8b58\u304c\u306a\u304f\u3066\u3082\u76f4\u611f\u7684\u306b\u64cd\u4f5c\u3067\u304d\u308b\u7ba1\u7406\u753b\u9762<\/li>\n<\/ul>\n<\/div>\n<p>\u300cDMARC\u5bfe\u5fdc\u3092\u9032\u3081\u305f\u3044\u304c\u3001\u307e\u305a\u8a8d\u8a3c\u306b\u5bfe\u5fdc\u3057\u305f\u914d\u4fe1\u74b0\u5883\u3092\u6574\u3048\u305f\u3044\u300d\u3068\u3044\u3046\u4f01\u696d\u306b\u6700\u9069\u306a\u9078\u629e\u80a2\u3067\u3059\u3002\u7121\u6599\u30c8\u30e9\u30a4\u30a2\u30eb\u3067\u5b9f\u969b\u306e\u64cd\u4f5c\u611f\u3092\u8a66\u305b\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u4e00\u5ea6\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u516c\u5f0f\u30b5\u30a4\u30c8\uff1a<a href=\"https:\/\/blastmail.jp\/\" target=\"_blank\" rel=\"noopener\">\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<div class=\"su-button-center\"><a href=\"https:\/\/blastmail.jp\/order\/input\" class=\"su-button su-button-style-flat event_bnr\" style=\"color:#FFFFFF;background-color:#c12620;border-color:#9b1f1a;border-radius:5px\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"color:#FFFFFF;padding:0px 34px;font-size:25px;line-height:50px;border-color:#d46863;border-radius:5px;text-shadow:none\"> \u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u7121\u6599\u3067\u8a66\u3059 &gt;<\/span><\/a><\/div>\n<p>\u203b\u30df\u30c3\u30afIT\u30ea\u30dd\u30fc\u30c82025\u5e748\u6708\u53f7\u300c\u30af\u30e9\u30a6\u30c9\u578be\u30e1\u30fc\u30eb\u4e00\u6589\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306e\u5e02\u5834\u52d5\u5411\u3068\u4e2d\u671f\u4e88\u6e2c\uff08\u58f2\u4e0a\u9ad8\/\u30a2\u30af\u30c6\u30a3\u30d6\u6cd5\u4eba\u9867\u5ba2\u6570\uff09\u300d\u3088\u308a<\/p>\n<h2>\u304a\u3059\u3059\u3081\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300cblastengine\u300d<\/h2>\n<p><a href=\"https:\/\/blastengine.jp\/\" target=\"_blank\" rel=\"noopener\"><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 wp-image-19575 size-full\" \/><\/a><\/p>\n<p>blastengine\uff08\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\uff09\u306f\u3001\u304a\u5ba2\u69d8\u306e\u30b7\u30b9\u30c6\u30e0\u3068SMTP\u30ea\u30ec\u30fc\u3084API\u3067\u9023\u643a\u3057\u3066\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u3084\u4e00\u6589\u914d\u4fe1\u3092\u9ad8\u901f\u30fb\u78ba\u5b9f\u306b\u5c4a\u3051\u308b\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3067\u3059\u3002SPF\u30fbDKIM\u30fbDMARC\u3068\u3044\u3063\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u6a19\u6e96\u5bfe\u5fdc\u3057\u3066\u304a\u308a\u3001\u8a8d\u8a3c\u74b0\u5883\u306e\u69cb\u7bc9\u3092\u30b9\u30e0\u30fc\u30ba\u306b\u9032\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>SPF\/DKIM\/DMARC\u5bfe\u5fdc<\/strong>\uff1a\u6700\u65b0\u306e\u30e1\u30fc\u30eb\u8a8d\u8a3c\u6280\u8853\u306b\u6a19\u6e96\u5bfe\u5fdc\u3057\u3001\u306a\u308a\u3059\u307e\u3057\u30fb\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u3092\u56de\u907f<\/li>\n<li><strong>API\u9023\u643a\u30fbSMTP\u30ea\u30ec\u30fc<\/strong>\uff1a\u65e2\u5b58\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u7d44\u307f\u8fbc\u307f\u304c\u5bb9\u6613\u3067\u3001\u958b\u767a\u8005\u304c\u3059\u3050\u306b\u5c0e\u5165\u53ef\u80fd<\/li>\n<li><strong>IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u7ba1\u7406<\/strong>\uff1a\u914d\u4fe1\u57fa\u76e4\u306e\u904b\u7528\u30fb\u7ba1\u7406\u306fblastengine\u5074\u304c\u62c5\u3046\u305f\u3081\u3001\u5e38\u306b\u9ad8\u3044\u9001\u4fe1\u8005\u8a55\u4fa1\u3092\u7dad\u6301<\/li>\n<li><strong>99%\u4ee5\u4e0a\u306e\u9ad8\u3044\u5230\u9054\u7387<\/strong>\uff1a\u56fd\u5185\u30ad\u30e3\u30ea\u30a2\u30fbISP\u3078\u306e\u500b\u5225\u9001\u4fe1\u30ed\u30b8\u30c3\u30af\u3067\u78ba\u5b9f\u306b\u5c4a\u3051\u308b<\/li>\n<\/ul>\n<\/div>\n<p>\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u306e\u81ea\u52d5\u9001\u4fe1\u30e1\u30fc\u30eb\u3082\u542b\u3081\u3066DMARC\u6642\u4ee3\u306e\u8a8d\u8a3c\u8981\u4ef6\u3092\u6e80\u305f\u3057\u305f\u3044\u4f01\u696d\u3084\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u7ba1\u7406\u304b\u3089\u89e3\u653e\u3055\u308c\u305f\u3044\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002\u521d\u671f\u8cbb\u7528\u306f\u7121\u6599\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u5165\u529b\u3060\u3051\u3067\u30c8\u30e9\u30a4\u30a2\u30eb\u3092\u958b\u59cb\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\u516c\u5f0f\u30b5\u30a4\u30c8\uff1a<a href=\"https:\/\/blastengine.jp\/\" target=\"_blank\" rel=\"noopener\">https:\/\/blastengine.jp\/<\/a><\/p>\n<div class=\"su-button-center\"><a href=\"https:\/\/app.engn.jp\/be\/order\/request-form\" class=\"su-button su-button-style-flat event_bnr\" style=\"color:#FFFFFF;background-color:#c12620;border-color:#9b1f1a;border-radius:5px\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"color:#FFFFFF;padding:0px 34px;font-size:25px;line-height:50px;border-color:#d46863;border-radius:5px;text-shadow:none\"> blastengine\u3092\u7121\u6599\u3067\u8a66\u3059 &gt;<\/span><\/a><\/div>\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\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\u4f55\u3068\u8aad\u307f\u307e\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1aDMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u306f\u3001<strong>SPF\u30fbDKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u5229\u7528\u3057\u3066\u30e1\u30fc\u30eb\u306e\u306a\u308a\u3059\u307e\u3057\u3092\u9632\u3050\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853<\/strong>\u3067\u3059\u3002\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u53d6\u308a\u6271\u3044\uff08\u9694\u96e2\u30fb\u62d2\u5426\u306a\u3069\uff09\u3092\u9001\u4fe1\u5074\u304c\u6307\u5b9a\u3067\u304d\u3001\u8a8d\u8a3c\u7d50\u679c\u306e\u30ec\u30dd\u30fc\u30c8\u3082\u53d7\u3051\u53d6\u308c\u307e\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aSPF\u3084DKIM\u3068\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1aSPF\u306f\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3001DKIM\u306f\u96fb\u5b50\u7f72\u540d\u3067\u30e1\u30fc\u30eb\u3092\u691c\u8a3c\u3059\u308b\u6280\u8853\u3067\u3059\u3002DMARC\u306f\u3053\u306e2\u3064\u306e\u7d50\u679c\u3068<strong>\u53d7\u4fe1\u8005\u306b\u8868\u793a\u3055\u308c\u308b\u5dee\u51fa\u4eba\uff08\u30d8\u30c3\u30c0\u30fcFrom\uff09\u3068\u306e\u4e00\u81f4\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff09\u3092\u691c\u8a3c<\/strong>\u3057\u3001\u5931\u6557\u6642\u306e\u30dd\u30ea\u30b7\u30fc\u6307\u5b9a\u3068\u30ec\u30dd\u30fc\u30c8\u53d7\u4fe1\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aDMARC\u3060\u3051\u3092\u5358\u72ec\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u3067\u304d\u307e\u305b\u3093\u3002DMARC\u306f<strong>SPF\u307e\u305f\u306fDKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u524d\u63d0\u306b\u52d5\u4f5c\u3059\u308b<\/strong>\u305f\u3081\u3001\u5148\u306bSPF\u30fbDKIM\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e21\u65b9\u3092\u8a2d\u5b9a\u3057\u305f\u3046\u3048\u3067DMARC\u3092\u5c0e\u5165\u3059\u308b\u306e\u304c\u63a8\u5968\u3067\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aDMARC\u30dd\u30ea\u30b7\u30fc\u306f\u306a\u305cnone\u304b\u3089\u59cb\u3081\u308b\u3079\u304d\u306a\u306e\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u3044\u304d\u306a\u308aquarantine\u3084reject\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u3001<strong>\u8a2d\u5b9a\u6f0f\u308c\u306e\u3042\u308b\u6b63\u898f\u30e1\u30fc\u30eb\u307e\u3067\u9694\u96e2\u30fb\u62d2\u5426\u3055\u308c\u308b\u30ea\u30b9\u30af<\/strong>\u304c\u3042\u308b\u305f\u3081\u3067\u3059\u3002\u307e\u305anone\u3067\u30ec\u30dd\u30fc\u30c8\u3092\u53ce\u96c6\u3057\u3066\u9001\u4fe1\u7d4c\u8def\u3092\u3059\u3079\u3066\u6d17\u3044\u51fa\u3057\u3001\u6b63\u898f\u30e1\u30fc\u30eb\u304c\u8a8d\u8a3c\u306b\u5408\u683c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u6bb5\u968e\u7684\u306b\u5f37\u5316\u3057\u307e\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aDMARC\u306e\u8a2d\u5b9a\u304c\u6b63\u3057\u304f\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1aGmail\u306a\u3069DMARC\u5bfe\u5fdc\u30d7\u30ed\u30d0\u30a4\u30c0\u5b9b\u3066\u306b\u30c6\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u9001\u308a\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306e<strong>\u300cAuthentication-Results\u300d\u6b04\u3067dmarc=\u306e\u5024\u304c&#8221;pass&#8221;\u306b\u306a\u3063\u3066\u3044\u308c\u3070\u6b63\u5e38<\/strong>\u3067\u3059\u3002DNS\u3078\u306e\u767b\u9332\u81ea\u4f53\u306fnslookup\u30b3\u30de\u30f3\u30c9\u3067\u3082\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/dd>\n<dt class=\"blog-faq__question\">Q\uff1aDMARC\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u306a\u308a\u3059\u307e\u3057\u3092\u5b8c\u5168\u306b\u9632\u3052\u307e\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u9632\u3052\u308b\u306e\u306f\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u305d\u306e\u3082\u306e\u3092\u304b\u305f\u308b\u306a\u308a\u3059\u307e\u3057\u3067\u3059\u3002<strong>\u985e\u4f3c\u30c9\u30e1\u30a4\u30f3\u3084\u8868\u793a\u540d\u3060\u3051\u3092\u507d\u88c5\u3059\u308b\u624b\u53e3\u306b\u306f\u52b9\u679c\u304c\u306a\u3044<\/strong>\u305f\u3081\u3001\u53d7\u4fe1\u8005\u3078\u306e\u6ce8\u610f\u559a\u8d77\u306a\u3069\u4ed6\u306e\u5bfe\u7b56\u3068\u306e\u4f75\u7528\u304c\u5fc5\u8981\u3067\u3059\u3002<\/dd>\n<\/dl><\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>DMARC\u306f\u3001SPF\u30fbDKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3068\u30d8\u30c3\u30c0\u30fcFrom\u306e\u4e00\u81f4\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff09\u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u3067\u3001\u53d7\u4fe1\u8005\u306e\u76ee\u306b\u6620\u308b\u5dee\u51fa\u4eba\u306e\u507d\u88c5\u3092\u9632\u3050\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u3067\u3059\u3002\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u30dd\u30ea\u30b7\u30fc\u3092\u9001\u4fe1\u5074\u304c\u6307\u5b9a\u3067\u304d\u3001\u30ec\u30dd\u30fc\u30c8\u306b\u3088\u3063\u3066\u30c9\u30e1\u30a4\u30f3\u306e\u60aa\u7528\u72b6\u6cc1\u3092\u53ef\u8996\u5316\u3067\u304d\u308b\u70b9\u304c\u3001\u4ed6\u306e\u8a8d\u8a3c\u6280\u8853\u306b\u306f\u306a\u3044\u7279\u9577\u3067\u3059\u3002<\/p>\n<p>Gmail\u30fbYahoo!\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u3088\u3063\u3066DMARC\u5bfe\u5fdc\u306f\u3059\u3067\u306b\u5fc5\u9808\u306e\u9818\u57df\u306b\u5165\u3063\u3066\u304a\u308a\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u88ab\u5bb3\u304c\u9ad8\u6b62\u307e\u308a\u3059\u308b\u4e2d\u3001\u5bfe\u5fdc\u306e\u9045\u308c\u306f\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304c\u72d9\u308f\u308c\u308b\u30ea\u30b9\u30af\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002\u307e\u305a\u306fp=none\u3067\u306e\u30ec\u30b3\u30fc\u30c9\u516c\u958b\u3068\u30ec\u30dd\u30fc\u30c8\u53ce\u96c6\u304b\u3089\u59cb\u3081\u3001\u6bb5\u968e\u7684\u306b\u5bfe\u5fdc\u3092\u9032\u3081\u308b\u306e\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30e1\u30fc\u30eb\u914d\u4fe1\u306e\u73fe\u5834\u3067\u300cDMARC\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u76ee\u306b\u3059\u308b\u6a5f\u4f1a\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002SPF\u3084DKIM\u3068\u4e26\u3079\u3066\u8a9e\u3089&#8230;<\/p>\n","protected":false},"author":8,"featured_media":22444,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4312","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spam"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- 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