{"id":14072,"date":"2025-10-27T09:10:36","date_gmt":"2025-10-27T00:10:36","guid":{"rendered":"https:\/\/www.kagoya.jp\/howto\/?p=14072"},"modified":"2025-10-27T09:10:36","modified_gmt":"2025-10-27T00:10:36","slug":"authentication","status":"publish","type":"post","link":"https:\/\/www.kagoya.jp\/howto\/it-glossary\/mail\/authentication\/","title":{"rendered":"\u3010\u521d\u5fc3\u8005\u5411\u3051\u3011\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3068\u306f\uff1f5\u5206\u3067\u5206\u304b\u308b\u57fa\u790e\u77e5\u8b58\u3068\u5c0e\u5165\u30e1\u30ea\u30c3\u30c8"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/SenderDomainAuthentication.png\" alt=\"\" class=\"wp-image-14853\"\/><\/figure>\n\n\n\n<p>\u30d3\u30b8\u30cd\u30b9\u30b7\u30fc\u30f3\u3067\u5fc5\u8981\u4e0d\u53ef\u6b20\u306a\u30e1\u30fc\u30eb\u306f\u3001\u305d\u306e\u5229\u4fbf\u6027\u306e\u9670\u3067\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u3068\u547c\u3070\u308c\u308b\u60aa\u8cea\u306a\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u304c\u6025\u5897\u3057\u3066\u304a\u308a\u3001\u591a\u304f\u306e\u4f01\u696d\u304c\u6df1\u523b\u306a\u88ab\u5bb3\u306b\u76f4\u9762\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u8105\u5a01\u304b\u3089\u4f01\u696d\u8cc7\u7523\u3068\u4fe1\u983c\u3092\u5b88\u308b\u305f\u3081\u306b\u3001\u4eca\u300c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u300d\u306e\u5c0e\u5165\u304c\u5f37\u304f\u6c42\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3068\u306f\u4f55\u304b\u3001\u305d\u306e\u4ed5\u7d44\u307f\u3084\u5c0e\u5165\u306e\u30e1\u30ea\u30c3\u30c8\u3001\u5c0e\u5165\u65b9\u6cd5\u307e\u3067\u3092\u521d\u5fc3\u8005\u306e\u65b9\u306b\u3082\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"kh-cta\"><div class=\"entry-content\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full has-lightbox\"><a href=\"https:\/\/www.kagoya.jp\/lp\/mail_dmarc\/?argument=vqHX23Xs&amp;dmai=a658cdc207597e\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"728\" height=\"90\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/9b9e40675c8eac437bd1d036b26361aa-1.png\" alt=\"\" class=\"wp-image-14170\" srcset=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/9b9e40675c8eac437bd1d036b26361aa-1.png 728w, https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/9b9e40675c8eac437bd1d036b26361aa-1-300x37.png 300w\" sizes=\"(max-width: 728px) 100vw, 728px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p><\/p>\n<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3068\u306f\uff1f\u57fa\u672c\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/h2>\n\n\n\n<p>\u307e\u305a\u306f\u300c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u300d\u3068\u3044\u3046\u8a00\u8449\u306e\u57fa\u672c\u7684\u306a\u610f\u5473\u3068\u3001\u306a\u305c\u4eca\u3053\u306e\u6280\u8853\u304c\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30e1\u30fc\u30eb\u306e\u3084\u308a\u53d6\u308a\u304c\u5f53\u305f\u308a\u524d\u306b\u306a\u3063\u305f\u73fe\u4ee3\u306b\u304a\u3044\u3066\u3001\u305d\u306e\u5b89\u5168\u6027\u3092\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u78ba\u4fdd\u3057\u3066\u3044\u308b\u306e\u304b\u3002<br>\u305d\u3057\u3066\u300c\u306a\u308a\u3059\u307e\u3057\u300d\u3068\u3044\u3046\u8105\u5a01\u304c\u3069\u306e\u3088\u3046\u306b\u767a\u751f\u3057\u3001\u305d\u308c\u3092\u9632\u3050\u305f\u3081\u306b\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u304c\u3069\u306e\u3088\u3046\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u306e\u304b\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30fc\u30eb\u304c\u5c4a\u304f\u4ed5\u7d44\u307f\u3068\u300c\u306a\u308a\u3059\u307e\u3057\u300d\u304c\u767a\u751f\u3059\u308b\u539f\u56e0<\/h3>\n\n\n\n<p>\u30e1\u30fc\u30eb\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304c\u666e\u53ca\u3059\u308b\u4ee5\u524d\u304b\u3089\u5b58\u5728\u3059\u308b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308bSMTP\uff08Simple Mail Transfer Protocol\uff09\u306b\u57fa\u3065\u3044\u3066\u52d5\u4f5c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306eSMTP\u306f\u624b\u7d19\u3092\u9001\u308b\u30d7\u30ed\u30bb\u30b9\u306b\u4f8b\u3048\u308b\u3068\u3001\u624b\u7d19\u306b\u306f\u300c\u5dee\u51fa\u4eba\u300d\u306e\u540d\u524d\u3092\u81ea\u7531\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u3001\u30e1\u30fc\u30eb\u3082\u300cFrom:\u300d\u306b\u8868\u793a\u3055\u308c\u308b\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u3092\u3001\u6280\u8853\u7684\u306b\u306f<span class=\"kh-marker-red\">\u8ab0\u3067\u3082\u81ea\u7531\u306b\u8a2d\u5b9a\u3067\u304d\u3066\u3057\u307e\u3046<\/span>\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<br>\u3053\u306e\u4ed5\u7d44\u307f\u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u76f8\u624b\u540c\u58eb\u306e\u3084\u308a\u53d6\u308a\u3092\u524d\u63d0\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3066\u304a\u308a\u3001\u60aa\u610f\u306e\u3042\u308b\u5229\u7528\u8005\u304c\u73fe\u308c\u308b\u3053\u3068\u307e\u3067\u306f\u60f3\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3053\u306e<strong>\u300cFrom:\u300d\u3092\u81ea\u7531\u306b\u8a50\u79f0\u3067\u304d\u308b\u3068\u3044\u3046\u30e1\u30fc\u30eb\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7279\u6027<\/strong>\u3053\u305d\u304c\u3001\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u304c\u767a\u751f\u3059\u308b\u6839\u672c\u7684\u306a\u539f\u56e0\u3067\u3059\u3002\u672c\u6765\u306e\u9001\u4fe1\u8005\u3067\u306f\u306a\u3044\u7b2c\u4e09\u8005\u304c\u3001\u3042\u305f\u304b\u3082\u5b9f\u5728\u3059\u308b\u4f01\u696d\u3084\u4eba\u7269\u3001\u3042\u308b\u3044\u306f\u6709\u540d\u306a\u30b5\u30fc\u30d3\u30b9\u306b\u306a\u308a\u3059\u307e\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u5bb9\u6613\u306b\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/makenarisumasi.png\" alt=\"\" class=\"wp-image-11434\"\/><figcaption class=\"wp-element-caption\">\u7c21\u5358\u306a\u8a2d\u5b9a\u3067\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304c\u3067\u304d\u3066\u3057\u307e\u3046<\/figcaption><\/figure>\n\n\n\n<p>\u53d7\u4fe1\u8005\u5074\u304b\u3089\u898b\u308c\u3070\u3001\u4fe1\u983c\u3067\u304d\u308b\u9001\u4fe1\u5143\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306b\u898b\u3048\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u5b89\u6613\u306b\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u5c01\u3057\u305f\u308a\u3001\u60aa\u610f\u306e\u3042\u308b\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3057\u307e\u3063\u305f\u308a\u3059\u308b\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u8106\u5f31\u6027\u3092\u7a81\u3044\u305f\u653b\u6483\u304b\u3089\u79c1\u305f\u3061\u3092\u5b88\u308b\u305f\u3081\u306b\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u6280\u8853\u304c\u5fc5\u8981\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u5f79\u5272\uff1a\u9001\u4fe1\u8005\u306e\u8eab\u5143\u3092\u8a3c\u660e\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u8eab\u5206\u8a3c\u660e\u66f8<\/h3>\n\n\n\n<p>\u524d\u8ff0\u3067\u89e3\u8aac\u3057\u305f\u30e1\u30fc\u30eb\u306e\u69cb\u9020\u7684\u306a\u8106\u5f31\u6027\u3067\u3042\u308b\u3001\u300cFrom:\u300d\u30a2\u30c9\u30ec\u30b9\u304c\u5bb9\u6613\u306b\u8a50\u79f0\u3067\u304d\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u767b\u5834\u3057\u305f\u306e\u304c\u3001<strong>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u6280\u8853\u306e\u5f79\u5272\u3092\u4e00\u8a00\u3067\u8868\u3059\u306a\u3089\u3001\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u8eab\u5206\u8a3c\u660e\u66f8\u300d\u3068\u8003\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br>\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5143\u304c\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u5b9f\u969b\u306b\u5229\u7528\u3059\u308b\u6a29\u9650\u3092\u6301\u3064\u6b63\u5f53\u306a\u9001\u4fe1\u8005\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u3001<span class=\"kh-marker-blue\">\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u5ba2\u89b3\u7684\u306b\u691c\u8a3c\u3059\u308b\u4ed5\u7d44\u307f<\/span>\u3092\u63d0\u4f9b\u3059\u308b\u3082\u306e\u3067\u3059\u3002<br>\u5177\u4f53\u7684\u306b\u306f\u3001\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u6642\u306b\u3001\u305d\u306e\u30e1\u30fc\u30eb\u304c\u6b63\u898f\u306e\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u3089\u308c\u305f\u3082\u306e\u304b\u3001\u5185\u5bb9\u304c\u9014\u4e2d\u3067\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u306a\u3069\u3092\u3001\u8907\u6570\u306e\u6280\u8853\u7684\u306a\u624b\u6cd5\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u53d7\u4fe1\u8005\u306f\u300c\u3053\u306e\u30e1\u30fc\u30eb\u306f\u3001From:\u306b\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306e\u6240\u6709\u8005\u306b\u3088\u3063\u3066\u3001\u78ba\u304b\u306b\u9001\u4fe1\u3055\u308c\u305f\u3082\u306e\u3060\u300d\u3068\u3044\u3046\u78ba\u4fe1\u3092\u6301\u3063\u3066\u30e1\u30fc\u30eb\u3092\u53d7\u3051\u53d6\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7d50\u679c\u3068\u3057\u3066\u3001\u60aa\u610f\u306e\u3042\u308b\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u3092\u30d6\u30ed\u30c3\u30af\u3057\u305f\u308a\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u9694\u96e2\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u3001\u30e1\u30fc\u30eb\u74b0\u5883\u306e\u4fe1\u983c\u6027\u3068\u5b89\u5168\u6027\u304c\u98db\u8e8d\u7684\u306b\u5411\u4e0a\u3059\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u306a\u305c\u4eca\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u304c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/fake-mail.jpg\" alt=\"\" class=\"wp-image-14862\"\/><\/figure>\n\n\n\n<p>\u4eca\u65e5\u306e\u30d3\u30b8\u30cd\u30b9\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001\u30e1\u30fc\u30eb\u306f\u4f9d\u7136\u3068\u3057\u3066\u4f01\u696d\u306e\u751f\u547d\u7dda\u3067\u3042\u308a\u3001\u793e\u5185\u5916\u306e\u3042\u3089\u3086\u308b\u60c5\u5831\u4f1d\u9054\u306e\u4e2d\u5fc3\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u305d\u306e\u5229\u4fbf\u6027\u306e\u88cf\u5074\u3067\u3001\u30e1\u30fc\u30eb\u306f\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u4e3b\u8981\u306a\u7d4c\u8def\u3068\u3057\u3066\u3082\u60aa\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u3068\u547c\u3070\u308c\u308b\u624b\u53e3\u306f\u5de7\u5999\u5316\u306e\u4e00\u9014\u3092\u305f\u3069\u308a\u3001\u591a\u304f\u306e\u4f01\u696d\u306b\u3068\u3063\u3066\u770b\u904e\u3067\u304d\u306a\u3044\u6df1\u523b\u306a\u8105\u5a01\u3068\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5897\u52a0\u3059\u308b\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306e\u8105\u5a01\u3068\u30d3\u30b8\u30cd\u30b9\u3078\u306e\u5f71\u97ff<\/h3>\n\n\n\n<p>\u8fd1\u5e74\u3001\u4f01\u696d\u306e\u30e1\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u72d9\u3063\u305f\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306f\u5897\u52a0\u306e\u4e00\u9014\u3092\u305f\u3069\u3063\u3066\u304a\u308a\u3001\u7279\u306b\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306f\u6df1\u523b\u306a\u88ab\u5bb3\u3092\u3082\u305f\u3089\u3057\u3066\u3044\u307e\u3059\u3002\u72ec\u7acb\u884c\u653f\u6cd5\u4eba\u60c5\u5831\u51e6\u7406\u63a8\u9032\u6a5f\u69cb\uff08IPA\uff09\u306e\u5831\u544a\u306b\u3088\u308b\u3068\u3001\u6a19\u7684\u578b\u653b\u6483\u306e90%\u4ee5\u4e0a\u304c\u30e1\u30fc\u30eb\u3092\u901a\u3058\u3066\u884c\u308f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u660e\u3089\u304b\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/targetattackmail_catch.jpg\" class=\"kh-blog-card__image wp-post-image\" alt=\"\u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u3068\u306f\uff1f\u624b\u53e3\u3084\u898b\u5206\u3051\u65b9\u3001\u5bfe\u7b56\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/it-glossary\/mail\/targeted_attack\/\">\u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u3068\u306f\uff1f\u624b\u53e3\u3084\u898b\u5206\u3051\u65b9\u3001\u5bfe\u7b56\u307e\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u624b\u53e3\u306f\u591a\u69d8\u5316\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u306a\u304b\u3067\u3082\u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u306f\u975e\u5e38\u306b\u5de7\u5999\u3067\u88ab\u5bb3\u3092\u9632\u3050\u306e\u304c\u96e3\u3057\u3044\u7a2e\u985e\u3067\u3059\u3002\u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u306f\u653b\u6483\u5bfe\u8c61\u3092\u6b3a\u304f\u305f\u3081\u5de7\u5999\u306b\u4f5c\u308a\u3053\u307e\u308c\u3066\u304a\u308a\u3001\u4e8b\u524d\u306e\u77e5\u8b58\u304c\u306a\u3044\u3068\u7c21\u5358\u306b\u9a19\u3055\u308c\u3066\u3057\u307e\u3046\u3067\u3057\u3087\u3046\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u3068\u306f\u4f55\u304b\u3084\u305d\u306e\u624b\u53e3\u3001\u898b\u5206\u3051\u65b9\u3001\u5bfe\u7b56\u307e\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u5bfe\u7b56\u3092\u3059\u308c\u3070\u3001\u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u306e\u88ab\u5bb3\u3092\u9632\u3052\u308b\u3067\u3057\u3087\u3046\u3002 \u6a19\u7684\u578b\u653b\u6483\u30e1\u30fc\u30eb\u3068\u306f\uff1f|\u7279\u5b9a&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<p>\u653b\u6483\u8005\u306f\u3001\u5b9f\u5728\u3059\u308b\u4f01\u696d\u3084\u7d44\u7e54\u3001\u500b\u4eba\u306b\u306a\u308a\u3059\u307e\u3057\u3066\u60aa\u610f\u306e\u3042\u308b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3001\u53d7\u4fe1\u8005\u3092\u3060\u307e\u3057\u3066\u6a5f\u5bc6\u60c5\u5831\u3092\u7a83\u53d6\u3057\u305f\u308a\u3001\u91d1\u92ad\u3092\u3060\u307e\u3057\u53d6\u3063\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5177\u4f53\u7684\u306a\u624b\u53e3\u3068\u3057\u3066\u306f\u3001\u53d6\u5f15\u5148\u3084\u4e0a\u53f8\u306b\u306a\u308a\u3059\u307e\u3057\u3066\u507d\u306e\u8acb\u6c42\u66f8\u3092\u9001\u4ed8\u3057\u9001\u91d1\u3092\u4fc3\u3059\u300c\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u8a50\u6b3a\uff08BEC\uff09\u300d\u3084\u3001\u91d1\u878d\u6a5f\u95a2\u3084\u6709\u540d\u4f01\u696d\u306e\u3075\u308a\u3092\u3057\u3066\u507d\u30b5\u30a4\u30c8\u3078\u8a98\u5c0e\u3059\u308b\u300c\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u300d\u304c\u4ee3\u8868\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u653b\u6483\u306b\u5f15\u3063\u304b\u304b\u3063\u3066\u3057\u307e\u3046\u3068\u3001\u91d1\u92ad\u7684\u88ab\u5bb3\u306f\u3082\u3061\u308d\u3093\u306e\u3053\u3068\u3001\u9867\u5ba2\u30c7\u30fc\u30bf\u3084\u4f01\u696d\u79d8\u5bc6\u3068\u3044\u3063\u305f\u6a5f\u5bc6\u60c5\u5831\u306e\u6f0f\u6d29\u3001\u53d6\u5f15\u5148\u304b\u3089\u306e\u4fe1\u983c\u5931\u589c\u3001\u3055\u3089\u306b\u306f\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u306e\u8457\u3057\u3044\u4f4e\u4e0b\u3068\u3044\u3063\u305f\u3001\u8a08\u308a\u77e5\u308c\u306a\u3044\u640d\u5bb3\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u5ea6\u5931\u308f\u308c\u305f\u4fe1\u983c\u3092\u53d6\u308a\u623b\u3059\u306b\u306f\u9577\u3044\u6642\u9593\u3068\u591a\u5927\u306a\u52b4\u529b\u3092\u8981\u3059\u308b\u305f\u3081\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u306f\u55ab\u7dca\u306e\u8ab2\u984c\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/fishingmail_catch.png\" class=\"kh-blog-card__image wp-post-image\" alt=\"\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u3068\u306f\uff1f\u5b9f\u969b\u306e\u8a50\u6b3a\u306e\u624b\u53e3\u3084\u898b\u5206\u3051\u65b9\u3001\u5bfe\u7b56\u3092\u7d39\u4ecb\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/engineer\/communication\/fishingmail\/\">\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u3068\u306f\uff1f\u5b9f\u969b\u306e\u8a50\u6b3a\u306e\u624b\u53e3\u3084\u898b\u5206\u3051\u65b9\u3001\u5bfe\u7b56\u3092\u7d39\u4ecb<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u5e74\u3005\u5897\u52a0\u3059\u308b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u3092\u4f7f\u3063\u305f\u8a50\u6b3a\u306f\u3001\u305d\u306e\u6570\u3082\u3055\u308b\u3053\u3068\u306a\u304c\u3089\u5de7\u5999\u3055\u3082\u5897\u3057\u3066\u304d\u3066\u3044\u307e\u3059\u3002 \u4eca\u3067\u306f\u76ee\u8996\u3060\u3051\u3067\u306f\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u304b\u3069\u3046\u304b\u3092\u898b\u5206\u3051\u308b\u3053\u3068\u3082\u96e3\u3057\u304f\u30b1\u30fc\u30b9\u3082\u3042\u308b\u305f\u3081\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u5bfe\u7b56\u304c\u5fc5\u8981\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u305d\u3093\u306a\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u306b\u3064\u3044\u3066\u3001\u5b9f\u4f8b\u3092\u5143\u306b\u624b\u53e3\u3084\u898b\u5206\u3051\u65b9\u3001\u5bfe\u7b56\u306a\u3069\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002 Pick Up\u8a18\u4e8b\uff01 2024\u5e74\uff1aDMARC\u304c\u300c\u63a8\u5968\u300d\u3067\u306f\u306a\u304f\u300c\u5fc5\u9808\u8981\u4ef6\u300d\u306b\uff01&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<h3 class=\"wp-block-heading\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u4f01\u696d\u306e\u4fe1\u983c\u3092\u5b88\u308b\u305f\u3081\u306e\u5fc5\u9808\u5bfe\u7b56<\/h3>\n\n\n\n<p>\u524d\u8ff0\u3067\u3082\u3054\u7d39\u4ecb\u306e\u901a\u308a\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306f\u4f01\u696d\u306b\u3068\u3063\u3066\u81f4\u547d\u7684\u306a\u30c0\u30e1\u30fc\u30b8\u3092\u4e0e\u3048\u304b\u306d\u306a\u3044\u8105\u5a01\u3067\u3059\u3002\u3053\u3046\u3057\u305f\u72b6\u6cc1\u306b\u304a\u3044\u3066\u3001\u5358\u306a\u308b\u6280\u8853\u7684\u306a\u5bfe\u7b56\u306b\u7559\u307e\u3089\u305a\u3001\u4f01\u696d\u306e\u793e\u4f1a\u7684\u4fe1\u7528\u3068\u30d6\u30e9\u30f3\u30c9\u4fa1\u5024\u3092\u5b88\u308a\u3001\u9867\u5ba2\u3084\u53d6\u5f15\u5148\u3068\u306e\u63fa\u308b\u304e\u306a\u3044\u4fe1\u983c\u95a2\u4fc2\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u7d4c\u55b6\u4e0a\u306e\u5fc5\u9808\u8981\u4ef6\u3068\u3057\u3066<span class=\"kh-marker-blue\"><strong>\u300c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u300d<\/strong><\/span>\u306e\u5c0e\u5165\u304c\u9032\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\u4e0d\u6b63\u306a\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304c\u53d7\u4fe1\u8005\u306b\u5c4a\u304f\u30ea\u30b9\u30af\u3092\u5927\u5e45\u306b\u4f4e\u6e1b\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u5bfe\u7b56\u306f\u3001\u81ea\u793e\u304c\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u52a0\u5bb3\u8005\u3068\u306a\u3063\u305f\u308a\u3001\u9867\u5ba2\u3084\u53d6\u5f15\u5148\u304c\u88ab\u5bb3\u306b\u906d\u3046\u3053\u3068\u3092\u672a\u7136\u306b\u9632\u3050\u3060\u3051\u3067\u306a\u304f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u610f\u8b58\u306e\u9ad8\u3044\u4f01\u696d\u3068\u3057\u3066\u8a55\u4fa1\u3055\u308c\u3001\u5b89\u5b9a\u3057\u305f\u4e8b\u696d\u7d99\u7d9a\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u5c0e\u5165\u306f\u3001\u3082\u306f\u3084<strong><span class=\"kh-marker-yellow\">\u4f01\u696d\u306e\u793e\u4f1a\u7684\u8cac\u4efb<\/span><\/strong>\u3068\u8a00\u3063\u3066\u3082\u904e\u8a00\u3067\u306f\u306a\u3044\u307b\u3069\u306b\u91cd\u8981\u6027\u3092\u5897\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u4e3b\u306a3\u3064\u306e\u7a2e\u985e\u3068\u4ed5\u7d44\u307f<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/mail_security_catch-1024x538.jpg\" alt=\"\u30e1\u30fc\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\" class=\"wp-image-7157\" srcset=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/mail_security_catch-1024x538.jpg 1024w, https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/mail_security_catch-300x158.jpg 300w, https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/mail_security_catch.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u3001\u4e3b\u306bSPF\u3001DKIM\u3001DMARC\u3068\u3044\u30463\u7a2e\u985e\u306e\u6280\u8853\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6280\u8853\u306f\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u5bfe\u7b56\u306b\u8ca2\u732e\u3057\u3001\u4e92\u3044\u306b\u9023\u643a\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5f37\u56fa\u306a\u30e1\u30fc\u30eb\u8a8d\u8a3c\u4f53\u5236\u3092\u7bc9\u304f\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">SPF (Sender Policy Framework)\uff1a\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u691c\u8a3c<\/h3>\n\n\n\n<p>SPF\uff08Sender Policy Framework\uff09\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3092\u8a31\u53ef\u3055\u308c\u3066\u3044\u308b<span class=\"kh-marker-blue\"><strong>IP\u30a2\u30c9\u30ec\u30b9\u3092\u660e\u78ba\u306b\u6307\u5b9a<\/strong><\/span>\u3059\u308b\u3053\u3068\u3067\u3001\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u3092\u9632\u3050\u6280\u8853\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"593\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_2-2.jpg\" alt=\"SPF\u306e\u4ed5\u7d44\u307f\" class=\"wp-image-4958\" srcset=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_2-2.jpg 1024w, https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_2-2-300x174.jpg 300w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">SPF\u306e\u56f3\u89e3<\/figcaption><\/figure>\n<\/div>\n\n\n<p>SPF\u306e\u4ed5\u7d44\u307f\u3068\u3057\u3066\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u306eDNS\u8a2d\u5b9a\u306bSPF\u30ec\u30b3\u30fc\u30c9\u3068\u547c\u3070\u308c\u308b\u7279\u5225\u306aTXT\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3059\u308b\u3053\u3068\u3067\u6a5f\u80fd\u3057\u307e\u3059\u3002\u3053\u306eSPF\u30ec\u30b3\u30fc\u30c9\u306b\u306f\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u4f7f\u7528\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3092\u8a31\u53ef\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30db\u30b9\u30c8\u540d\u304c\u30ea\u30b9\u30c8\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300cv=spf1 ip4:XXX.XXX.XXX.XXX include:_spf.example.com ~all\u300d\u3068\u3044\u3063\u305f\u5f62\u5f0f\u3067\u8a18\u8ff0\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3057\u305f\u969b\u306b\u3001\u305d\u306e\u30e1\u30fc\u30eb\u306e\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\u30a2\u30c9\u30ec\u30b9\uff08SMTP\u901a\u4fe1\u6642\u306b\u4f7f\u7528\u3055\u308c\u308b\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\uff09\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304b\u3089\u3001\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304cSPF\u30ec\u30b3\u30fc\u30c9\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u8a18\u8f09\u3055\u308c\u3066\u3044\u308c\u3070\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u3068\u5224\u65ad\u3057\u3001\u8a18\u8f09\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u308a\u3059\u307e\u3057\u306e\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3068\u5224\u65ad\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p>SPF\u306e\u8a73\u7d30\u3084\u8a2d\u5b9a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202008b_catch.png\" class=\"kh-blog-card__image wp-post-image\" alt=\"SPF\u30ec\u30b3\u30fc\u30c9\u3068\u306f\uff1f\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3092\u5fb9\u5e95\u89e3\u8aac\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/it-glossary\/mail\/spf\/\">SPF\u30ec\u30b3\u30fc\u30c9\u3068\u306f\uff1f\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3092\u5fb9\u5e95\u89e3\u8aac<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u4f01\u696d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u507d\u88c5\u3057\u305f\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306b\u3088\u308b\u72af\u7f6a\u304c\u3001\u4e16\u754c\u4e2d\u3067\u767a\u751f\u3057\u3066\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u53d6\u5f15\u5148\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u88c5\u3063\u305f\u507d\u306e\u9001\u91d1\u6307\u793a\u30e1\u30fc\u30eb\u306b\u5f93\u3063\u3066\u304a\u91d1\u3092\u632f\u308a\u8fbc\u3093\u3067\u3057\u307e\u3063\u305f\u4f8b\u306a\u3069\u3001\u300c\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u300d\u8a50\u6b3a\u306e\u88ab\u5bb3\u5831\u544a\u3082\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002 \u305d\u3093\u306a\u306a\u304b\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u4e88\u9632\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u4ee3\u8868\u7684\u306a\u6280\u8853\u306e1\u3064\u304c\u3001DNS\u3092\u4f7f\u3063\u305fSPF\u3068\u3044\u3046\u6280\u8853\u3067\u3059\u3002\u6628\u4eca\u3067\u306fSPF\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3067\u3001\u81ea\u793e\u304b\u3089\u9001\u4fe1\u3057&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<p>\u3057\u304b\u3057\u3001SPF\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u5f31\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<br>\u6700\u3082\u9855\u8457\u306a\u306e\u306f\u3001\u30e1\u30fc\u30eb\u304c\u8ee2\u9001\u3055\u308c\u308b\u3068\u3001\u9014\u4e2d\u306e\u8ee2\u9001\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u9001\u4fe1\u5143\u3068\u307f\u306a\u3055\u308c\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u70b9\u3067\u3059\u3002\u307e\u305f\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306eFrom\u30a2\u30c9\u30ec\u30b9\uff08\u30e6\u30fc\u30b6\u30fc\u304c\u8a8d\u8b58\u3059\u308b\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\uff09\u306e\u691c\u8a3c\u306f\u884c\u308f\u308c\u306a\u3044\u305f\u3081\u3001\u30d8\u30c3\u30c0\u30fcFrom\u30a2\u30c9\u30ec\u30b9\u3092\u8a50\u79f0\u3057\u305f\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306b\u5bfe\u3057\u3066\u306f\u3001SPF\u3060\u3051\u3067\u306f\u5341\u5206\u306b\u5bfe\u5fdc\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u9650\u754c\u3082\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u5f31\u70b9\u3092\u88dc\u5b8c\u3059\u308b\u305f\u3081\u306b\u3001\u6b21\u306b\u8aac\u660e\u3059\u308bDKIM\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DKIM (DomainKeys Identified Mail)\uff1a\u96fb\u5b50\u7f72\u540d\u3067\u30e1\u30fc\u30eb\u306e\u6539\u3056\u3093\u3092\u691c\u77e5<\/h3>\n\n\n\n<p>DKIM\uff08DomainKeys Identified Mail\uff09\u306f\u3001\u30e1\u30fc\u30eb\u306b<span class=\"kh-marker-blue\"><strong>\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u4e0e<\/strong><\/span>\u3059\u308b\u3053\u3068\u3067\u3001\u9001\u4fe1\u9014\u4e2d\u306e\u30e1\u30fc\u30eb\u5185\u5bb9\u306e\u6539\u3056\u3093\u3092\u9632\u304e\u3001\u307e\u305f\u9001\u4fe1\u5143\u304c\u6b63\u5f53\u306a\u30c9\u30e1\u30a4\u30f3\u3067\u3042\u308b\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u6280\u8853\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"580\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_3-2.jpg\" alt=\"DKIM\u306e\u4ed5\u69d8\" class=\"wp-image-4959\" srcset=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_3-2.jpg 1024w, https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_3-2-300x170.jpg 300w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">DKIM\u306e\u56f3\u89e3<\/figcaption><\/figure>\n<\/div>\n\n\n<p>DKIM\u306f\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f\u3092\u57fa\u76e4\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5074\u306f\u3001\u79d8\u5bc6\u9375\u3092\u4f7f\u3063\u3066\u30e1\u30fc\u30eb\u306e\u7279\u5b9a\u306e\u30d8\u30c3\u30c0\u30fc\u60c5\u5831\u3068\u672c\u6587\u306e\u4e00\u90e8\u306b\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u4e0e\u3057\u307e\u3059\u3002\u3053\u306e\u79d8\u5bc6\u9375\u306f\u9001\u4fe1\u5074\u306e\u30b5\u30fc\u30d0\u30fc\u3067\u53b3\u91cd\u306b\u7ba1\u7406\u3055\u308c\u307e\u3059\u3002\u540c\u6642\u306b\u3001\u5bfe\u5fdc\u3059\u308b\u516c\u958b\u9375\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u306eDNS\u306bDKIM\u30ec\u30b3\u30fc\u30c9\uff08TXT\u30ec\u30b3\u30fc\u30c9\uff09\u3068\u3057\u3066\u516c\u958b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3057\u305f\u969b\u3001\u30e1\u30fc\u30eb\u306b\u4ed8\u4e0e\u3055\u308c\u305f\u96fb\u5b50\u7f72\u540d\u3068\u3001\u9001\u4fe1\u5143\u306e\u30c9\u30e1\u30a4\u30f3\u306eDNS\u306b\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u516c\u958b\u9375\u3092\u4f7f\u3063\u3066\u3001\u305d\u306e\u7f72\u540d\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002\u691c\u8a3c\u304c\u6210\u529f\u3059\u308c\u3070\u3001\u30e1\u30fc\u30eb\u304c\u9001\u4fe1\u4e2d\u306b\u6539\u3056\u3093\u3055\u308c\u3066\u304a\u3089\u305a\u3001\u307e\u305f\u6b63\u898f\u306e\u9001\u4fe1\u5143\u304b\u3089\u9001\u3089\u308c\u305f\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>DNS\u306bDKIM\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3059\u308b\u969b\u306f\u3001\u4f8b\u3048\u3070\u300cselector._domainkey.example.com\u300d\u306e\u3088\u3046\u306a\u5f62\u5f0f\u3067TXT\u30ec\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u3001\u516c\u958b\u9375\u306e\u60c5\u5831\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>DKIM\u306fSPF\u3068\u306f\u7570\u306a\u308a\u3001\u30e1\u30fc\u30eb\u306e\u5185\u5bb9\u81ea\u4f53\u306b\u7f72\u540d\u3092\u884c\u3046\u305f\u3081\u3001\u30e1\u30fc\u30eb\u8ee2\u9001\u306b\u3088\u3063\u3066\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u304c\u5909\u308f\u3063\u3066\u3082\u8a8d\u8a3c\u304c\u7834\u7dbb\u3057\u306b\u304f\u3044\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7279\u6027\u306b\u3088\u308a\u3001SPF\u306e\u5f31\u70b9\u3092\u88dc\u5b8c\u3057\u3001\u3088\u308a\u5f37\u56fa\u306a\u8a8d\u8a3c\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>DKIM\u306b\u3064\u3044\u3066\u3082\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u306b\u3066\u8a73\u7d30\u306a\u89e3\u8aac\u3092\u3057\u3066\u304a\u308a\u307e\u3059\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_catch-1.jpg\" class=\"kh-blog-card__image wp-post-image\" alt=\"\u3010\u56f3\u89e3\u3011DKIM\u3068\u306f\uff1fSPF\u3068\u306e\u9055\u3044\u3001\u6700\u65b0\u306eDMARC\u3082\uff01\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u306e\u4ed5\u7d44\u307f\u3092\u89e3\u8aac\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/it-glossary\/mail\/dkim\/\">\u3010\u56f3\u89e3\u3011DKIM\u3068\u306f\uff1fSPF\u3068\u306e\u9055\u3044\u3001\u6700\u65b0\u306eDMARC\u3082\uff01\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u306e\u4ed5\u7d44\u307f\u3092\u89e3\u8aac<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u500b\u4eba\u30fb\u4f01\u696d\u3092\u554f\u308f\u305a\u3001\u9001\u4fe1\u5143\u3092\u8a50\u79f0\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306b\u3088\u308b\u88ab\u5bb3\u304c\u5f8c\u3092\u7d76\u3061\u307e\u305b\u3093\u3002\u4e2d\u3067\u3082\u4f01\u696d\u3092\u5bfe\u8c61\u3068\u3057\u305f\u653b\u6483\u306e\u4e8b\u4f8b\u3067\u306f\u3001\u305d\u306e\u88ab\u5bb3\u984d\u304c\u751a\u5927\u306b\u306a\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u653b\u6483\u3092\u5bfe\u7b56\u3059\u308b\u305f\u3081\u306b\u306f\u3001DKIM\uff08\u30c7\u30a3\u30fc\u30ad\u30e0\uff09\u3084SPF\uff08\u30a8\u30b9\u30d4\u30fc\u30a8\u30d5\uff09\u30fbDMARC\uff08\u30c7\u30a3\u30fc\u30de\u30fc\u30af\uff09\u3068\u3044\u3063\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u3088\u308b\u5bfe\u7b56\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306fDKIM\u3068\u306f\u4f55\u304b\u3084\u3001\u53e4\u304f\u304b\u3089\u3042\u308bSPF\u3001\u6700\u65b0\u306eDMARC\u3068\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002 Pi&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<h3 class=\"wp-block-heading\">DMARC (Domain-based Message Authentication, Reporting, and Conformance)\uff1aSPF\u3068DKIM\u306e\u7d50\u679c\u3092\u57fa\u306b\u30e1\u30fc\u30eb\u306e\u51e6\u7406\u3092\u6307\u793a<\/h3>\n\n\n\n<p>DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09\u306f\u3001SPF\u3068DKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u3092\u7d71\u5408\u3057\u3001\u3055\u3089\u306b<span class=\"kh-marker-blue\"><strong>\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3069\u306e\u3088\u3046\u306b\u6271\u3046\u304b\uff08\u4f55\u3082\u3057\u306a\u3044\u3001\u9694\u96e2\u3001\u62d2\u5426\uff09\u3092\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u304c\u53d7\u4fe1\u5074\u306b\u6307\u793a\u3059\u308b\u305f\u3081\u306e\u30dd\u30ea\u30b7\u30fc\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/strong><\/span>\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"658\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_4-1.jpg\" alt=\"DMARC\u306e\u56f3\u89e3\" class=\"wp-image-4961\" srcset=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_4-1.jpg 1024w, https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202104a_4-1-300x193.jpg 300w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>DMARC\u306f\u3001SPF\u3068DKIM\u306e\u4e21\u65b9\u3001\u307e\u305f\u306f\u3069\u3061\u3089\u304b\u4e00\u65b9\u306e\u8a8d\u8a3c\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u91cd\u8981\u306a\u70b9\u3068\u3057\u3066\u3001DMARC\u306f\u300c\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u300d\u3068\u547c\u3070\u308c\u308b\u691c\u8a3c\u3092\u884c\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fcFrom\u30a2\u30c9\u30ec\u30b9\uff08\u30e6\u30fc\u30b6\u30fc\u306b\u898b\u3048\u308b\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\uff09\u3068\u3001SPF\u3067\u691c\u8a3c\u3057\u305f\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From\u30a2\u30c9\u30ec\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u3001\u307e\u305f\u306fDKIM\u3067\u7f72\u540d\u3055\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u30c1\u30a7\u30c3\u30af\u306b\u3088\u308a\u3001\u30d8\u30c3\u30c0\u30fcFrom\u30a2\u30c9\u30ec\u30b9\u306e\u8a50\u79f0\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>DMARC\u30dd\u30ea\u30b7\u30fc\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u306eDNS\u306bDMARC\u30ec\u30b3\u30fc\u30c9\uff08TXT\u30ec\u30b3\u30fc\u30c9\uff09\u3068\u3057\u3066\u8a2d\u5b9a\u3055\u308c\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306b\u5bfe\u3059\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u300cp=none\uff08\u76e3\u8996\u306e\u307f\uff09\u300d\u300cp=quarantine\uff08\u9694\u96e2\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u3078\uff09\u300d\u300cp=reject\uff08\u62d2\u5426\u3001\u53d7\u4fe1\u3057\u306a\u3044\uff09\u300d\u306e\u3044\u305a\u308c\u304b\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u306f\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u60aa\u7528\u3057\u305f\u4e0d\u6b63\u306a\u30e1\u30fc\u30eb\u304c\u3069\u306e\u3088\u3046\u306b\u6271\u308f\u308c\u308b\u304b\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/howtodmarc_catch.jpg\" class=\"kh-blog-card__image wp-post-image\" alt=\"DMARC\u3068\u306f?\u4ed5\u7d44\u307f\u3084\u30e1\u30ea\u30c3\u30c8\u3001\u5c0e\u5165\u65b9\u6cd5\u3092\u7d39\u4ecb\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/engineer\/communication\/dmarc\/\">DMARC\u3068\u306f?\u4ed5\u7d44\u307f\u3084\u30e1\u30ea\u30c3\u30c8\u3001\u5c0e\u5165\u65b9\u6cd5\u3092\u7d39\u4ecb<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5f37\u5316\u3092\u691c\u8a0e\u3057\u3066\u3044\u308b\u4f01\u696d\u3084\u500b\u4eba\u306f\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u3084\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306e\u5bfe\u7b56\u306b\u300cDMARC\u304c\u6709\u52b9\u300d\u3068\u3044\u3046\u60c5\u5831\u306b\u305f\u3069\u308a\u7740\u304b\u308c\u308b\u3068\u601d\u3044\u307e\u3059\u3002 \u66f4\u306bDMARC\u306fGoogle\u306e\u65b0\u3057\u3044\u30dd\u30ea\u30b7\u30fc\u306e\u5f71\u97ff\u306b\u3088\u308a\u3001\u672a\u5bfe\u5fdc\u306e\u72b6\u614b\u3067\u306fGmail\u3084Google Workspace\u5b9b\u306b\u30e1\u30fc\u30eb\u9001\u4fe1\u3057\u3066\u3082\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u632f\u308a\u5206\u3051\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002 \u3057\u304b\u3057\u3001\u305d\u3082\u305d\u3082DMARC\u3068\u306f\u4f55\u304b\u3068\u3044\u3046\u3068\u3053\u308d\u307e\u3067\u628a\u63e1&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<p>\u307e\u305f\u3001DMARC\u306b\u306f<strong>\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd<\/strong>\u304c\u3042\u308a\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3084\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306e\u7d71\u8a08\u60c5\u5831\u3092\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u7ba1\u7406\u8005\u306b\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30ec\u30dd\u30fc\u30c8\u3092\u5206\u6790\u3059\u308b\u3053\u3068\u3067\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304c\u60aa\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3001\u307e\u305f\u306f\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u306a\u3044\u304b\u306a\u3069\u3092\u8a73\u7d30\u306b\u628a\u63e1\u3067\u304d\u307e\u3059\u3002<br>\u3053\u308c\u306b\u3088\u308a\u3001\u96a0\u308c\u305f\u9001\u4fe1\u5143\uff08\u30b7\u30e3\u30c9\u30fcIT\uff09\u306e\u767a\u898b\u3084\u3001\u8a2d\u5b9a\u30df\u30b9\u306e\u7279\u5b9a\u3001\u305d\u3057\u3066\u7d99\u7d9a\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306e\u6539\u5584\u306b\u5f79\u7acb\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u4f01\u696d\u306e\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u614b\u52e2\u3092\u5f37\u5316\u3059\u308b\u4e0a\u3067\u4e0d\u53ef\u6b20\u306a\u30c4\u30fc\u30eb\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/dmarcreport_catch.png\" class=\"kh-blog-card__image wp-post-image\" alt=\"DMARC\u30ec\u30dd\u30fc\u30c8\u3068\u306f\u3002\u8a2d\u5b9a\u3084\u6d3b\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/engineer\/communication\/dmarcreport\/\">DMARC\u30ec\u30dd\u30fc\u30c8\u3068\u306f\u3002\u8a2d\u5b9a\u3084\u6d3b\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u4e00\u3064\u3067\u3042\u308bDMARC\u306b\u306f\u3001\u300cDMARC\u30ec\u30dd\u30fc\u30c8\u300d\u3068\u3044\u3046\u5b89\u5b9a\u3057\u305f\u30e1\u30fc\u30eb\u904b\u7528\u3092\u884c\u3063\u3066\u3044\u304f\u4e0a\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u6301\u3064\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002 DMARC\u306e\u5c0e\u5165\u307e\u3067\u306f\u5b8c\u4e86\u3057\u305f\u3068\u3044\u3046\u65b9\u3084\u4f01\u696d\u306f\u591a\u304f\u306a\u3063\u3066\u304d\u3066\u3044\u307e\u3059\u304c\u3001\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u306e\u6709\u52b9\u6d3b\u7528\u307e\u3067\u306f\u7740\u624b\u3067\u304d\u3066\u3044\u306a\u3044\u3068\u3044\u3046\u30b1\u30fc\u30b9\u3082\u591a\u304f\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u4eca\u56de\u306fDMARC\u30ec\u30dd\u30fc\u30c8\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3084\u6d3b\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002 Pick Up\u8a18\u4e8b\uff01 2024\u5e74\uff1aDM&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<h3 class=\"wp-block-heading\">\u3010\u4e00\u89a7\u8868\u3011SPF\u30fbDKIM\u30fbDMARC\u306e\u5f79\u5272\u3068\u9055\u3044<\/h3>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u8aac\u660e\u3057\u305fSPF\u3001DKIM\u3001DMARC\u306e3\u3064\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u306f\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u5bfe\u7b56\u306b\u8ca2\u732e\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u305d\u308c\u305e\u308c\u306e\u6280\u8853\u306e\u4e3b\u306a\u5f79\u5272\u3068\u7279\u5fb4\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u306e\u3067\u3001\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th>SPF <br>(Sender Policy Framework)<\/th><th>DKIM<br> (DomainKeys Identified Mail)<\/th><th>DMARC <br>(Domain-based Message Authentication, Reporting, and Conformance)<\/th><\/tr><\/thead><tbody><tr><td>\u4e3b\u306a\u5f79\u5272<\/td><td>\u6b63\u898f\u306e\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u30fc\u3092\u7279\u5b9a<\/td><td>\u30e1\u30fc\u30eb\u5185\u5bb9\u306e\u6539\u3056\u3093\u691c\u77e5\u3068\u9001\u4fe1\u5143\u306e\u6b63\u5f53\u6027\u8a3c\u660e<\/td><td>SPF\u3068DKIM\u306e\u8a8d\u8a3c\u7d50\u679c\u306b\u57fa\u3065\u304d\u51e6\u7406\u6307\u793a\u3001\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u3092\u63d0\u4f9b<\/td><\/tr><tr><td>\u691c\u8a3c\u306e\u4ed5\u7d44\u307f<\/td><td>\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3068DNS\u306eSPF\u30ec\u30b3\u30fc\u30c9\u3092\u7167\u5408<\/td><td>\u30e1\u30fc\u30eb\u306b\u4ed8\u4e0e\u3055\u308c\u305f\u96fb\u5b50\u7f72\u540d\u3092DNS\u306e\u516c\u958b\u9375\u3067\u691c\u8a3c<\/td><td>SPF\/DKIM\u306e\u7d50\u679c\u3068From\u30a2\u30c9\u30ec\u30b9\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u691c\u8a3c\u3057\u3001\u30dd\u30ea\u30b7\u30fc\u3092\u9069\u7528<\/td><\/tr><tr><td>\u5f31\u70b9\u30fb\u7279\u5fb4<\/td><td>\u30e1\u30fc\u30eb\u8ee2\u9001\u306b\u5f31\u3044\u3001\u30d8\u30c3\u30c0\u30fcFrom\u30a2\u30c9\u30ec\u30b9\u306e\u8a50\u79f0\u306b\u5bfe\u5fdc\u3067\u304d\u306a\u3044<\/td><td>\u30e1\u30fc\u30eb\u8ee2\u9001\u306b\u5f37\u3044\u3001\u7f72\u540d\u3055\u308c\u3066\u3044\u306a\u3044\u30e1\u30fc\u30eb\u306b\u306f\u7121\u529b<\/td><td>SPF\/DKIM\u306e\u5c0e\u5165\u304c\u524d\u63d0\u3001\u6bb5\u968e\u7684\u306a\u30dd\u30ea\u30b7\u30fc\u9069\u7528\u304c\u63a8\u5968<\/td><\/tr><tr><td>\u8a2d\u5b9a\u5834\u6240<\/td><td>DNS (TXT\u30ec\u30b3\u30fc\u30c9)<\/td><td>DNS (TXT\u30ec\u30b3\u30fc\u30c9)<\/td><td>DNS (TXT\u30ec\u30b3\u30fc\u30c9)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u5c0e\u5165\u3059\u308b4\u3064\u306e\u30e1\u30ea\u30c3\u30c8<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/meritimg.jpeg\" alt=\"\" class=\"wp-image-13317\"\/><\/figure>\n\n\n\n<p>\u5148\u306b\u3082\u3054\u7d39\u4ecb\u306e\u901a\u308a\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u306f\u5358\u306b\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30d3\u30b8\u30cd\u30b9\u5168\u4f53\u306b\u591a\u5c90\u306b\u308f\u305f\u308b\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3068\u3044\u3063\u305f\u76f4\u63a5\u7684\u306a\u8105\u5a01\u304b\u3089\u81ea\u793e\u3084\u9867\u5ba2\u3092\u5b88\u308b\u3053\u3068\u306f\u3082\u3061\u308d\u3093\u3001\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u5411\u4e0a\u3001\u4f01\u696d\u306e\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u5f37\u5316\u3001\u305d\u3057\u3066\u30e1\u30fc\u30eb\u9001\u4fe1\u72b6\u6cc1\u306e\u53ef\u8996\u5316\u3068\u5206\u6790\u3092\u901a\u3058\u3066\u3001\u3088\u308a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30e1\u30fc\u30eb\u904b\u7528\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30ea\u30c3\u30c81\uff1a\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304b\u3089\u81ea\u793e\u3068\u9867\u5ba2\u3092\u5b88\u308b<\/h3>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u5c0e\u5165\u3059\u308b\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u81ea\u793e\u304c\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306e<span class=\"kh-marker-blue\"><strong>\u88ab\u5bb3\u8005\u3001\u3042\u308b\u3044\u306f\u610f\u56f3\u305b\u305a\u52a0\u5bb3\u8005\u306b\u306a\u308b\u30ea\u30b9\u30af\u3092\u5927\u5e45\u306b\u8efd\u6e1b\u3067\u304d\u308b\u70b9<\/strong><\/span>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u60aa\u610f\u306e\u3042\u308b\u7b2c\u4e09\u8005\u306f\u3001\u5b9f\u5728\u3059\u308b\u4f01\u696d\u3084\u7d44\u7e54\u306b\u306a\u308a\u3059\u307e\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u308a\u3064\u3051\u3001\u53d7\u4fe1\u8005\u304b\u3089\u500b\u4eba\u60c5\u5831\u3084\u91d1\u92ad\u3092\u3060\u307e\u3057\u53d6\u308d\u3046\u3068\u3057\u307e\u3059\u3002\u3082\u3057\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304c\u60aa\u7528\u3055\u308c\u3001\u9867\u5ba2\u304c\u305d\u306e\u3088\u3046\u306a\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u306b\u3088\u3063\u3066\u88ab\u5bb3\u306b\u906d\u3063\u3066\u3057\u307e\u3063\u305f\u5834\u5408\u3001\u9867\u5ba2\u304b\u3089\u306e\u4fe1\u983c\u306f\u5931\u589c\u3057\u3001\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u306f\u8457\u3057\u304f\u50b7\u3064\u3044\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u30e1\u30fc\u30eb\u304c\u6b63\u898f\u306e\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u300c\u8eab\u5206\u8a3c\u660e\u66f8\u300d\u306e\u3088\u3046\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304c\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3067\u30d6\u30ed\u30c3\u30af\u3055\u308c\u308b\u305f\u3081\u3001\u9867\u5ba2\u3084\u53d6\u5f15\u5148\u304c\u507d\u30e1\u30fc\u30eb\u3092\u53d7\u3051\u53d6\u308b\u30ea\u30b9\u30af\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7d50\u679c\u3068\u3057\u3066\u3001<span class=\"kh-marker-yellow\"><strong>\u81ea\u793e\u306e\u9867\u5ba2\u60c5\u5831\u3084\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u3092\u5b88\u308a<\/strong><\/span>\u3001\u3072\u3044\u3066\u306f<span class=\"kh-marker-yellow\"><strong>\u81ea\u793e\u304c\u8a50\u6b3a\u884c\u70ba\u306e\u7247\u68d2\u3092\u62c5\u3050\u3068\u3044\u3046\u6700\u60aa\u306e\u4e8b\u614b\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u306b\u7e4b\u304c\u308b<\/strong><\/span>\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30ea\u30c3\u30c82\uff1a\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u304c\u5411\u4e0a\u3057\u3001\u30d3\u30b8\u30cd\u30b9\u30c1\u30e3\u30f3\u30b9\u3092\u9003\u3055\u306a\u3044<\/h3>\n\n\n\n<p>\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3044\u3066\u3001\u30e1\u30fc\u30eb\u306f\u9867\u5ba2\u3068\u306e\u91cd\u8981\u306a\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u30c4\u30fc\u30eb\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u304c\u76f8\u624b\u306b\u5c4a\u304b\u306a\u3051\u308c\u3070\u3001\u30d3\u30b8\u30cd\u30b9\u30c1\u30e3\u30f3\u30b9\u3092\u9003\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u306b\u3082\u306a\u308a\u304b\u306d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>Gmail\u3084Outlook\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u4e3b\u8981\u306a\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u5bfe\u7b56\u306e\u4e00\u74b0\u3068\u3057\u3066\u3001<strong><span style=\"text-decoration: underline;\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u6709\u7121<\/span><\/strong>\u3092\u9001\u4fe1\u8005\u8a55\u4fa1\u306e\u91cd\u8981\u306a\u6307\u6a19\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u304c\u9069\u5207\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f\u3001\u305f\u3068\u3048\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u3060\u3063\u305f\u3068\u3057\u3066\u3082\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u5224\u65ad\u3055\u308c\u3066<span class=\"kh-marker-red\"><strong>\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u632f\u308a\u5206\u3051\u3089\u308c\u305f\u308a\u3001\u6700\u60aa\u306e\u5834\u5408\u306f\u53d7\u4fe1\u3092\u62d2\u5426\u3055\u308c\u305f\u308a<\/strong><\/span>\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/2025outlook_catch.jpg\" class=\"kh-blog-card__image wp-post-image\" alt=\"\u30102025\u5e744\u6708\u3011Outlook\u306e\u65b0\u3057\u3044\u96fb\u5b50\u30e1\u30fc\u30eb\u8a8d\u8a3c\u8981\u4ef6\u306b\u3064\u3044\u3066\u5185\u5bb9\u3084\u6ce8\u610f\u70b9\u306a\u3069\u3092\u89e3\u8aac\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/engineer\/communication\/2025outlook\/\">\u30102025\u5e744\u6708\u3011Outlook\u306e\u65b0\u3057\u3044\u96fb\u5b50\u30e1\u30fc\u30eb\u8a8d\u8a3c\u8981\u4ef6\u306b\u3064\u3044\u3066\u5185\u5bb9\u3084\u6ce8\u610f\u70b9\u306a\u3069\u3092\u89e3\u8aac<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">2025\u5e744\u6708\u306b\u884c\u308f\u308c\u305fMicrosoft Outlook\u306e\u65b0\u3057\u3044\u96fb\u5b50\u30e1\u30fc\u30eb\u8a8d\u8a3c\u8981\u4ef6\u306e\u767a\u8868\u306b\u3088\u308a\u3001\u4eca\u5f8c\u306e\u30e1\u30fc\u30eb\u904b\u7528\u306e\u5bfe\u7b56\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3057\u305f\u3002 \u4e00\u90e8\u306e\u30e1\u30fc\u30eb\u904b\u7528\u8005\u306f\u3053\u306e\u65b0\u3057\u3044\u8981\u4ef6\u306b\u3088\u308a\u3001\u696d\u52d9\u306b\u5927\u304d\u306a\u5f71\u97ff\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3054\u3056\u3044\u307e\u3059\u3002 \u305d\u3053\u3067\u3001\u672c\u8a18\u4e8b\u3067\u306fOutlook\u3078\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u304c\u6a5f\u80fd\u3057\u306a\u304f\u306a\u308b\u524d\u306b\u5fc5\u8981\u306a\u5bfe\u7b56\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3044\u305f\u3057\u307e\u3059\u3002 4\u6708\u306b\u884c\u308f\u308c\u305fOutlook\u306e\u65b0\u3057\u3044\u8981\u4ef6\u306b\u3064\u3044\u3066 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href=\"https:\/\/www.kagoya.jp\/lp\/mail_dmarc\/?argument=vqHX23Xs&amp;dmai=a658cdc207597e&amp;_fsi=9gB7GRfc\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u56fd\u7523\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc<\/a><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30c6\u30c3\u30d71\uff1a\u73fe\u72b6\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u74b0\u5883\u3092\u628a\u63e1\u3059\u308b<\/h3>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u5c0e\u5165\u3059\u308b\u4e0a\u3067\u3001\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u6700\u3082\u91cd\u8981\u3068\u306a\u308b\u306e\u304c\u3001\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3044\u308b\u5168\u3066\u306e\u30b7\u30b9\u30c6\u30e0\u3084\u30b5\u30fc\u30d3\u30b9\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u793e\u5185\u3067\u904b\u7528\u3057\u3066\u3044\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u3082\u3061\u308d\u3093\u306e\u3053\u3068\u3001\u5916\u90e8\u306e\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d3\u30b9\u3084SaaS\uff08Software as a Service\uff09\u3067\u30e1\u30fc\u30eb\u9001\u4fe1\u6a5f\u80fd\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u3082\u306e\u3082\u542b\u307e\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30c4\u30fc\u30eb\u3001\u9867\u5ba2\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\uff08CRM\uff09\u3001\u7d4c\u7406\u30b7\u30b9\u30c6\u30e0\u3001\u63a1\u7528\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u304c\u8a72\u5f53\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u306f\u975e\u5e38\u306b\u591a\u3044\u305f\u3081\u3001\u898b\u843d\u3068\u3057\u304c\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u73fe\u72b6\u628a\u63e1\u3092\u6020\u308b\u3068\u3001\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u5143\u304cSPF\u3084DKIM\u306e\u8a8d\u8a3c\u8a2d\u5b9a\u304b\u3089\u6f0f\u308c\u3066\u3057\u307e\u3044\u3001\u305d\u306e\u7d50\u679c\u3001\u9867\u5ba2\u3084\u53d6\u5f15\u5148\u3078\u91cd\u8981\u306a\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u6df1\u523b\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4e88\u671f\u305b\u306c\u30e1\u30fc\u30eb\u306e\u4e0d\u9054\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u6a5f\u4f1a\u306e\u640d\u5931\u3084\u4fe1\u983c\u306e\u4f4e\u4e0b\u306b\u76f4\u7d50\u3057\u304b\u306d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u306a\u304a\u3001DMARC\u306e\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u306f\u3001\u3053\u306e\u68da\u5378\u3057\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u304a\u3044\u3066\u3082\u5927\u3044\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002DMARC\u3092\u5c0e\u5165\u3057\u3001\u3057\u3070\u3089\u304f\u69d8\u5b50\u3092\u898b\u308b\u3053\u3068\u3067\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u5143\uff08\u6b63\u5f53\u306a\u3082\u306e\u3001\u305d\u3046\u3067\u306a\u3044\u3082\u306e\u3092\u542b\u3080\uff09\u3092\u30ec\u30dd\u30fc\u30c8\u3067\u53ef\u8996\u5316\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u73fe\u72b6\u306e\u74b0\u5883\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30c6\u30c3\u30d72\uff1aDNS\u306bSPF\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3059\u308b<\/h3>\n\n\n\n<p>\u30b9\u30c6\u30c3\u30d71\u3067\u6d17\u3044\u51fa\u3057\u305f\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u6b63\u5f53\u306a\u30b5\u30fc\u30d0\u30fc\u306e\u60c5\u5831\u3092\u3082\u3068\u306b\u3001SPF\u30ec\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u3001\u30c9\u30e1\u30a4\u30f3\u3092\u7ba1\u7406\u3057\u3066\u3044\u308bDNS\uff08Domain Name System\uff09\u306b\u767b\u9332\u3057\u307e\u3059\u3002SPF\u30ec\u30b3\u30fc\u30c9\u306f\u3001DNS\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u8a18\u8ff0\u3055\u308c\u3001\u300cv=spf1\u300d\u3067\u59cb\u307e\u308a\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u3092\u8a31\u53ef\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u3084\u30db\u30b9\u30c8\u540d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5177\u4f53\u7684\u306a\u8a18\u8ff0\u65b9\u6cd5\u3068\u3057\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u3066\u304a\u308a\u307e\u3059\u306e\u3067\u3001\u8a2d\u5b9a\u3092\u884c\u308f\u308c\u308b\u969b\u306b\u3054\u5229\u7528\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\t\t<div class=\"kh-blog-card\">\n\t\t\t\t\t\t\t<figure class=\"kh-blog-card__thumbnail\">\n\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/www.kagoya.jp\/howto\/wp-content\/uploads\/202008b_catch.png\" class=\"kh-blog-card__image wp-post-image\" alt=\"SPF\u30ec\u30b3\u30fc\u30c9\u3068\u306f\uff1f\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3092\u5fb9\u5e95\u89e3\u8aac\" \/>\t\t\t\t<\/figure>\n\t\t\t\t\t\t<div class=\"kh-blog-card__text\">\n\t\t\t\t<p class=\"kh-blog-card__title\"><a href=\"https:\/\/www.kagoya.jp\/howto\/it-glossary\/mail\/spf\/\">SPF\u30ec\u30b3\u30fc\u30c9\u3068\u306f\uff1f\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3092\u5fb9\u5e95\u89e3\u8aac<\/a><\/p>\n\t\t\t\t<p class=\"kh-blog-card__description\">\u4f01\u696d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u507d\u88c5\u3057\u305f\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306b\u3088\u308b\u72af\u7f6a\u304c\u3001\u4e16\u754c\u4e2d\u3067\u767a\u751f\u3057\u3066\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u53d6\u5f15\u5148\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u88c5\u3063\u305f\u507d\u306e\u9001\u91d1\u6307\u793a\u30e1\u30fc\u30eb\u306b\u5f93\u3063\u3066\u304a\u91d1\u3092\u632f\u308a\u8fbc\u3093\u3067\u3057\u307e\u3063\u305f\u4f8b\u306a\u3069\u3001\u300c\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u300d\u8a50\u6b3a\u306e\u88ab\u5bb3\u5831\u544a\u3082\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002 \u305d\u3093\u306a\u306a\u304b\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u4e88\u9632\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u4ee3\u8868\u7684\u306a\u6280\u8853\u306e1\u3064\u304c\u3001DNS\u3092\u4f7f\u3063\u305fSPF\u3068\u3044\u3046\u6280\u8853\u3067\u3059\u3002\u6628\u4eca\u3067\u306fSPF\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3067\u3001\u81ea\u793e\u304b\u3089\u9001\u4fe1\u3057&hellip;<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30c6\u30c3\u30d73\uff1aDNS\u306bDKIM\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3059\u308b<\/h3>\n\n\n\n<p>DKIM\u3092\u8a2d\u5b9a\u3059\u308b\u624b\u9806\u306f\u3001DKIM\u306e\u9375\u30da\u30a2\uff08\u79d8\u5bc6\u9375\u3068\u516c\u958b\u9375\uff09\u3092\u751f\u6210\u3057\u3001\u79d8\u5bc6\u9375\u3067\u30e1\u30fc\u30eb\u306b\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u4e0e\u3059\u308b\u3088\u3046\u306b\u30b5\u30fc\u30d0\u30fc\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u3057\u3066\u3001\u516c\u958b\u9375\u306fDNS\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u767b\u9332\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3067\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306b\u542b\u307e\u308c\u308bDKIM\u7f72\u540d\u3068\u3001DNS\u306b\u767b\u9332\u3055\u308c\u305f\u516c\u958b\u9375\u3092\u4f7f\u3063\u3066\u3001\u30e1\u30fc\u30eb\u304c\u9001\u4fe1\u4e2d\u306b\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3001\u305d\u3057\u3066\u78ba\u304b\u306b\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u3082\u306e\u3067\u3042\u308b\u304b\u3092\u691c\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30c6\u30c3\u30d74\uff1aDMARC\u3092\u5c0e\u5165\u3057\u3001\u6bb5\u968e\u7684\u306b\u30dd\u30ea\u30b7\u30fc\u3092\u5f37\u5316\u3059\u308b<\/h3>\n\n\n\n<p>SPF\u3068DKIM\u306e\u8a2d\u5b9a\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u3044\u3088\u3044\u3088DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09\u306e\u5c0e\u5165\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u9001\u4fe1\u5074\u3067DMARC\u306e\u8a2d\u5b9a\u3092\u884c\u3046\u305f\u3081\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30dd\u30ea\u30b7\u30fc\u30ec\u30b3\u30fc\u30c9\u3092DNS\u30b5\u30fc\u30d0\u30fc\u306eTXT\u30ec\u30b3\u30fc\u30c9\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>_dmarc.kagoya.jp.\u3000\u3000IN TXT\u3000 \u201cv=DMARC1; p=none; rua=mailto:example@kagoya.jp; ruf=mailto:ng_example@kagoya.jp \u201c<\/code><\/pre>\n\n\n\n<p class=\"has-red-color has-text-color has-link-color has-small-font-size wp-elements-66f8455391ed52180c85dc2cc6f480b2\">\u203b\u4e0a\u8a18\u306fkagoya.jp\u306bnone\uff08\u76e3\u8996\u306e\u307f\uff09\u3067\u30dd\u30ea\u30b7\u30fc\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306e\u8a18\u8ff0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>DMARC\u3092\u5c0e\u5165\u3059\u308b\u969b\u306e\u9244\u5247\u306f\u3001\u3044\u304d\u306a\u308a\u53b3\u3057\u3044\u30dd\u30ea\u30b7\u30fc\u3092\u9069\u7528\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001<strong><span class=\"kh-marker-blue\">\u6bb5\u968e\u7684\u306b\u5f37\u5316<\/span><\/strong>\u3057\u3066\u3044\u304f\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u8aa4\u3063\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3057\u307e\u3046\u30ea\u30b9\u30af\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u304c\u3089\u3001\u5b89\u5168\u6027\u3092\u9ad8\u3081\u3066\u3044\u304f\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">DMARC\u30dd\u30ea\u30b7\u30fc\u306e\u6bb5\u968e\u7684\u306a\u9069\u7528\uff08none\u2192quarantine\u2192reject\uff09<\/h4>\n\n\n\n<p>DMARC\u30dd\u30ea\u30b7\u30fc\u3092\u5b89\u5168\u306b\u5f37\u5316\u3057\u3066\u3044\u304f\u305f\u3081\u306b\u306f\u3001\u300cnone\u300d\u300cquarantine\u300d\u300creject\u300d\u306e3\u3064\u306e\u6bb5\u968e\u3092\u9806\u306b\u9032\u3081\u308b\u3053\u3068\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u307e\u305a\u3001DMARC\u5c0e\u5165\u306e\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u30dd\u30ea\u30b7\u30fc\u3092\u300cp=none\u300d\u3001\u3064\u307e\u308a\u300c\u76e3\u8996\u30e2\u30fc\u30c9\u300d\u3067\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u30e2\u30fc\u30c9\u3067\u306f\u3001SPF\u3084DKIM\u306e\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3067\u3042\u3063\u3066\u3082\u3001\u53d7\u4fe1\u5074\u30b5\u30fc\u30d0\u30fc\u306f\u305d\u306e\u30e1\u30fc\u30eb\u3092\u30d6\u30ed\u30c3\u30af\u3057\u305f\u308a\u9694\u96e2\u3057\u305f\u308a\u305b\u305a\u3001\u901a\u5e38\u901a\u308a\u914d\u4fe1\u3057\u307e\u3059\u3002<br>\u3053\u306e\u671f\u9593\u4e2d\u306bDMARC\u30ec\u30dd\u30fc\u30c8\u3092\u53ce\u96c6\u30fb\u5206\u6790\u3059\u308b\u3053\u3068\u3067\u3001\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30e1\u30fc\u30eb\u304c\u6b63\u3057\u304f\u8a8d\u8a3c\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3001\u4e88\u671f\u305b\u306c\u9001\u4fe1\u5143\u304b\u3089\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u3066\u3044\u306a\u3044\u304b\u3068\u3044\u3063\u305f\u73fe\u72b6\u3092\u628a\u63e1\u3057\u3001\u5fc5\u8981\u306a\u8a2d\u5b9a\u4fee\u6b63\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u300cp=none\u300d\u306e\u671f\u9593\u306f\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u8aa4\u3063\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u308b\u3053\u3068\u3092\u9632\u3050\u305f\u3081\u306e\u3001\u975e\u5e38\u306b\u91cd\u8981\u306a\u6e96\u5099\u671f\u9593\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u300cp=none\u300d\u306e\u76e3\u8996\u671f\u9593\u3092\u7d4c\u3066\u3001\u3059\u3079\u3066\u306e\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304cSPF\u304a\u3088\u3073DKIM\u8a8d\u8a3c\u3092\u901a\u904e\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u305f\u3089\u3001\u6b21\u306b\u30dd\u30ea\u30b7\u30fc\u3092\u300cp=quarantine\u300d\uff08\u9694\u96e2\u30e2\u30fc\u30c9\uff09\u306b\u79fb\u884c\u3057\u307e\u3059\u3002\u3053\u306e\u30dd\u30ea\u30b7\u30fc\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001SPF\u307e\u305f\u306fDKIM\u306e\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306f\u3001\u53d7\u4fe1\u5074\u30b5\u30fc\u30d0\u30fc\u306b\u3088\u3063\u3066\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u632f\u308a\u5206\u3051\u3089\u308c\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u9694\u96e2\u3055\u308c\u307e\u3059\u3002<br>\u3053\u306e\u6bb5\u968e\u3067\u3082\u3001DMARC\u30ec\u30dd\u30fc\u30c8\u3092\u7d99\u7d9a\u7684\u306b\u76e3\u8996\u3057\u3001\u4e07\u304c\u4e00\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304c\u8aa4\u3063\u3066\u9694\u96e2\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u306e\u300cp=quarantine\u300d\u306e\u671f\u9593\u306f\u3001\u4e0d\u6b63\u306a\u30e1\u30fc\u30eb\u306e\u53d7\u4fe1\u3092\u6e1b\u3089\u3057\u3064\u3064\u3082\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u306e\u8aa4\u30d6\u30ed\u30c3\u30af\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u8fc5\u901f\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u4f59\u5730\u3092\u6b8b\u3059\u3001\u4e2d\u9593\u7684\u306a\u6bb5\u968e\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u7d42\u76ee\u6a19\u306f\u300cp=reject\u300d\uff08\u62d2\u5426\u30e2\u30fc\u30c9\uff09\u3078\u306e\u79fb\u884c\u3067\u3059\u3002\u5341\u5206\u306a\u76e3\u8996\u671f\u9593\u3068\u6539\u5584\u3092\u7d4c\u3066\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u306e\u8aa4\u30d6\u30ed\u30c3\u30af\u304c\u5b8c\u5168\u306b\u89e3\u6d88\u3055\u308c\u305f\u3068\u78ba\u4fe1\u3067\u304d\u305f\u6642\u70b9\u3067\u3001DMARC\u30dd\u30ea\u30b7\u30fc\u3092\u300cp=reject\u300d\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u30dd\u30ea\u30b7\u30fc\u304c\u9069\u7528\u3055\u308c\u308b\u3068\u3001SPF\u307e\u305f\u306fDKIM\u306e\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306f\u3001\u53d7\u4fe1\u5074\u30b5\u30fc\u30d0\u30fc\u306b\u3088\u3063\u3066\u5b8c\u5168\u306b\u62d2\u5426\u3055\u308c\u3001\u53d7\u4fe1\u8005\u306e\u5143\u3078\u306f\u4e00\u5207\u5c4a\u304b\u306a\u304f\u306a\u308a\u307e\u3059\u3002<br>\u3053\u308c\u306b\u3088\u308a\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u3092\u60aa\u7528\u3057\u305f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3084\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3092\u6700\u3082\u5f37\u529b\u306a\u5f62\u3067\u9632\u3050\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306bDMARC\u30dd\u30ea\u30b7\u30fc\u3092\u6bb5\u968e\u7684\u306b\u9069\u7528\u3057\u3066\u3044\u304f\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u6700\u5927\u9650\u306b\u9ad8\u3081\u306a\u304c\u3089\u3001\u30d3\u30b8\u30cd\u30b9\u3078\u306e\u5f71\u97ff\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u305f\u3081\u306e\u4e0d\u53ef\u6b20\u306a\u6226\u7565\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u73fe\u4ee3\u306e\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3044\u3066\u3001\u30e1\u30fc\u30eb\u306f\u4e0d\u53ef\u6b20\u306a\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u624b\u6bb5\u3067\u3042\u308b\u3068\u540c\u6642\u306b\u3001\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u4e3b\u8981\u306a\u7d4c\u8def\u3067\u3082\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u8a50\u6b3a\u3068\u3044\u3063\u305f\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u306e\u8105\u5a01\u306f\u5f8c\u3092\u7d76\u305f\u305a\u3001\u4f01\u696d\u306b\u3068\u3063\u3066\u55ab\u7dca\u306e\u8ab2\u984c\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8105\u5a01\u304b\u3089\u81ea\u793e\u3084\u9867\u5ba2\u3092\u5b88\u308b\u305f\u3081\u306b\u306f\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u5c0e\u5165\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u3001\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5143\u304c\u6b63\u5f53\u3067\u3042\u308b\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u6280\u8853\u306e\u96c6\u5408\u4f53\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u691c\u8a3c\u3059\u308b\u300cSPF\u300d\u3001\u96fb\u5b50\u7f72\u540d\u3067\u30e1\u30fc\u30eb\u306e\u6539\u3056\u3093\u3092\u9632\u3050\u300cDKIM\u300d\u3001\u305d\u3057\u3066\u3053\u308c\u3089\u306e\u7d50\u679c\u3092\u7d71\u5408\u3057\u3001\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u30dd\u30ea\u30b7\u30fc\u3092\u6307\u793a\u3059\u308b\u300cDMARC\u300d\u3068\u3044\u30463\u3064\u306e\u6280\u8853\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5f37\u56fa\u306a\u9632\u5fa1\u7db2\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u8a8d\u8a3c\u6280\u8853\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5f37\u5316\u306f\u3082\u3061\u308d\u3093\u306e\u3053\u3068\u3001\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u5411\u4e0a\u3001\u3072\u3044\u3066\u306f\u4f01\u696d\u306e\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u3068\u793e\u4f1a\u7684\u4fe1\u7528\u306e\u7dad\u6301\u30fb\u5411\u4e0a\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002DMARC\u306e\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308c\u3070\u3001\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u308b\u30e1\u30fc\u30eb\u306e\u72b6\u6cc1\u3092\u53ef\u8996\u5316\u3057\u3001\u7d99\u7d9a\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6539\u5584\u306b\u5f79\u7acb\u3066\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u5c0e\u5165\u306f\u3001\u8907\u96d1\u306b\u611f\u3058\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u307e\u305a\u306f\u81ea\u793e\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u74b0\u5883\u306e\u73fe\u72b6\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3059\u308b\u3053\u3068\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u3001DMARC\u30dd\u30ea\u30b7\u30fc\u3092\u300cnone\u300d\u304b\u3089\u6bb5\u968e\u7684\u306b\u9069\u7528\u3057\u3066\u3044\u304f\u3053\u3068\u3067\u3001\u696d\u52d9\u3078\u306e\u5f71\u97ff\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u304c\u3089\u5b89\u5168\u306a\u30e1\u30fc\u30eb\u74b0\u5883\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u6a5f\u4f1a\u306b\u3001\u305c\u3072\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u5c0e\u5165\u3092\u691c\u8a0e\u3057\u3001\u30d3\u30b8\u30cd\u30b9\u3092\u30b5\u30a4\u30d0\u30fc\u8105\u5a01\u304b\u3089\u5b88\u308b\u305f\u3081\u306e\u4e00\u6b69\u3092\u8e0f\u307f\u51fa\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<div 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