{"id":7006,"date":"2016-11-18T11:55:58","date_gmt":"2016-11-18T02:55:58","guid":{"rendered":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=7006"},"modified":"2026-02-03T17:25:26","modified_gmt":"2026-02-03T08:25:26","slug":"%e3%83%a1%e3%83%bc%e3%83%ab%e8%aa%8d%e8%a8%bc%e6%a6%82%e8%ab%96","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=7006","title":{"rendered":"\u30e1\u30fc\u30eb\u8a8d\u8a3c\u6982\u8ad6"},"content":{"rendered":"<blockquote><p>\u3053\u306e\u8a18\u4e8b\u306f <a href=\"https:\/\/sendgrid.com\/blog\/email-authentication-explained\/\" target=\"_blank\">Email Authentication Explained<\/a> \u306e\u6284\u8a33\u3067\u3059\u3002<\/p><\/blockquote>\n<p>\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u52c9\u5f37\u306a\u3093\u3066\u3001\u3084\u308b\u6c17\u304c\u8d77\u304d\u307e\u305b\u3093\u3002\u3054\u3061\u3083\u3054\u3061\u3083\u3057\u305f\u7565\u79f0\u304c\u4e26\u3093\u3067\u3044\u3066\u3001IT\u306e\u5c02\u9580\u5bb6\u306b\u3057\u304b\u5206\u304b\u3089\u306a\u3044\u6587\u732e\u304c\u3088\u304f\u51fa\u3066\u304d\u307e\u3059\u304b\u3089\u3002\u3067\u3082\u3001\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u809d\u306e\u3068\u3053\u308d\u306f\u3001\u305f\u3044\u3057\u3066\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u307f\u3093\u306a\u3059\u3050\u306b\u5206\u304b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u30b9\u30d1\u30e0\u696d\u8005\u3084\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u5e2b\u306f\u4f9d\u7136\u3068\u3057\u3066\u6709\u5bb3\u306a\u30e1\u30fc\u30eb\u3092\u6492\u304d\u6563\u3089\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u91cd\u8981\u6027\u306f\u5897\u3059\u3070\u304b\u308a\u3067\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5b9b\u5148\u306b\u5c4a\u3051\u308b\u524d\u306b\u3042\u306e\u624b\u3053\u306e\u624b\u3067\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002\u3061\u3083\u3093\u3068\u8a8d\u8a3c\u3055\u308c\u3066\u3044\u306a\u3044\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u304a\u305d\u3089\u304f\u9001\u4fe1\u306b\u554f\u984c\u304c\u751f\u3058\u3066\u3001\u5c4a\u304b\u306a\u304b\u3063\u305f\u308a\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5206\u985e\u3055\u308c\u305f\u308a\u3057\u3066\u3057\u307e\u3046\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u4ee5\u4e0b\u3067\u306f\u3001\u4e00\u756a\u5927\u5207\u306a\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\uff13\u3064\u3001\u4f8b\u3092\u4ea4\u3048\u306a\u304c\u3089\u5e73\u6613\u306a\u8a00\u8449\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><strong>SPF &#8211; Sender Policy Framework<\/strong><\/h3>\n<p>\u307e\u305a\u3001\u4e00\u756a\u53e4\u3044\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\u306e <a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3509\" target=\"_blank\">Sender Policy Framework (SPF)<\/a> \u304b\u3089\u59cb\u3081\u307e\u3057\u3087\u3046\u3002SPF\u306f\u3001\u9001\u4fe1\u8005\u304c\u81ea\u5206\u306e\u6b63\u5f53\u6027\u3092\u793a\u305b\u308b\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u516c\u5f0f\u306e\u30ec\u30bf\u30fc\u30d8\u30c3\u30c9\u306b\u30d7\u30ea\u30f3\u30c8\u3055\u308c\u305f\u624b\u7d19\u306a\u3089\u3001\u307e\u305a\u9593\u9055\u3044\u306a\u304f\u305d\u306e\u624b\u7d19\u306f\u672c\u7269\u3060\u3068\u5206\u304b\u308b\u3067\u3057\u3087\u3046\u3002SPF\u8a8d\u8a3c\u3092\u901a\u904e\u3057\u305f\u30e1\u30fc\u30eb\u306f\u3001\u3044\u308f\u3070\u914d\u9054\u8a3c\u660e\u90f5\u4fbf\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u8ffd\u8de1\u7528\u306e\u756a\u53f7\u304c\u4e0e\u3048\u3089\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u90f5\u4fbf\u5c40\u306b\u96fb\u8a71\u3092\u3059\u308c\u3070\u8ab0\u304c\u9001\u3063\u305f\u3082\u306e\u304b\u304c\u5206\u304b\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>SPF\u306f\u3001\u5dee\u51fa\u4eba\u306e\u4f4f\u6240\u3092\u78ba\u304b\u3081\u308b\u306e\u306b\u3082\u4f3c\u3066\u3044\u307e\u3059\u3002\u624b\u7d19\u306b\u66f8\u304b\u308c\u305f\u4f1a\u793e\u540d\u3068\u5dee\u51fa\u4eba\u306e\u4f4f\u6240\u304c\u6574\u5408\u3057\u3066\u3044\u306a\u3044\u306a\u3089\u3001\u5f53\u7136\u602a\u3057\u3044\u3067\u3059\u3088\u306d\u3002\u3053\u3046\u3044\u3063\u305f\u30c1\u30a7\u30c3\u30af\u306f\u3001\u624b\u7d19\u3084\u90f5\u4fbf\u306e\u5834\u5408\u306f\u4e0d\u8981\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u306a\u308a\u3059\u307e\u3057\u304c\u975e\u5e38\u306b\u7c21\u5358\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u5834\u5408\u306f\u5fc5\u9808\u3067\u3059\u3002<\/p>\n<p>SPF\u8a8d\u8a3c\u3067\u306f\u3001\u30e1\u30fc\u30eb\u306b\u66f8\u304b\u308c\u305f\u9001\u4fe1\u5143\u30c9\u30e1\u30a4\u30f3\u306eDNS\u306b\u53d7\u4fe1\u30b5\u30fc\u30d0\u304c\u554f\u3044\u5408\u308f\u305b\u3066\u3001\u9001\u4fe1\u5143\u30c9\u30e1\u30a4\u30f3\u306e\u5229\u7528\u304c\u8a31\u53ef\u3055\u308c\u3066\u3044\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u30ea\u30b9\u30c8\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u3082\u3057\u3082\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u304c\u30ea\u30b9\u30c8\u306b\u898b\u3064\u304b\u3089\u306a\u3044\u3068\u304d\u306f\u307b\u307c\u9593\u9055\u3044\u306a\u304f\u507d\u7269\u306a\u306e\u3067\u3001SPF\u8a8d\u8a3c\u304cNG\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3><strong>DKIM \u2013 DomainKeys Identified Mail<\/strong><\/h3>\n<p><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3025\" target=\"_blank\">DomainKeys Identified Mail (DKIM)<\/a> \u306f\u3001\u6bd4\u8f03\u7684\u65b0\u3057\u3044\u3001\u5f37\u529b\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u8a8d\u8a3c\u306e\u65b9\u6cd5\u3067\u3059\u3002DKIM\u306f\u5c01\u7b52\u306e\u5c01\u874b\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u90f5\u4fbf\u30a4\u30f3\u30d5\u30e9\u304c\u3067\u304d\u3042\u304c\u308b\u524d\u306f\u3001\u9001\u308a\u624b\u3060\u3051\u304c\u6301\u3064\u5370\u7ae0\u6307\u8f2a\u3067\u5c01\u874b\u306b\u578b\u62bc\u3057\u3057\u3066\u3001\u624b\u7d19\u304c\u672c\u7269\u3067\u3042\u308b\u3053\u3068\u3092\u7acb\u8a3c\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u786c\u304f\u306a\u3063\u305f\u874b\u304c\u7f8a\u76ae\u7d19\u306b\u304f\u3063\u3064\u3044\u305f\u306e\u3067\u3001\u30d0\u30ec\u306a\u3044\u3088\u3046\u306b\u624b\u7d19\u3092\u6539\u3056\u3093\u3059\u308b\u306e\u306f\u307e\u305a\u7121\u7406\u3067\u3057\u305f\u3002<\/p>\n<p>\u5370\u7ae0\u6307\u8f2a\u306f\u9001\u4fe1\u8005\u56fa\u6709\u306e\u3082\u306e\u306a\u306e\u3067\u3001\u5c01\u874b\u306b\u578b\u62bc\u3057\u3055\u308c\u305f\u5370\u7ae0\u306f\u7f72\u540d\u306e\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u624b\u7d19\u3092\u53d7\u3051\u53d6\u3063\u305f\u4eba\u306f\u3001\u5c01\u7b52\u3092\u8abf\u3079\u308c\u3070\u9001\u308a\u624b\u304c\u672c\u7269\u304b\u3069\u3046\u304b\u3001\u307e\u305f\u540c\u6642\u306b\u624b\u7d19\u306e\u4e2d\u8eab\u304c\u6539\u5909\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u304b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u305f\u306e\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/envelope-with-sealing-wax.jpg\" alt=\"Envelope with sealing wax.\" width=\"100%\" class=\"aligncenter size-full wp-image-7037\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/envelope-with-sealing-wax.jpg 960w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/envelope-with-sealing-wax-225x150.jpg 225w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/envelope-with-sealing-wax-300x200.jpg 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/envelope-with-sealing-wax-768x512.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/p>\n<p>\u624b\u7d19\u306e\u9001\u308a\u624b\u304c\u672c\u7269\u3067\u914d\u9054\u4e2d\u306b\u5185\u5bb9\u304c\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u304b\u3081\u308b\u4ed6\u306e\u65b9\u6cd5\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u9375\u4ed8\u304d\u306e\u5f15\u304d\u51fa\u3057\u3068\u9375\u4ed8\u304d\u306e\u84cb\u304c\u5099\u308f\u3063\u305f\u7bb1\u3092\u30a4\u30e1\u30fc\u30b8\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u5f15\u304d\u51fa\u3057\u306f\u9001\u4fe1\u8005\u306e\u9375\u3067\u306e\u307f\u65bd\u9320\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u9375\u3092\u9001\u4fe1\u8005\u306e\u79d8\u5bc6\u9375\u3068\u547c\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u4e00\u65b9\u3001\u84cb\u306f\u81ea\u7531\u306b\u5229\u7528\u53ef\u80fd\u306a\u9375\u3067\u65bd\u9320\u30fb\u89e3\u9320\u3067\u304d\u308b\u3068\u3057\u307e\u3059\u3002\u30ea\u30af\u30a8\u30b9\u30c8\u3059\u308c\u3070\u3001\u3060\u308c\u3067\u3082\u5408\u9375\u3092\u624b\u306b\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u3069\u3053\u308d\u304b\u3001\u9001\u4fe1\u8005\u306f\u7d4c\u7531\u3059\u308b\u3059\u3079\u3066\u306e\u90f5\u4fbf\u5c40\u306b\u5408\u9375\u3092\u914d\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u9375\u306e\u3053\u3068\u3092\u516c\u958b\u9375\u3068\u547c\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u84cb\u306e\u4e0b\u306f\u30ac\u30e9\u30b9\u677f\u3067\u4ed5\u5207\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u84cb\u306e\u9375\u3092\u958b\u3051\u308c\u3070\u3001\u3060\u308c\u3067\u3082\u30ac\u30e9\u30b9\u8d8a\u3057\u306b\u90f5\u4fbf\u7269\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3067\u3082\u30ac\u30e9\u30b9\u3092\u5272\u3089\u305a\u306b\u3001\u305d\u3057\u3066\u75d5\u8de1\u3092\u6b8b\u3055\u305a\u306b\u4e2d\u8eab\u3092\u6539\u3056\u3093\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u90f5\u4fbf\u7269\u3092\u8abf\u67fb\u3059\u308b\u3068\u304d\u306f\u3001\u516c\u5f0f\u306e\u30ec\u30bf\u30fc\u30d8\u30c3\u30c9\u304c\u76ee\u8996\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3057\u3001\u30ac\u30e9\u30b9\u304c\u5272\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3001\u3064\u307e\u308a\u5f15\u304d\u51fa\u3057\u306f\u9001\u4fe1\u8005\u3060\u3051\u304c\u6301\u3064\u9375\u306b\u3088\u3063\u3066\u65bd\u9320\u3055\u308c\u305f\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>DKIM\u306f\u4e0a\u8a18\u306e\u7bb1\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u9001\u4fe1\u8005\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30d8\u30c3\u30c0\u90e8\u5206\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u79d8\u5bc6\u306e\u6697\u53f7\u9375\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u516c\u958b\u9375\u306f\u5206\u6563\u578b\u306e\u516c\u958b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30ec\u30b8\u30b9\u30c8\u30ea\u3067\u3042\u308bDNS\u3067\u5229\u7528\u53ef\u80fd\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u53d7\u4fe1\u8005\u306b\u5c4a\u304f\u307e\u3067\u306b\u7d4c\u7531\u3059\u308b\u30b5\u30fc\u30d0\u306f\u3059\u3079\u3066\u516c\u958b\u9375\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u3001\u30d8\u30c3\u30c0\u30fc\u3092\u89e3\u8aad\u3057\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6b63\u5f53\u6027\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u304b\u3089\u9375\u4ed8\u304d\u306e\u7bb1\u306e\u5834\u5408\u3068\u540c\u69d8\u306b\u516c\u958b\u9375\u3067\u30d8\u30c3\u30c0\u3092\u6697\u53f7\u5316\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093 (\u5f15\u304d\u51fa\u3057\u306b\u9375\u3092\u639b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093)\u3002\u6697\u53f7\u5316\u306b\u306f\u79d8\u5bc6\u9375\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\u4ed6\u306e\u90f5\u4fbf\u7269\u306b\u306a\u305e\u3089\u3048\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002SPF\u8a8d\u8a3c\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3092\u914d\u9054\u8a3c\u660e\u90f5\u4fbf\u3068\u3059\u308b\u306a\u3089\u3001DKIM\u8a8d\u8a3c\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306f\u66f8\u7559\u90f5\u4fbf\u3067\u3001\u914d\u9054\u306e\u9014\u4e2d\u305a\u3063\u3068\u53b3\u91cd\u306b\u4fdd\u7ba1\u3055\u308c\u3066\u3044\u3066\u6539\u3056\u3093\u3092\u9632\u3044\u3067\u304f\u308c\u307e\u3059\u3002<\/p>\n<h3><strong>DMARC \u2013 Domain Message Authentication Reporting and Conformance<\/strong><\/h3>\n<p>\u3060\u308c\u304b\u304c\u4e8c\u91cd\u30ed\u30c3\u30af\u4ed8\u304d\u306e\u4f8b\u306e\u7bb1\u3092\u3042\u306a\u305f\u306b\u9001\u308b\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u914d\u9054\u696d\u8005\u306f\u8377\u7269\u3092\u5c4a\u3051\u308b\u524d\u306b\u6700\u5f8c\u306e\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u307e\u3059\u3002\u696d\u8005\u306f\u300c\u914d\u9054\u9069\u5408\u30dd\u30ea\u30b7\u30fc\u300d\u3092\u53c2\u7167\u3057\u307e\u3059\u3002\u305d\u306e\u30dd\u30ea\u30b7\u30fc\u306b\u306f\u3001\u8377\u7269\u306f\u4fe1\u983c\u3067\u304d\u308b\u4f4f\u6240\u304b\u3089\u9001\u3089\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3001\u3068\u66f8\u304b\u308c\u3066\u3044\u307e\u3059 (SPF)\u3002<\/p>\n<p>\u307e\u305f\u3001\u79d8\u5bc6\u9375\u3092\u6301\u3063\u3066\u3044\u3066\u4fe1\u7528\u306e\u3067\u304d\u308b\u767a\u9001\u5143\u304b\u3089\u3001\u8377\u7269\u304c\u305a\u3063\u3068\u65bd\u9320\u3055\u308c\u305f\u7bb1\u306e\u4e2d\u306b\u3042\u308a\u3001\u79fb\u52d5\u4e2d\u306b\u4e2d\u8eab\u304c\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u691c\u8a3c\u3067\u304d\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3001\u3068\u3082\u66f8\u304b\u308c\u3066\u3044\u307e\u3059 (DKIM)\u3002\u3055\u3089\u306b\u30dd\u30ea\u30b7\u30fc\u306b\u306f\u3001SPF\u3068DKIM\u3092\u30d1\u30b9\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u306f\u3001\u914d\u9054\u696d\u8005\u304c\u8377\u7269\u3092\u9694\u96e2\u3057\u3066\u3001\u9001\u4fe1\u8005\u306b\u5bfe\u3057\u3066\u4fb5\u5bb3\u304c\u3042\u3063\u305f\u3053\u3068\u3092\u77e5\u3089\u305b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3001\u3068\u3082\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30dd\u30ea\u30b7\u30fc\u306f <a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3137\" target=\"_blank\">Domain Message Authentication Reporting and Conformance (DMARC)<\/a> \u306e\u30dd\u30ea\u30b7\u30fc\u306b\u985e\u4f3c\u3057\u3066\u3044\u307e\u3059\u3002DMARC\u306fSPF\u3068DKIM\u3092\u5143\u306b\u3057\u305f\u6700\u65b0\u306e\u8a8d\u8a3c\u624b\u6bb5\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u3069\u306e\u8a8d\u8a3c\u65b9\u6cd5\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b\u304b\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u5834\u5408\u306f\u3069\u3046\u3059\u308b\u304b\u3001\u3068\u3044\u3063\u305f\u6307\u793a\u3092\u9001\u4fe1\u8005\u304b\u3089\u53d7\u4fe1\u8005\u306b\u77e5\u3089\u305b\u308b\u624b\u6bb5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u6307\u793a\u306b\u306f\u3001\u7591\u308f\u3057\u3044\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u3057\u3066\u9694\u96e2\u3057\u306a\u3055\u3044\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5b8c\u5168\u306b\u62d2\u5426\u3057\u306a\u3055\u3044\u3001\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3068\u3053\u308d\u3067\u3001\u306a\u305c\u9001\u4fe1\u8005\u306b\u3088\u3063\u3066\u306fDMARC\u306e\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3082\u914d\u4fe1\u3057\u305f\u3044\u3068\u601d\u3046\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u5b9f\u306fDMARC\u306f\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u30eb\u30fc\u30d7\u306e\u6a5f\u80fd\u3082\u63d0\u4f9b\u3057\u3066\u3044\u3066\u3001\u9001\u4fe1\u8005\u306f\u81ea\u5206\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u3068\u601d\u308f\u308c\u308b\u30e1\u30fc\u30eb\u304cDMARC\u306e\u30dd\u30ea\u30b7\u30fc\u306b\u9069\u5408\u3057\u3066\u3044\u308b\u304b\u3092\u76e3\u8996\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002Microsoft\u3084Gmail\u306e\u3088\u3046\u306a\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306b\u3057\u3066\u307f\u308c\u3070\u3001\u9577\u671f\u306b\u308f\u305f\u3063\u3066\u591a\u304f\u306e\u5916\u90e8\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u9001\u4fe1\u5143\u304c hotmail.com \u3084 gmail.com \u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u9001\u308a\u7d9a\u3051\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u6025\u306b\u53b3\u683c\u306aDMARC\u30dd\u30ea\u30b7\u30fc\u306b\u5909\u66f4\u3059\u308b\u3068\u591a\u304f\u306e\u9001\u4fe1\u8005\u306b\u60aa\u5f71\u97ff\u3092\u304a\u3088\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u306e\u3067\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306fDMARC\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3082\u5c4a\u304f\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=5384\" target=\"_blank\">\u305d\u308c\u3082\u9593\u3082\u306a\u304f\u5909\u308f\u308a\u307e\u3059<\/a>\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/lockbox.jpg\" alt=\"Lockbox\" width=\"100%\" class=\"aligncenter size-full wp-image-7036\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/lockbox.jpg 960w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/lockbox-225x150.jpg 225w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/lockbox-300x200.jpg 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2016\/11\/lockbox-768x512.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/p>\n<h3><strong>\u307e\u3068\u3081<\/strong><\/h3>\n<p>\u4e0a\u3067\u306f\u3001\u5e83\u304f\u666e\u53ca\u3057\u3066\u3044\u308b3\u3064\u306e\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>SPF\u306f\u3001\u9001\u4fe1\u8005\u306e\u8eab\u5143\u3092\u8a8d\u8a3c\u3059\u308b\u305f\u3081\u306b\u3001\u5dee\u51fa\u4eba\u306e\u4f4f\u6240\u3092\u691c\u8a3c\u3059\u308b\u306e\u3068\u540c\u69d8\u306e\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n<li>DKIM\u306f\u3001\u9001\u4fe1\u8005\u306e\u8eab\u5143\u3092\u8a8d\u8a3c\u3059\u308b\u3060\u3051\u3067\u306f\u306a\u304f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u4e2d\u8eab\u304c\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u9375\u306e\u639b\u304b\u3063\u305f\u7bb1\u3084\u874b\u5c01\u3092\u7528\u3044\u3066\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n<li>DMARC\u306f\u3001\u914d\u9054\u696d\u8005\u3067\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5c4a\u3051\u308b\u524d\u306bSPF\u3084DKIM\u306e\u8981\u6c42\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3><strong>\u30e1\u30fc\u30eb\u8a8d\u8a3c\u304c\u610f\u5473\u3059\u308b\u3082\u306e<\/strong><\/h3>\n<p>DMARC\u304c\u3042\u308c\u3070\u3001\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u306f\u53d7\u4fe1\u8005\u306e\u201dFrom\u201d\u306b\u73fe\u308c\u308b\u30a2\u30c9\u30ec\u30b9\u3092\u5b8c\u5168\u306b\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u5927\u898f\u6a21\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u306e <a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=1797\" target=\"_blank\">Yahoo!<\/a> \u3084 AOL \u306f\u65e2\u306b\u53b3\u683c\u306aDMARC\u30dd\u30ea\u30b7\u30fc\u3092\u5b9f\u65bd\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d0\u30a4\u30c0\u304c\u6240\u6709\u3059\u308b\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u3089\u308c\u305f\u3068\u601d\u308f\u308c\u308b\u30e1\u30fc\u30eb\u306e\u3046\u3061\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u305f\u3082\u306e\u306f\u7834\u68c4\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002Gmail \u3068 Microsoft \u3082\u9593\u3082\u306a\u304f\u540c\u3058\u3088\u3046\u306aDMARC\u30dd\u30ea\u30b7\u30fc\u3092\u5b9f\u65bd\u3059\u308b\u8a08\u753b\u3067\u3059\u3002<\/p>\n<p>\u3067\u3059\u304b\u3089\u3001DKIM\u3068SPF\u306e\u8a2d\u5b9a\u3092\u3057\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306f\u3001\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u3082\u3057\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u4ee3\u308f\u308a\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u305d\u308c\u3092\u53ef\u80fd\u306b\u3059\u308b\u6b63\u3057\u3044DNS\u30ec\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u304b\u3081\u3066\u304f\u3060\u3055\u3044\u3002\u53d7\u4fe1\u8005\u306b\u3057\u3066\u307f\u308c\u3070\u3001\u3053\u3046\u3044\u3063\u305f\u8a8d\u8a3c\u6280\u8853\u304c\u5e83\u304f\u53d7\u3051\u5165\u308c\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u3084\u8ff7\u60d1\u30e1\u30fc\u30eb\u304c\u6e1b\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u3053\u308c\u306f\u826f\u3044\u3053\u3068\u3067\u3059\u3088\u306d\u3002<\/p>\n<h3><strong>\u95a2\u9023\u8a18\u4e8b<\/strong><\/h3>\n<ul>\n<li><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3509\" target=\"_blank\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u3092\u8a8d\u8a3c\u3059\u308b\u305f\u3081\u306eSPF\u30ec\u30b3\u30fc\u30c9\u306b\u8a73\u3057\u304f\u306a\u308d\u3046<\/a><\/li>\n<li><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3025\" target=\"_blank\">\u3088\u304f\u3042\u308b\u8cea\u554f \u2013 DKIM\u7de8<\/a><\/li>\n<li><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3137\" target=\"_blank\">DMARC\u3068\u306f\uff1f\u30ec\u30b3\u30fc\u30c9\u306e\u8aad\u307f\u65b9\u3084\u5bfe\u5fdc\u65b9\u6cd5\u3092\u89e3\u8aac<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306f Email Authentication Explained \u306e\u6284\u8a33\u3067\u3059\u3002 \u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u52c9\u5f37\u306a\u3093\u3066\u3001\u3084\u308b\u6c17\u304c\u8d77\u304d\u307e\u305b\u3093\u3002\u3054\u3061\u3083\u3054\u3061\u3083\u3057\u305f\u7565\u79f0\u304c\u4e26\u3093\u3067\u3044\u3066\u3001IT\u306e\u5c02\u9580\u5bb6\u306b\u3057\u304b\u5206\u304b\u3089\u306a\u3044\u6587\u732e\u304c\u3088\u304f\u51fa\u3066\u304d\u307e\u3059\u304b\u3089\u3002 <a class=\"read-more\" href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=7006\">&#8230;\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":2,"featured_media":7037,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-7006","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-best-practices"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7006"}],"version-history":[{"count":30,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7006\/revisions"}],"predecessor-version":[{"id":19960,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7006\/revisions\/19960"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/media\/7037"}],"wp:attachment":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}