{"id":2459,"date":"2024-01-15T13:37:47","date_gmt":"2024-01-15T04:37:47","guid":{"rendered":"https:\/\/rs.sakura.ad.jp\/column\/?p=2459"},"modified":"2025-08-05T10:56:11","modified_gmt":"2025-08-05T01:56:11","slug":"spf-dkim-dmarc","status":"publish","type":"post","link":"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/","title":{"rendered":"DKIM\u3068\u306f\uff1fSPF\u30fbDMARC\u3068\u5408\u308f\u305b\u3066\u89e3\u8aac\uff01\u8ff7\u60d1\u30e1\u30fc\u30eb\u6271\u3044\u3055\u308c\u306a\u3044\u6e96\u5099"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#%e8%bf%b7%e6%83%91%e3%83%a1%e3%83%bc%e3%83%ab%e6%8c%af%e3%82%8a%e5%88%86%e3%81%91%e3%81%ae%e4%bb%95%e7%b5%84%e3%81%bf\" >\u8ff7\u60d1\u30e1\u30fc\u30eb\u632f\u308a\u5206\u3051\u306e\u4ed5\u7d44\u307f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#%e3%81%aa%e3%81%9c%e3%83%89%e3%83%a1%e3%82%a4%e3%83%b3%e3%81%af%e5%81%bd%e8%a3%85%e3%81%95%e3%82%8c%e3%82%8b%e3%81%ae%e3%81%8b\" >\u306a\u305c\u30c9\u30e1\u30a4\u30f3\u306f\u507d\u88c5\u3055\u308c\u308b\u306e\u304b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#%e3%83%a1%e3%83%bc%e3%83%ab%e3%81%ae%e9%80%81%e4%bf%a1%e5%85%83%e5%81%bd%e8%a3%85%e3%82%92%e9%98%b2%e3%81%903%e3%81%a4%e3%81%ae%e6%8a%80%e8%a1%93\" >\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5143\u507d\u88c5\u3092\u9632\u30503\u3064\u306e\u6280\u8853<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#spf%ef%bc%88sender_policy_framework%ef%bc%89\" >SPF\uff08Sender Policy Framework\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#dkim%ef%bc%88domainkeys_identified_mail%ef%bc%89\" >DKIM\uff08DomainKeys Identified Mail\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#dmarc%ef%bc%88domain-based_message_authentication_reporting_and_conformance%ef%bc%89\" >DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#arc%ef%bc%88authenticated_received_chain%ef%bc%89%e7%bd%b2%e5%90%8d%e3%82%82%e9%87%8d%e8%a6%81\" >ARC\uff08Authenticated Received Chain\uff09\u7f72\u540d\u3082\u91cd\u8981<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#%e3%81%82%e3%81%8f%e3%81%be%e3%81%a7%e9%80%81%e4%bf%a1%e8%80%85%e3%82%92%e6%a4%9c%e8%a8%bc%e3%81%99%e3%82%8b%e3%81%93%e3%81%a8%e3%81%ab%e6%b3%a8%e6%84%8f%e3%81%99%e3%82%8b\" >\u3042\u304f\u307e\u3067\u9001\u4fe1\u8005\u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u306b\u6ce8\u610f\u3059\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#smime%e8%a8%bc%e6%98%8e%e6%9b%b8%e3%81%ab%e3%82%88%e3%82%8b%e9%9b%bb%e5%ad%90%e7%bd%b2%e5%90%8d%e3%81%a8%e3%81%ae%e9%81%95%e3%81%84\" >S\/MIME\u8a3c\u660e\u66f8\u306b\u3088\u308b\u96fb\u5b50\u7f72\u540d\u3068\u306e\u9055\u3044<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/#%e3%81%be%e3%81%a8%e3%82%81%e3%80%81%e9%9b%bb%e5%ad%90%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%92%e6%94%af%e3%81%88%e3%82%8b%e6%8a%80%e8%a1%93\" >\u307e\u3068\u3081\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u652f\u3048\u308b\u6280\u8853<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e8%bf%b7%e6%83%91%e3%83%a1%e3%83%bc%e3%83%ab%e6%8c%af%e3%82%8a%e5%88%86%e3%81%91%e3%81%ae%e4%bb%95%e7%b5%84%e3%81%bf\"><\/span>\u8ff7\u60d1\u30e1\u30fc\u30eb\u632f\u308a\u5206\u3051\u306e\u4ed5\u7d44\u307f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u306f\u300c\u52dd\u624b\u306b\u5165\u308b\u5834\u5408\u300d\u3068\u300c\u81ea\u5206\u3067\u5165\u308c\u308b\u5834\u5408\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u5ea6\u81ea\u5206\u3067\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u632f\u308a\u5206\u3051\u308b\u3068\u6b21\u304b\u3089\u540c\u3058\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306f\u81ea\u52d5\u7684\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u308b\u3068\u3044\u3046\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u4e00\u4f53\u3069\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u3067\u52d5\u4f5c\u3057\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306f\u69d8\u3005\u306a\u7a2e\u985e\u304c\u3042\u308b\u305f\u3081\u3001\u4eca\u56de\u306f\u4e00\u822c\u7684\u306a\u3082\u306e\u3092\u4f8b\u306b\u6319\u3052\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306f\u30a6\u30a3\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u306e\u3088\u3046\u306a\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u300d\u306e\u4e00\u7a2e\u3067\u3059\u304c\u3001\u4e00\u822c\u306e\u4eba\u304cPC\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u4f7f\u3046\u3088\u308a\u306f\u3001\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u3084Gmail\u306a\u3069\u306e\u30b5\u30fc\u30d3\u30b9\u5074\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30fb\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30d5\u30a3\u30eb\u30bf\u306b\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u60c5\u5831\u3092\u8aad\u307f\u53d6\u3089\u305b\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u30e1\u30fc\u30eb\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u304b\u5426\u304b\u3092\u5224\u5b9a\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u5224\u5b9a\u306b\u306f\u300c\u30b9\u30b3\u30a2\u5236\u300d\u304c\u7528\u3044\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u300c\u3053\u306e\u9001\u4fe1\u5143\u306a\u3089\u30b9\u30b3\u30a2\u30d7\u30e9\u30b91\u300d\u300c\u3053\u306e\u5358\u8a9e\u304c\u3042\u308b\u3068\u30b9\u30b3\u30a2\u30d7\u30e9\u30b92\u300d\u300c\u904e\u53bb\u306b\u540c\u3058\u5b9b\u5148\u3084\u5185\u5bb9\u306e\u30e1\u30fc\u30eb\u3092\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u3057\u305f\u306e\u3067\u30d7\u30e9\u30b95\u300d\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u30b9\u30b3\u30a2\u304c\u5897\u3048\u3066\u3044\u304d\u3001\u300c\u30b9\u30b3\u30a250\u4ee5\u4e0a\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u5224\u5b9a\u3059\u308b\u300d\u8a2d\u5b9a\u306e\u5834\u5408\u3001\u30b9\u30b3\u30a2\u304c50\u3092\u8d85\u3048\u308b\u3068\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u632f\u308a\u5206\u3051\u3089\u308c\u308b\u308f\u3051\u3067\u3059\u3002\u3053\u306e\u57fa\u6e96\u3068\u306a\u308b\u30b9\u30b3\u30a2\uff08\u95be\u5024\uff09\u306f\u5909\u66f4\u3067\u304d\u308b\u5834\u5408\u304c\u591a\u304f\u3001\u3055\u304f\u3089\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u3067\u3082\u5f31\u301c\u4e2d\u301c\u5f37\u306e3\u6bb5\u968e\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/help.sakura.ad.jp\/mail\/2109\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306e\u5f37\u5ea6\u3092\u8a2d\u5b9a\u3057\u305f\u3044 | \u3055\u304f\u3089\u306e\u30b5\u30dd\u30fc\u30c8\u60c5\u5831<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u5143\u30c9\u30e1\u30a4\u30f3\u3084IP\u30a2\u30c9\u30ec\u30b9\u3001\u672c\u6587\u306e\u5185\u5bb9\u306a\u3069\u69d8\u3005\u306a\u5224\u5b9a\u8981\u7d20\u304c\u3042\u308a\u3001Cloudmark\u3001Hornetsecurity(\u65e7Vade)\u3068\u3044\u3063\u305f\u5546\u7528\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306f\u4e16\u754c\u4e2d\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u69cb\u7bc9\u3057\u3001\u3053\u308c\u3092\u5224\u5b9a\u3059\u308b\u6b63\u78ba\u6027\u3092\u7af6\u3063\u3066\u3044\u307e\u3059\u3002\u6700\u8fd1\u3067\u306fAI\uff08\u6a5f\u68b0\u5b66\u7fd2\uff09\u3092\u7528\u3044\u3066\u5224\u5b9a\u3057\u3066\u304f\u308c\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u30b9\u30b3\u30a2\u3092\u5897\u3084\u3059\u8981\u7d20\u306b\u3064\u3044\u3066\u306f\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u3054\u3068\u306b\u69d8\u3005\u306a\u3082\u306e\u304c\u7528\u3044\u3089\u308c\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u306e\u4e00\u3064\u306b\u3001\u300c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u507d\u88c5\u300d\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e3%81%aa%e3%81%9c%e3%83%89%e3%83%a1%e3%82%a4%e3%83%b3%e3%81%af%e5%81%bd%e8%a3%85%e3%81%95%e3%82%8c%e3%82%8b%e3%81%ae%e3%81%8b\"><\/span>\u306a\u305c\u30c9\u30e1\u30a4\u30f3\u306f\u507d\u88c5\u3055\u308c\u308b\u306e\u304b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u306f\u304a\u5ba2\u69d8\u3078\u6570\u591a\u304f\u306e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u304a\u308a\u3001\u305d\u306e\u306a\u304b\u306b\u306f\u300c\u3053\u306e\u9280\u884c\u53e3\u5ea7\u306b\u304a\u91d1\u3092\u632f\u308a\u8fbc\u3093\u3067\u304f\u3060\u3055\u3044\u300d\u3068\u3044\u3046\u5185\u5bb9\u306e\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u3046\u3044\u3063\u305f\u30e1\u30fc\u30eb\u3067\u306e\u9023\u7d61\u306f\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u306b\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3042\u308a\u3001\u5b9f\u969b\u306b\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u306e\u9023\u7d61\u3092\u88c5\u3063\u305f\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u30e1\u30fc\u30eb\u3082\u89b3\u6e2c\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u300csupport@sakura.ad.jp\u300d\u3068\u3044\u3046\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u304a\u554f\u3044\u5408\u308f\u305b\u9001\u4fe1\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092From\uff08\u9001\u4fe1\u5143\uff09\u306b\u8a2d\u5b9a\u3057\u3066\u52dd\u624b\u306b\u9001\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u5b9f\u969b\u306b\u306fsakura.ad.jp\u304b\u3089\u9001\u3089\u308c\u305f\u308f\u3051\u3067\u306f\u306a\u3044\u306e\u3067\u7b2c\u4e09\u8005\u304c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u3092\u507d\u88c5\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u96fb\u5b50\u30e1\u30fc\u30eb\u3067\u306f\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u306b\u8868\u793a\u3055\u308c\u308bFrom\u306f\u597d\u304d\u306a\u3082\u306e\u306b\u8a2d\u5b9a\u3067\u304d\u308b\u305f\u3081\u3001\u5b9f\u969b\u306b\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u6240\u6709\u3057\u3066\u3044\u306a\u304f\u3066\u3082From\u306b\u8a2d\u5b9a\u3057\u3066\u30e1\u30fc\u30eb\u306f\u9001\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u901a\u5e38\u306e\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u3067\u306fFrom\u306e\u30a2\u30c9\u30ec\u30b9\u3084\u540d\u524d\u3092\u305d\u306e\u307e\u307e\u9001\u4fe1\u8005\u6b04\u306b\u8868\u793a\u3059\u308b\u305f\u3081\u3001\u300c\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 support@sakura.ad.jp\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u3082\u306e\u306e\u3001\u5b9f\u969b\u306b\u306f\u5168\u304f\u306e\u5225\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u3066\u3044\u308b\u3068\u3044\u3063\u305f\u3053\u3068\u3082\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u53d7\u4fe1\u8005\u306f\u300c\u3042\u3001\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u304a\u91d1\u6255\u308f\u306a\u304d\u3083\uff01\u300d\u3068\u8aa4\u89e3\u3057\u3066\u3057\u307e\u3044\u3001\u8a50\u6b3a\u306e\u53e3\u5ea7\u306b\u5165\u91d1\u3092\u3057\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u306b\u3064\u3044\u3066\u306e\u8a73\u7d30\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30e9\u30e0\u3067\u3082\u53d6\u308a\u4e0a\u3052\u3066\u3044\u307e\u3059\u3002\u9001\u4fe1\u5143\u507d\u88c5\u3068\u306f\u5225\u306e\u6b21\u5143\u3067\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u5bfe\u7b56\u3068\u3057\u3066\u306f\u300c\u30e1\u30fc\u30eb\u3067\u9001\u3089\u308c\u3066\u304d\u305f\u30ea\u30f3\u30af\u306f\u30af\u30ea\u30c3\u30af\u3057\u306a\u3044\u300d\u304c\u539f\u5247\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ssl.sakura.ad.jp\/column\/phishing\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u8a50\u6b3a\u30b5\u30a4\u30c8\u3082SSL\u5316\u304c\u5f53\u305f\u308a\u524d\uff1f\uff01\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u88ab\u5bb3\u3092\u56de\u907f\u3059\u308b4\u3064\u306e\u5bfe\u7b56\u3068\u306f\uff1f | \u3055\u304f\u3089\u306eSSL<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e3%83%a1%e3%83%bc%e3%83%ab%e3%81%ae%e9%80%81%e4%bf%a1%e5%85%83%e5%81%bd%e8%a3%85%e3%82%92%e9%98%b2%e3%81%903%e3%81%a4%e3%81%ae%e6%8a%80%e8%a1%93\"><\/span><strong>\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5143\u507d\u88c5\u3092\u9632\u30503\u3064\u306e\u6280\u8853<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5143\u507d\u88c5\u3092\u9632\u3050\u306e\u306b\u306f\u5927\u304d\u304f3\u3064\u306e\u6280\u8853\u304c\u4e00\u822c\u7684\u306b\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"spf%ef%bc%88sender_policy_framework%ef%bc%89\"><\/span><strong>SPF\uff08Sender Policy Framework\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SPF\u306f\u9001\u4fe1\u8005\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092DNS\u7d4c\u7531\u3067\u30c9\u30e1\u30a4\u30f3\u3068\u7d10\u4ed8\u3051\u3066\u78ba\u8a8d\u3057\u307e\u3059\u3002support@sakura.ad.jp \u304b\u3089\u30e1\u30fc\u30eb\u304c\u6765\u305f\u5834\u5408\u306b\u3001\u9001\u4fe1\u3057\u3066\u304d\u305f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u306f\u308f\u304b\u308a\u307e\u3059\u304c\u3001\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u672c\u5f53\u306bsakura.ad.jp\u306a\u306e\u304b\u306f\u308f\u304b\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u3092\u8abf\u3079\u308b\u306e\u304cSPF\u3067\u3059\u3002SPF\u306fDNS\u306b\u8a2d\u5b9a\u3055\u308c\u3001\u300csakura.ad.jp\u3067\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u308b\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u306f\u301c\u3067\u3059\u3088\u300d\u3068sakura.ad.jp\u306eDNS\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3064\u307e\u308a\u3001\u300csakura.ad.jp\u300d\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u6240\u6709\u3057\u3066\u3044\u308b\u4eba\uff08\u3053\u306e\u5834\u5408\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\uff09\u306b\u3057\u304b\u7de8\u96c6\u3067\u304d\u306a\u3044\u5834\u6240\u306b\u30e1\u30fc\u30eb\u9001\u4fe1\u30b5\u30fc\u30d0\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u516c\u958b\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306b\u3088\u308a\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u3084\u30e1\u30fc\u30eb\u53d7\u4fe1\u30bd\u30d5\u30c8\u306f\u53d7\u4fe1\u3057\u305f\u30a2\u30c9\u30ec\u30b9\u306eSPF\u3092DNS\u7d4c\u7531\u3067\u691c\u8a3c\u3057\u3001\u5b9f\u969b\u306b\u9001\u3089\u308c\u3066\u304d\u305fIP\u30a2\u30c9\u30ec\u30b9\u304cSPF\u306b\u8a18\u8f09\u3055\u308c\u305f\u3082\u306e\u3068\u7167\u5408\u3067\u304d\u307e\u3059\u3002\u5408\u81f4\u3059\u308c\u3070\u3001\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306f\u5b9f\u969b\u306b\u3055\u304f\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304c\u9001\u4fe1\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u5927\u304d\u304f\u9ad8\u307e\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30e1\u30fc\u30eb\u306b\u306f2\u3064\u306eFrom\u304c\u3042\u308a\u3001SPF\u3067\u691c\u8a3c\u3057\u3066\u3044\u308b\u306e\u306f\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u3067\u8868\u793a\u3059\u308bFrom\u3067\u306f\u306a\u304f\u3001\u30d8\u30c3\u30c0\u30fc\u306b\u66f8\u304b\u308c\u3066\u3044\u308bFrom\uff08Return-Path\uff09\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u691c\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3061\u308d\u3093\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u507d\u88c5\u306f\u53ef\u80fd\u306a\u306e\u3067\u3001\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u6b63\u898f\u306e\u30c9\u30e1\u30a4\u30f3\u306eSPF\u304b\u3089\u53d6\u5f97\u3057\u3066\u3001\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u66f8\u3044\u3066\u3057\u307e\u3048\u3070\u9001\u4fe1\u5143\u306e\u507d\u88c5\u304c\u53ef\u80fd\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u507d\u88c5\u306fFrom\u30d8\u30c3\u30c0\u507d\u88c5\u3088\u308a\u306f\u96e3\u6613\u5ea6\u304c\u9ad8\u3044\u3067\u3059\u304c\u3001\u53ef\u80fd\u3067\u306f\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u767b\u5834\u3059\u308b\u306e\u304c\u6b21\u306eDKIM\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"dkim%ef%bc%88domainkeys_identified_mail%ef%bc%89\"><\/span><strong>DKIM\uff08DomainKeys Identified Mail\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DKIM\u306f\u9001\u4fe1\u6642\u306b\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306b\u96fb\u5b50\u7f72\u540d\u3092\u65bd\u3057\u307e\u3059\u3002\u53d7\u4fe1\u8005\u306fDNS\u306b\u8a2d\u5b9a\u3055\u308c\u305fDKIM\u306e\u516c\u958b\u9375\u3092\u5229\u7528\u3057\u3066\u305d\u306e\u96fb\u5b50\u7f72\u540d\u3092\u691c\u8a3c\u3067\u304d\u3001\u300c\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u300d\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002DNS\u306b\u8a2d\u5b9a\u3055\u308c\u305f\u516c\u958b\u9375\u306f\u8ab0\u3067\u3082\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u308c\u3068\u30da\u30a2\u306b\u306a\u3063\u305f\u79d8\u5bc6\u9375\u306f\u6b63\u898f\u306e\u9001\u4fe1\u8005\u306e\u30b5\u30fc\u30d0\u306b\u3057\u304b\u5b58\u5728\u3057\u306a\u3044\u305f\u3081\u3001\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u304c\u7ba1\u7406\u3067\u304d\u308b\u30b5\u30fc\u30d0\u304b\u3089\u9001\u4fe1\u3055\u308c\u3001\u304b\u3064\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u96fb\u5b50\u7f72\u540d\u306b\u3088\u3063\u3066\u8a8d\u8a3c\u3055\u308c\u308b\u306e\u3067\u3059\u3002\u9006\u306b\u7b2c\u4e09\u8005\u304cDKIM\u306e\u96fb\u5b50\u7f72\u540d\u3092\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u3001\u672c\u5f53\u306e\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u304cDNS\u306b\u516c\u958b\u3057\u3066\u3044\u308b\u516c\u958b\u9375\u3068\u30da\u30a2\u306b\u306a\u308b\u79d8\u5bc6\u9375\u304c\u7121\u3044\u305f\u3081\u3001\u96fb\u5b50\u7f72\u540d\u306e\u691c\u8a3c\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u9001\u4fe1\u8005\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30c9\u30e1\u30a4\u30f3\u304c\u78ba\u304b\u306b\u305d\u306e\u901a\u308a\u306e\u30b5\u30fc\u30d0\u304b\u3089\u9001\u3089\u308c\u3066\u304d\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002SPF\u306b\u3088\u308a\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306e\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u6539\u3056\u3093\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u306f\u610f\u5473\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u3092DKIM\u306b\u3088\u3063\u3066\u96e3\u3057\u304f\u3059\u308b\u308f\u3051\u3067\u3059\u3002SPF\u3068DKIM\u3092\u30af\u30ea\u30a2\u3059\u308b\u3053\u3068\u3067\u305d\u306e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u3068\u30c9\u30e1\u30a4\u30f3\u304c\u7d10\u4ed8\u3051\u3089\u308c\u3001\u304b\u3064\u305d\u306e\u5185\u5bb9\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u53ef\u80fd\u6027\u304c\u5927\u304d\u304f\u9ad8\u307e\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001SPF\u3067\u691c\u8a3c\u3055\u308c\u308b\u30c9\u30e1\u30a4\u30f3\u306f\u3042\u304f\u307e\u3067\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u3067\u8868\u793a\u3055\u308c\u308b\u9001\u4fe1\u8005\u306e\u6b04\u3067\u306f\u306a\u3044\u305f\u3081\u3001SPF\u3068DKIM\u3067\u306f\u307e\u3060\u4e0d\u5b8c\u5168\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"dmarc%ef%bc%88domain-based_message_authentication_reporting_and_conformance%ef%bc%89\"><\/span><strong>DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DMARC\u3067\u306fDKIM\u3084SPF\u3067\u691c\u8a3c\u3057\u305f\u7d50\u679c\u3001\u30af\u30ea\u30a2\u3057\u306a\u304b\u3063\u305f\u3068\u304d\u306b\u3069\u3046\u3059\u308b\u306e\u304b\u3092\u9001\u4fe1\u8005\u304c\u6307\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u3068\u3082\u306b\u3001SPF\u3068DKIM\u306e\u7d50\u679c\u3092\u7dcf\u5408\u3057\u3066\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u3067\u9001\u4fe1\u8005\u3068\u3057\u3066\u8868\u793a\u3055\u308c\u308bFrom\u30c9\u30e1\u30a4\u30f3\u3092\u8a8d\u8a3c\u3057\u307e\u3059\u3002DNS\u3067\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u30c9\u30e1\u30a4\u30f3\u306bDMARC\u7528\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u3001\u3053\u308c\u3082SPF\u3084DKIM\u3068\u540c\u69d8\u306b\u300c\u30c9\u30e1\u30a4\u30f3\u3092\u6240\u6709\u3057\u3066\u3044\u308b\u4eba\u3057\u304b\u7de8\u96c6\u3067\u304d\u306a\u3044\u300d\u3068\u3044\u3046DNS\u306e\u7279\u6027\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002DMARC\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u5224\u5b9a\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u8005\u5074\u3067\u305d\u306e\u307e\u307e\u53d7\u4fe1\u3059\u308b\u304b\u3001\u62d2\u5426\u3059\u308b\u304b\u3001\u9694\u96e2\u3059\u308b\u304b\u3068\u3044\u3063\u305f\u51e6\u7406\u5185\u5bb9\u3092\u9001\u4fe1\u8005\u304c\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u3055\u3089\u306b\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u5074\u3067\u51e6\u7406\u3057\u305f\u5185\u5bb9\u3092\u9001\u4fe1\u8005\u304c\u53d7\u3051\u53d6\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001SPF,DKIM,DMARC\u306e3\u3064\u304c\u5168\u3066\u4f7f\u3048\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u9001\u4fe1\u30e1\u30fc\u30eb\u306e\u507d\u88c5\u3092\u691c\u77e5\u3057\u3066\u9069\u5207\u306b\u53d7\u4fe1\u62d2\u5426\u3084\u9694\u96e2\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"arc%ef%bc%88authenticated_received_chain%ef%bc%89%e7%bd%b2%e5%90%8d%e3%82%82%e9%87%8d%e8%a6%81\"><\/span><strong>ARC\uff08Authenticated Received Chain\uff09<\/strong>\u7f72\u540d\u3082\u91cd\u8981<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ARC\u306f\u3001\u3053\u306eSPF\u3084DKIM\u306b\u3088\u3063\u3066\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306b\u52a0\u3048\u3089\u308c\u305f\u60c5\u5831\u3092\u3001\u30e1\u30fc\u30eb\u304c\u8ee2\u9001\u3055\u308c\u3066\u3044\u304f\u904e\u7a0b\u3067\u3082\u4fdd\u6301\u3001\u66f4\u65b0\u3067\u304d\u308b\u898f\u683c\u3067\u3059\u3002\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u306f\u6570\u591a\u304f\u306e\u4e2d\u7d99\u30b5\u30fc\u30d3\u30b9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u4e2d\u7d99\u30b5\u30fc\u30d3\u30b9\u3092\u901a\u904e\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u304c\u5909\u66f4\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3059\u308b\u3068\u3001DKIM\u3084SPF\u304c\u691c\u8a3c\u3067\u304d\u306a\u304f\u306a\u308a\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u3057\u3066\u306e\u30b9\u30b3\u30a2\u304c\u4e0a\u304c\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002ARC\u306f\u4e2d\u7d99\/\u8ee2\u9001\u3055\u308c\u305f\u969b\u3082ARC\u30d8\u30c3\u30c0\u306b\u8a18\u9332\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u6700\u7d42\u5230\u7740\u5730\u3067\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u3092\u691c\u8a3c\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u304f\u3089\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u3067\u306f\u30012025\u5e742\u6708\u306b\u3053\u306eARC\u306b\u3082\u5bfe\u5fdc\u3057\u3001Gmail\u306a\u3069\u306b\u8ee2\u9001\u3055\u308c\u308b\u30e1\u30fc\u30eb\u3067\u3082DKIM\u306e\u691c\u8a3c\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u9001\u4fe1\u5148\u3001\u8ee2\u9001\u5148\u3067\u62d2\u5426\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u5927\u304d\u304f\u4f4e\u4e0b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e3%81%82%e3%81%8f%e3%81%be%e3%81%a7%e9%80%81%e4%bf%a1%e8%80%85%e3%82%92%e6%a4%9c%e8%a8%bc%e3%81%99%e3%82%8b%e3%81%93%e3%81%a8%e3%81%ab%e6%b3%a8%e6%84%8f%e3%81%99%e3%82%8b\"><\/span>\u3042\u304f\u307e\u3067\u9001\u4fe1\u8005\u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u306b\u6ce8\u610f\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\u3057\u305f\u3044\u70b9\u3068\u3057\u3066\u3001\u3053\u3053\u307e\u3067\u7d39\u4ecb\u3057\u3066\u304d\u305fSPF,DKIM,DMARC\u306f\u3001\u3042\u304f\u307e\u3067\u300c\u9001\u4fe1\u8005\u306fFrom\u306b\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306e\u30b5\u30fc\u30d0\u304b\u3089\u9001\u3089\u308c\u3066\u3044\u308b\u300d\u3053\u3068\u3092\u62c5\u4fdd\u3057\u3066\u304f\u308c\u308b\u3060\u3051\u306b\u3059\u304e\u307e\u305b\u3093\u3002\u3053\u3053\u307e\u3067\u5bfe\u7b56\u3092\u884c\u3063\u3066\u3082\u3001\u7d50\u5c40From\u306e\u90e8\u5206\u306f\u9069\u5f53\u306a\u6587\u5b57\u5217\u3092\u5165\u308c\u3066\u304a\u304d\u3001Subject\u306b\u305d\u308c\u3089\u3057\u3044\u4ef6\u540d\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u300c\u9001\u4fe1\u5143\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u6b63\u898f\u306e\u3082\u306e\u3067\u306f\u306a\u3044\u3051\u3069\u4ef6\u540d\u306f\u6b63\u898f\u306e\u3082\u306e\u3068\u540c\u3058\u30e1\u30fc\u30eb\u300d\u3092\u9001\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3001\u3053\u306e\u5834\u5408From\u306e\u30c9\u30e1\u30a4\u30f3\u306f\u507d\u88c5\u3059\u308b\u5fc5\u8981\u306f\u306a\u304f\u306a\u308b\u306e\u3067\u3001SPF,DKIM,DMARC\u5168\u3066\u3092PASS\u3001\u3064\u307e\u308a\u901a\u904e\u3059\u308b\u3053\u3068\u306f\u6bd4\u8f03\u7684\u7c21\u5358\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"259\" src=\"https:\/\/rs.sakura.ad.jp\/column\/wp-content\/uploads\/2024\/01\/dkimss-700x259.png\" alt=\"\" class=\"wp-image-2557\" srcset=\"https:\/\/rs.sakura.ad.jp\/column\/wp-content\/uploads\/2024\/01\/dkimss-700x259.png 700w, https:\/\/rs.sakura.ad.jp\/column\/wp-content\/uploads\/2024\/01\/dkimss-250x92.png 250w, https:\/\/rs.sakura.ad.jp\/column\/wp-content\/uploads\/2024\/01\/dkimss-768x284.png 768w, https:\/\/rs.sakura.ad.jp\/column\/wp-content\/uploads\/2024\/01\/dkimss-120x44.png 120w, https:\/\/rs.sakura.ad.jp\/column\/wp-content\/uploads\/2024\/01\/dkimss.png 1015w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u306e\u753b\u50cf\u306e\u3088\u3046\u306b\u3001\u4ef6\u540d\u306f\u305d\u308c\u3089\u3057\u3044\u3082\u306e\u304c\u5165\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u9001\u4fe1\u8005\u306f\u30d5\u30ea\u30fc\u30e1\u30fc\u30eb\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30e1\u30fc\u30eb\u306f\u9001\u4fe1\u8005\u306f\u78ba\u304b\u306b\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u3067DMARC\u307e\u3067\u5bfe\u5fdc\u3057\u3066\u9001\u4fe1\u3057\u3066\u3044\u308b\u306e\u3067\u3001SPF,DKIM,DMARC\u3059\u3079\u3066PASS\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5148\u306f\u3001\u672c\u6587\u306a\u3069\u3082\u542b\u3081\u3066\u5224\u65ad\u3059\u308b\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306e\u51fa\u756a\u306b\u306a\u308a\u307e\u3059\u3057\u3001\u305d\u3053\u3082\u901a\u904e\u3055\u308c\u308b\u3068\u6700\u5f8c\u306f\u81ea\u5206\u306e\u76ee\u3067\u898b\u3066\u5224\u65ad\u3059\u308b\u5fc5\u8981\u304c\u51fa\u3066\u304d\u307e\u3059\u3002\u30e1\u30fc\u30eb\u5185\u306e\u30ea\u30f3\u30af\u306f\u6975\u529b\u30af\u30ea\u30c3\u30af\u3057\u306a\u3044\u7656\u3092\u3064\u3051\u3066\u304a\u304f\u65b9\u304c\u3088\u3044\u3068\u8a00\u308f\u308c\u308b\u306e\u306f\u305d\u3046\u3044\u3063\u305f\u4e8b\u60c5\u3082\u3042\u308b\u304b\u3089\u306a\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"smime%e8%a8%bc%e6%98%8e%e6%9b%b8%e3%81%ab%e3%82%88%e3%82%8b%e9%9b%bb%e5%ad%90%e7%bd%b2%e5%90%8d%e3%81%a8%e3%81%ae%e9%81%95%e3%81%84\"><\/span>S\/MIME\u8a3c\u660e\u66f8\u306b\u3088\u308b\u96fb\u5b50\u7f72\u540d\u3068\u306e\u9055\u3044<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\/MIME\u8a3c\u660e\u66f8\u3068\u3044\u3046\u3082\u306e\u3092\u4f7f\u3063\u3066\u30e1\u30fc\u30eb\u306b\u96fb\u5b50\u7f72\u540d\u3059\u308b\u6280\u8853\u3082\u3042\u308a\u3001\u9280\u884c\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306a\u3069\u4e00\u90e8\u3067\u666e\u53ca\u3057\u3066\u304a\u308a\u3001\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u306b\u3088\u3063\u3066\u306f\u8a8d\u8a3c\u3067\u304d\u305f\u30e1\u30fc\u30eb\u306b\u30e1\u30c0\u30eb\u306e\u3088\u3046\u306a\u30a2\u30a4\u30b3\u30f3\u304c\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002DKIM\u306a\u3069\u3068\u306f\u4f55\u304c\u9055\u3046\u306e\u3067\u3057\u3087\u3046\u304b\uff1fS\/MIME\u306b\u3088\u308b\u30e1\u30fc\u30eb\u306e\u7f72\u540d\u306f\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u306e\u307f\u306eDKIM\u3068\u9055\u3063\u3066\u500b\u3005\u306e\u30e1\u30fc\u30eb\u30a2\u30ab\u30a6\u30f3\u30c8\uff08\u4f8b\u3048\u3070support@sakura.ad.jp\uff09\u306b\u3088\u3063\u3066\u96fb\u5b50\u7f72\u540d\u3055\u308c\u3001\u3055\u3089\u306b\u8a3c\u660e\u66f8\u306f\u7b2c\u4e09\u8005\u306e\u8a8d\u8a3c\u5c40\u306b\u3088\u3063\u3066\u767a\u884c\/\u8a8d\u8a3c\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001DKIM\u3068\u306f\u7570\u306a\u308a\u3001\u300c\u7b2c\u4e09\u8005\uff08\u8a8d\u8a3c\u5c40\uff09\u304csupoprt@sakura.ad.jp\u306b\u5bfe\u3057\u3066\u767a\u884c\u3057\u305f\u8a3c\u660e\u66f8\u306b\u3088\u3063\u3066\u96fb\u5b50\u7f72\u540d\u3055\u308c\u305f\u3053\u3068\u3092\u8a8d\u8a3c\u3057\u3001\u304b\u3064\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u300d\u3053\u3068\u3092\u8a3c\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\/MIME\u306e\u65b9\u304c\u30e1\u30fc\u30eb\u672c\u6587\u3082\u542b\u3081\u3066\u96fb\u5b50\u7f72\u540d\u3059\u308b\u3053\u3068\u304b\u3089\u3001\u672c\u6587\u306e\u6539\u3056\u3093\u9632\u6b62\u3082\u884c\u308f\u308c\u3001\u304b\u3064\u8a8d\u8a3c\u5c40\u3068\u3044\u3046\u7b2c\u4e09\u8005\u6a5f\u95a2\u304c\u767a\u884c\u3057\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308a\u8a8d\u8a3c\u30ec\u30d9\u30eb\u306fDKIM\u3088\u308a\u3082\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u5206\u3001\u8a3c\u660e\u66f8\u306e\u4fa1\u683c\u81ea\u4f53\u3082\u5fc5\u8981\u306b\u306a\u308b\u305f\u3081\u9001\u4fe1\u5074\u306e\u30b3\u30b9\u30c8\u306f\u5358\u7d14\u306bDKIM\u3092\u5229\u7528\u3059\u308b\u3088\u308a\u3082\u304b\u306a\u308a\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e3%81%be%e3%81%a8%e3%82%81%e3%80%81%e9%9b%bb%e5%ad%90%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%92%e6%94%af%e3%81%88%e3%82%8b%e6%8a%80%e8%a1%93\"><\/span><strong>\u307e\u3068\u3081\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u652f\u3048\u308b\u6280\u8853<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u96fb\u5b50\u30e1\u30fc\u30eb\u306f1970\u5e74\u4ee3\u9803\u304b\u3089\u958b\u767a\u3055\u308c\u3066\u304d\u305f\u975e\u5e38\u306b\u53e4\u3044\u6280\u8853\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u6697\u53f7\u5316\u304c\u524d\u63d0\u306b\u306a\u3063\u3066\u304a\u3089\u305a\u6539\u3056\u3093\u304c\u53ef\u80fd\u3060\u3063\u305f\u308a\u3001\u30d8\u30c3\u30c0\u507d\u88c5\u306a\u3069\u304c\u7c21\u5358\u306b\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u3053\u3046\u3057\u305f\u6b20\u70b9\u3092\u88dc\u3046\u305f\u3081\u306b\u7d4c\u8def\u3092HTTPS\u5316\u3059\u308b\u6280\u8853\u3084\u3001SPF\u3001DKIM\u3001DMARC\u3001ARC\u3001S\/MIME\u3068\u3044\u3063\u305f\u898f\u683c\u304c\u6a19\u6e96\u5316\u3055\u308c\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3084\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5b9f\u88c5\u3055\u308c\u3066\u304d\u305f\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001\u5f53\u521d\u306f\u62d2\u5426\u30ea\u30b9\u30c8\u3001\u8a31\u53ef\u30ea\u30b9\u30c8\u7a0b\u5ea6\u3060\u3063\u305f\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306e\u5074\u3082\u3001\u30d9\u30a4\u30b8\u30a2\u30f3\u30d5\u30a3\u30eb\u30bf\u3084\u8fd1\u5e74\u306fAI\/\u6a5f\u68b0\u5b66\u7fd2\u6280\u8853\u306a\u3069\u3067\u5927\u304d\u304f\u9032\u5316\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u4eca\u56de\u7d39\u4ecb\u3057\u305fDKIM\u306a\u3069\u306e\u6280\u8853\u4ee5\u5916\u306e\u90e8\u5206\u3067\u3082\u8ff7\u60d1\u30e1\u30fc\u30eb\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3059\u308b\u30ed\u30b8\u30c3\u30af\u304c\u3042\u308a\u3001\u305d\u3046\u3044\u3063\u305f\u3082\u306e\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u3092\u5224\u5225\u3057\u3066\u3044\u307e\u3059\u3002DKIM\u306e\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u78ba\u5b9f\u306b\u81ea\u5206\u304c\u9001\u3063\u305f\u30e1\u30fc\u30eb\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u306a\u3089\u306a\u3044\u3068\u3044\u3046\u4fdd\u8a3c\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u5927\u304d\u304f\u8ff7\u60d1\u30e1\u30fc\u30eb\u3067\u3042\u308b\u3068\u5224\u65ad\u3055\u308c\u308b\u53ef\u80fd\u6027\u3092\u4e0b\u3052\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u3002\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u81ea\u4f53\u306b\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u3042\u308a\u307e\u305b\u3093\u306e\u3067\u3001SPF\u3084DKIM\u3001DMARC\u306f\u7a4d\u6975\u7684\u306b\u5229\u7528\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2024\u5e74\u4ee5\u964d\u3001Gmail\u3084Yahoo!\u30e1\u30fc\u30eb\u3067\u306f\u3053\u3046\u3057\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u507d\u88c5\u3092\u9632\u3050\u6280\u8853\u306e\u53b3\u683c\u306a\u691c\u8a3c\u304c\u4e88\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3055\u304f\u3089\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u3067\u306fSPF\u306f\u3059\u3067\u306b\u5229\u7528\u3067\u304d\u3001\u3055\u3089\u306b2024\u5e741\u6708\u672b\u3092\u76ee\u51e6\u306bDKIM,DMARC\u306e\u8a2d\u5b9a\u304c\u53ef\u80fd\u306a\u6a5f\u80fd\u3092\u958b\u767a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/help.sakura.ad.jp\/domain\/2306\/\">SPF\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u305f\u3044 | \u3055\u304f\u3089\u306e\u30b5\u30dd\u30fc\u30c8\u60c5\u5831<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u8ff7\u60d1\u30e1\u30fc\u30eb\u632f\u308a\u5206\u3051\u306e\u4ed5\u7d44\u307f \u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u306f\u300c\u52dd\u624b\u306b\u5165\u308b\u5834\u5408\u300d\u3068\u300c\u81ea\u5206\u3067\u5165\u308c\u308b\u5834\u5408\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u5ea6\u81ea\u5206\u3067\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u632f\u308a\u5206\u3051\u308b\u3068\u6b21\u304b\u3089\u540c\u3058\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306f\u81ea\u52d5\u7684\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u308b\u3068\u3044\u3046\u5834&#8230; <a class=\"view-article\" href=\"https:\/\/rs.sakura.ad.jp\/column\/rs\/spf-dkim-dmarc\/\">View Article<\/a>","protected":false},"author":4,"featured_media":2546,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[7,18,34,11,23],"coauthors":[17],"class_list":["post-2459","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rs","tag-web-design","tag-security","tag-mail","tag-rs","tag-beginner"],"acf":[],"_links":{"self":[{"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/posts\/2459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/comments?post=2459"}],"version-history":[{"count":24,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/posts\/2459\/revisions"}],"predecessor-version":[{"id":3285,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/posts\/2459\/revisions\/3285"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/media\/2546"}],"wp:attachment":[{"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/media?parent=2459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/categories?post=2459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/tags?post=2459"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/rs.sakura.ad.jp\/column\/wp-json\/wp\/v2\/coauthors?post=2459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}