{"id":5632,"date":"2026-07-27T11:33:13","date_gmt":"2026-07-27T02:33:13","guid":{"rendered":"http:\/\/www.code-plus.jp\/240909\/?p=5632"},"modified":"2026-07-27T11:33:13","modified_gmt":"2026-07-27T02:33:13","slug":"email-colorfulbox-5632","status":"publish","type":"post","link":"https:\/\/code-plus.jp\/gp\/email-colorfulbox-5632\/","title":{"rendered":"\u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9\u3067SPF\u30fbDKIM\u30fbDMARC\u306e\u30e1\u30fc\u30eb\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3010Gmail\u5bfe\u5fdc\u3011"},"content":{"rendered":"<!--\ntitle: \u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9\u306eSPF\u30fbDKIM\u30fbDMARC\u8a2d\u5b9a\u624b\u9806\uff5c\u4e00\u62ec\u767b\u9332\u3068\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u6ce8\u610f\u70b9\ndescription: \u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u300cDMARC\u8a2d\u5b9a\u300d\u304b\u3089SPF\u30fbDKIM\u30fbDMARC\u3092\u4e00\u62ec\u767b\u9332\u3059\u308b\u624b\u9806\u3092\u3001\u5b9f\u969b\u306e\u7ba1\u7406\u753b\u9762\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u4ed8\u304d\u3067\u89e3\u8aac\u3002\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u30b5\u30a4\u30c8\u304c\u8868\u793a\u3055\u308c\u306a\u304f\u306a\u308b\u30b1\u30fc\u30b9\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u3001MXToolbox\u3067\u306e\u78ba\u8a8d\u65b9\u6cd5\u307e\u3067\u307e\u3068\u3081\u307e\u3057\u305f\u3002\ntags: \u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9,SPF,DKIM,DMARC,\u30e1\u30fc\u30eb\u8a8d\u8a3c,DNS\u8a2d\u5b9a,\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3,\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9,Gmail\u30a8\u30e9\u30fc,550 5.7.26,MXToolbox,\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc\n-->\n\n<p>2024\u5e74\u4ee5\u964d\u3001Gmail\u306fSPF\u307e\u305f\u306fDKIM\u306b\u3088\u308b\u9001\u4fe1\u8005\u8a8d\u8a3c\u304c\u901a\u3089\u306a\u3044\u30e1\u30fc\u30eb\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u8a8d\u8a3c\u304c\u672a\u8a2d\u5b9a\u3060\u3068\u3001\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u304c\u6b21\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u3067\u5f3e\u304d\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-\">550-5.7.26 Your email has been blocked because the sender is unauthenticated.\n550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM.<\/code><\/pre>\n<p>\u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9\u306f2024\u5e742\u6708\u306b\u300cDMARC\u8a2d\u5b9a\u300d\u6a5f\u80fd\u3092\u8ffd\u52a0\u3057\u3066\u304a\u308a\u3001\u73fe\u5728\u306f\u7ba1\u7406\u753b\u9762\u304b\u3089SPF\u30fbDKIM\u30fbDMARC\u306e3\u3064\u3092\u307e\u3068\u3081\u3066\u767b\u9332\u3067\u304d\u307e\u3059\u3002\u4ee5\u524d\u306e\u3088\u3046\u306bDNS\u3078\u624b\u4f5c\u696d\u3067TXT\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u73fe\u884c\u30d1\u30cd\u30eb\u3067\u306e\u624b\u9806\u306b\u52a0\u3048\u3066\u3001<b class=\"fw-600\">\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u8a2d\u5b9a\u3057\u305f\u3068\u304d\u306b\u30b5\u30a4\u30c8\u304c\u8868\u793a\u3055\u308c\u306a\u304f\u306a\u308b\u30b1\u30fc\u30b9<\/b>\u306b\u3064\u3044\u3066\u3082\u6271\u3044\u307e\u3059\u3002\u624b\u9806\u81ea\u4f53\u306f\u6570\u5206\u3067\u7d42\u308f\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u843d\u3068\u3057\u7a74\u3092\u77e5\u3089\u306a\u3044\u3068\u5fa9\u65e7\u306b\u6642\u9593\u3092\u53d6\u3089\u308c\u307e\u3059\u3002<\/p>\n\n<!-- \u2756\u76ee\u6b21\u30ea\u30b9\u30c8 -->\n<ul class=\"tocList mt-1.5r\" data-toc-id=\"js-tocBWGD\" style=\"height:42rem\"><\/ul>\n<ins class=\"tocBtn is-fixed\" data-toc-id=\"js-tocBWGD\"><\/ins>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u8a2d\u5b9a\u3059\u308b3\u3064\u306e\u8a8d\u8a3c<\/h2>\n<table class=\"table my-0.75r\">\n  <thead>\n  <tr class=\"rung\">\n    <th>\u8a8d\u8a3c<\/th>\n    <td>\u5f79\u5272<\/td>\n  <\/tr>\n<\/thead><tbody>\n<tr class=\"rung\">\n  <th>SPF<\/th>\n  <td>\u9001\u4fe1\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u6b63\u898f\u306e\u3082\u306e\u304b\u3092\u8a3c\u660e\u3059\u308b<\/td>\n<\/tr><tr class=\"rung\">\n<th>DKIM<\/th>\n<td>\u30e1\u30fc\u30eb\u306b\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u4e0e\u3057\u3001\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b<\/td>\n<\/tr><tr class=\"rung\">\n<th>DMARC<\/th>\n<td>SPF\u30fbDKIM\u306e\u7d50\u679c\u306b\u57fa\u3065\u304d\u3001\u8a8d\u8a3c\u5931\u6557\u6642\u306e\u52d5\u4f5c\u3092\u5b9a\u7fa9\u3059\u308b<\/td>\n<\/tr>\n<\/tbody><\/table>\n<p>Gmail\u306e\u8981\u4ef6\u306fSPF\u307e\u305f\u306fDKIM\u306e\u3069\u3061\u3089\u304b\u304c\u901a\u308b\u3053\u3068\u3067\u3059\u304c\u3001\u306a\u308a\u3059\u307e\u3057\u5bfe\u7b56\u3068\u5230\u9054\u7387\u3092\u8003\u3048\u308b\u30683\u3064\u63c3\u3048\u3066\u304a\u304f\u306e\u304c\u7121\u96e3\u3067\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u300cDMARC\u8a2d\u5b9a\u300d\u3068\u300cDNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u300d\u306e\u3069\u3061\u3089\u3092\u4f7f\u3046\u304b<\/h2>\n<p>\u7ba1\u7406\u753b\u9762\u306e\u5de6\u30e1\u30cb\u30e5\u30fc\u306b\u306f\u300cDMARC\u8a2d\u5b9a\u300d\u3068\u300cDNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u300d\u304c\u4e26\u3093\u3067\u3044\u307e\u3059\u3002\u540d\u524d\u3060\u3051\u898b\u308b\u3068DMARC\u3057\u304b\u8a2d\u5b9a\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u601d\u3048\u307e\u3059\u304c\u3001<b class=\"fw-600\">SPF\u30fbDKIM\u30fbDMARC\u306e3\u3064\u3092\u307e\u3068\u3081\u3066\u6271\u3046\u306e\u306f\u300cDMARC\u8a2d\u5b9a\u300d\u306e\u65b9<\/b>\u3067\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-192225.jpg?ver=20261027192823\" alt=\"\u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u30de\u30a4\u30da\u30fc\u30b8\u3002\u5de6\u30e1\u30cb\u30e5\u30fc\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u6b04\u306b\u300cDMARC\u8a2d\u5b9a\u300d\u3068\u300cDNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u300d\u304c\u4e26\u3093\u3067\u3044\u308b\"><\/picture><\/p>\n\n<p>\u300cDNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u300d\u306fDNS\u30ec\u30b3\u30fc\u30c9\u3092\u76f4\u63a5\u7de8\u96c6\u3059\u308b\u753b\u9762\u3067\u3001\u5f8c\u534a\u3067\u767b\u9332\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u305f\u308a\u4fee\u6b63\u3057\u305f\u308a\u3059\u308b\u3068\u304d\u306b\u4f7f\u3044\u307e\u3059\u3002\u307e\u305a\u306f\u300cDMARC\u8a2d\u5b9a\u300d\u304b\u3089\u59cb\u3081\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u3053\u306e\u6a5f\u80fd\u306f\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u306e\u307f\u304c\u5bfe\u8c61\u3067\u3001\u521d\u671f\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\uff08\u25cb\u25cb\u25cb.cfbx.jp\uff09\u306b\u306f\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u624b\u98061. DMARC\u8a2d\u5b9a\u3092\u958b\u304f<\/h2>\n<p>\u30de\u30a4\u30da\u30fc\u30b8\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u300c\u30b5\u30fc\u30d3\u30b9\u300d\u304b\u3089\u5bfe\u8c61\u306e\u30b5\u30fc\u30d0\u30fc\u30d7\u30e9\u30f3\u306e\u300c\u5951\u7d04\u4e2d\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\u5de6\u30e1\u30cb\u30e5\u30fc\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u6b04\u306b\u3042\u308b\u300cDMARC\u8a2d\u5b9a\u300d\u3092\u958b\u304f\u3068\u3001\u305d\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u7d10\u3065\u304f\u30c9\u30e1\u30a4\u30f3\u306e\u4e00\u89a7\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-192931.jpg?ver=20261027192823\" alt=\"DMARC\u8a2d\u5b9a\u306e\u753b\u9762\u3002\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306b\u300c\u672a\u8a2d\u5b9a(SPF,DKIM)\u300d\u300c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u300d\u306a\u3069\u306e\u72b6\u614b\u3068\u3001\u4ed6\u793eDNS\uff0fDNS Manager\u306e\u30dc\u30bf\u30f3\u304c\u4e26\u3076\"><\/picture><\/p>\n\n<p>\u5404\u30c9\u30e1\u30a4\u30f3\u306e\u72b6\u614b\u306f\u6b21\u306e3\u7a2e\u985e\u3067\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<table class=\"table my-0.75r\">\n  <thead>\n  <tr class=\"rung\">\n    <th>\u8868\u793a<\/th>\n    <td>\u610f\u5473<\/td>\n  <\/tr>\n<\/thead><tbody>\n<tr class=\"rung\">\n  <th>\u672a\u8a2d\u5b9a(SPF,DKIM)<\/th>\n  <td>\u62ec\u5f27\u5185\u306e\u8a8d\u8a3c\u304c\u672a\u767b\u9332<\/td>\n<\/tr><tr class=\"rung\">\n<th>\u8a2d\u5b9a\u6e08\u307f<\/th>\n<td>3\u3064\u3068\u3082\u767b\u9332\u6e08\u307f<\/td>\n<\/tr><tr class=\"rung\">\n<th>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8<\/th>\n<td>\u73fe\u5728\u306eDNS\u72b6\u614b\u3092\u53d6\u5f97\u3067\u304d\u306a\u304b\u3063\u305f<\/td>\n<\/tr>\n<\/tbody><\/table>\n<p>\u300c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u300d\u306f\u8a2d\u5b9a\u306e\u5931\u6557\u3067\u306f\u306a\u304f\u3001\u72b6\u614b\u306e\u78ba\u8a8d\u306b\u5931\u6557\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002\u300c\u518d\u53d6\u5f97\u300d\u3092\u62bc\u3059\u304b\u3001\u30da\u30fc\u30b8\u3092\u8aad\u307f\u8fbc\u307f\u76f4\u3059\u3068\u89e3\u6d88\u3057\u307e\u3059\u3002\u72b6\u614b\u306e\u53d6\u5f97\u304c\u7d42\u308f\u308b\u307e\u3067\u53f3\u5074\u306e\u30dc\u30bf\u30f3\u306f\u62bc\u305b\u306a\u3044\u305f\u3081\u3001\u30c9\u30e1\u30a4\u30f3\u6570\u304c\u591a\u3044\u3068\u8868\u793a\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u624b\u98062. SPF\u30fbDKIM\u30fbDMARC\u3092\u4e00\u62ec\u767b\u9332\u3059\u308b<\/h2>\n<p>\u5bfe\u8c61\u30c9\u30e1\u30a4\u30f3\u306e\u884c\u306b\u3042\u308b\u300cDNS Manager\u300d\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u767b\u9332\u3055\u308c\u308b\u5024\u304c\u30e2\u30fc\u30c0\u30eb\u3067\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-194155.jpg?ver=20261027192823\" alt=\"DMARC\u8a2d\u5b9a\u306e\u30e2\u30fc\u30c0\u30eb\u3002DKIM\u30fbSPF\u30fbDMARC\u305d\u308c\u305e\u308c\u306e\u540d\u524d\u3068\u5024\u3001\u304a\u3088\u3073\u300cDNS Manager\u306b\u8a2d\u5b9a\u3059\u308b\u300d\u30dc\u30bf\u30f3\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u308b\"><\/picture><\/p>\n\n<p>\u3053\u3053\u3067\u300cDNS Manager\u306b\u8a2d\u5b9a\u3059\u308b\u300d\u3092\u62bc\u3059\u3068\u30013\u3064\u306eTXT\u30ec\u30b3\u30fc\u30c9\u304c\u81ea\u52d5\u3067DNS\u306b\u767b\u9332\u3055\u308c\u307e\u3059\u3002IP\u30a2\u30c9\u30ec\u30b9\u3084DKIM\u306e\u516c\u958b\u9375\u3092\u81ea\u5206\u3067\u8abf\u3079\u3066\u5165\u529b\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u78ba\u8a8d\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u300cOK\u300d\u3092\u62bc\u3057\u3001\u72b6\u614b\u304c\u300c\u8a2d\u5b9a\u6e08\u307f\u300d\u306b\u5909\u308f\u308c\u3070\u5b8c\u4e86\u3067\u3059\u3002<\/p>\n<p>\u500b\u5225\u306b\u767b\u9332\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u5404\u9805\u76ee\u306e\u53f3\u306b\u3042\u308b\u300c\u30b3\u30d4\u30fc\u300d\u3067\u5024\u3092\u63a7\u3048\u3066\u3001DNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u304b\u3089\u624b\u52d5\u3067TXT\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u3092\u4ed6\u793e\u306eDNS\u3067\u7ba1\u7406\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u300cDNS Manager\u300d\u3067\u306f\u306a\u304f\u300c\u4ed6\u793eDNS\u300d\u30dc\u30bf\u30f3\u304b\u3089\u5024\u3092\u30b3\u30d4\u30fc\u3057\u3001\u305d\u3061\u3089\u306e\u7ba1\u7406\u753b\u9762\u3067\u767b\u9332\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"fz-ml\">\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306f1\u3064\u305a\u3064\u8a2d\u5b9a\u3059\u308b<\/h3>\n<p>\u898b\u843d\u3068\u3057\u3084\u3059\u3044\u306e\u3067\u3059\u304c\u3001<b class=\"fw-600\">SPF\u3068DKIM\u306f\u89aa\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3078\u7d99\u627f\u3055\u308c\u307e\u305b\u3093<\/b>\u3002<code>example.jp<\/code> \u306b\u8a2d\u5b9a\u3057\u3066\u3082\u3001<code>shop.example.jp<\/code> \u304b\u3089\u9001\u308b\u30e1\u30fc\u30eb\u306f\u8a8d\u8a3c\u3055\u308c\u306a\u3044\u307e\u307e\u3067\u3059\u3002<\/p>\n<p>Gmail\u306f\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u898b\u3066\u5224\u5b9a\u3059\u308b\u305f\u3081\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u540d\u7fa9\u3067\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u3044\u308b\u306a\u3089\u3001\u305d\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u4e00\u89a7\u304b\u3089\u9078\u3093\u3067\u500b\u5225\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u5224\u65ad\u306b\u8ff7\u3063\u305f\u3089\u3001\u30d5\u30a9\u30fc\u30e0\u3084WordPress\u306e\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\uff08From\uff09\u304c\u3069\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u4e00\u65b9\u3067DMARC\u306f\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u5c02\u7528\u306e <code>_dmarc<\/code> \u30ec\u30b3\u30fc\u30c9\u304c\u306a\u3051\u308c\u3070\u89aa\u30c9\u30e1\u30a4\u30f3\u306e\u30dd\u30ea\u30b7\u30fc\u304c\u7d99\u627f\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081 <code>_dmarc.shop<\/code> \u306e\u3088\u3046\u306a\u30ec\u30b3\u30fc\u30c9\u3092\u5225\u9014\u7528\u610f\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u624b\u98063. \u767b\u9332\u3055\u308c\u305f\u5185\u5bb9\u3092\u78ba\u8a8d\u3059\u308b<\/h2>\n<p>\u300cDNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u300d\u304b\u3089\u5bfe\u8c61\u30be\u30fc\u30f3\u3092\u958b\u304f\u3068\u3001\u8ffd\u52a0\u3055\u308c\u305f\u30ec\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-194950.jpg?ver=20261027192823\" alt=\"DNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306e\u30be\u30fc\u30f3\u7de8\u96c6\u753b\u9762\u3002_dmarc\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u540d\u306eSPF\u3001default._domainkey\u306eDKIM\u304cTXT\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u767b\u9332\u3055\u308c\u3066\u3044\u308b\"><\/picture><\/p>\n\n<p>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3 <code>shop<\/code> \u306b\u8a2d\u5b9a\u3057\u305f\u5834\u5408\u3001\u6b21\u306e3\u4ef6\u304c\u767b\u9332\u3055\u308c\u307e\u3059\u3002<\/p>\n<table class=\"table my-0.75r\">\n  <thead>\n  <tr class=\"rung\">\n    <th>\u540d\u524d<\/th>\n    <td>\u30bf\u30a4\u30d7<\/td>\n    <td>\u5185\u5bb9<\/td>\n  <\/tr>\n<\/thead><tbody>\n<tr class=\"rung\">\n  <th><code>shop<\/code><\/th>\n  <td>TXT<\/td>\n  <td><code>v=spf1 ip4:&lsqb;\u30b5\u30fc\u30d0\u30fc\u306eIP&rsqb; include:_spf.cbsv.jp ~all<\/code><\/td>\n<\/tr><tr class=\"rung\">\n<th><code>default._domainkey.shop<\/code><\/th>\n<td>TXT<\/td>\n<td><code>v=DKIM1; k=rsa; p=&lsqb;\u516c\u958b\u9375&rsqb;<\/code><\/td>\n<\/tr><tr class=\"rung\">\n<th><code>_dmarc<\/code><\/th>\n<td>TXT<\/td>\n<td><code>v=DMARC1; p=none; rua=mailto:...<\/code><\/td>\n<\/tr>\n<\/tbody><\/table>\n<p>DKIM\u306e\u30bb\u30ec\u30af\u30bf\u306f <code>default<\/code> \u3067\u3059\u3002\u5f8c\u8ff0\u306e\u78ba\u8a8d\u30c4\u30fc\u30eb\u3067\u5165\u529b\u3092\u6c42\u3081\u3089\u308c\u308b\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u624b\u98064. DMARC\u306e\u30ec\u30dd\u30fc\u30c8\u9001\u4fe1\u5148\u3092\u5b9f\u5728\u3059\u308b\u30a2\u30c9\u30ec\u30b9\u306b\u76f4\u3059<\/h2>\n<p>\u4e00\u62ec\u767b\u9332\u3092\u4f7f\u3046\u3068\u3001DMARC\u306e <code>rua<\/code>\uff08\u30ec\u30dd\u30fc\u30c8\u9001\u4fe1\u5148\uff09\u306b <code>dmarc-reports@\u30c9\u30e1\u30a4\u30f3\u540d<\/code> \u304c\u81ea\u52d5\u3067\u5165\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3053\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u81ea\u52d5\u3067\u306f\u4f5c\u3089\u308c\u306a\u3044\u305f\u3081\u3001\u305d\u306e\u307e\u307e\u3060\u3068\u30ec\u30dd\u30fc\u30c8\u304c\u3069\u3053\u306b\u3082\u5c4a\u304d\u307e\u305b\u3093\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-194345.jpg?ver=20261027192823\" alt=\"cPanel\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u30a2\u30ab\u30a6\u30f3\u30c8\u4e00\u89a7\u3002\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306b\u4f5c\u6210\u6e08\u307f\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u4e26\u3093\u3067\u3044\u308b\"><\/picture><\/p>\n\n<p>\u30e1\u30fc\u30eb\u30a2\u30ab\u30a6\u30f3\u30c8\u4e00\u89a7\u3067\u5b9f\u5728\u3059\u308b\u30a2\u30c9\u30ec\u30b9\u3092\u78ba\u8a8d\u3057\u3001DNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3067 <code>_dmarc<\/code> \u30ec\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-195212.jpg?ver=20261027192823\" alt=\"DNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306e\u30c8\u30c3\u30d7\u753b\u9762\u3002\u30be\u30fc\u30f3\u306e\u72b6\u614b\u3068\u30ec\u30b3\u30fc\u30c9\u7a2e\u5225\u3054\u3068\u306e\u767b\u9332\u6570\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u308b\"><\/picture><\/p>\n\n<pre><code class=\"language-\">\"v=DMARC1; p=none; rua=mailto:admin@example.jp\"<\/code><\/pre>\n<p><code>rua<\/code> \u306f\u30ec\u30dd\u30fc\u30c8\u306e\u5b9b\u5148\u3092\u6307\u5b9a\u3059\u308b\u3060\u3051\u306a\u306e\u3067\u3001\u30e1\u30fc\u30eb\u304c\u5c4a\u304f\u304b\u3069\u3046\u304b\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002\u53d7\u3051\u53d6\u308c\u308b\u30a2\u30c9\u30ec\u30b9\u304c\u307e\u3060\u306a\u3044\u5834\u5408\u306f\u3001<code>v=DMARC1; p=none;<\/code> \u306e\u307e\u307e\u306b\u3057\u3066\u304a\u3044\u3066\u5f8c\u304b\u3089\u8ffd\u52a0\u3057\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u6307\u5b9a\u3059\u308b\u30a2\u30c9\u30ec\u30b9\u306f\u540c\u3058\u30c9\u30e1\u30a4\u30f3\u3067\u3042\u308b\u5fc5\u8981\u3082\u306a\u304f\u3001\u5b9f\u969b\u306b\u53d7\u4fe1\u3067\u304d\u308b\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308c\u3070\u5927\u4e08\u592b\u3067\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u6ce8\u610f\u70b9\uff1a\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u30b5\u30a4\u30c8\u304c\u8868\u793a\u3055\u308c\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308b<\/h2>\n<p>\u3053\u3053\u304c\u6700\u5927\u306e\u843d\u3068\u3057\u7a74\u3067\u3059\u3002SPF\u3068DKIM\u3092\u767b\u9332\u3057\u305f\u76f4\u5f8c\u306b\u3001\u305d\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u30b5\u30a4\u30c8\u304c\u8868\u793a\u3055\u308c\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-201607.jpg?ver=20261027192823\" alt=\"Chrome\u306e\u30a8\u30e9\u30fc\u753b\u9762\u3002\u300c\u3053\u306e\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u300d\u300cERR_NAME_NOT_RESOLVED\u300d\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308b\"><\/picture><\/p>\n\n<h3 class=\"fz-ml\">\u539f\u56e0\u306f\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306eA\u30ec\u30b3\u30fc\u30c9<\/h3>\n<p>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u500b\u5225\u306eA\u30ec\u30b3\u30fc\u30c9\u3067\u306f\u306a\u304f\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\uff08<code>*<\/code> \u306eA\u30ec\u30b3\u30fc\u30c9\uff09\u3067\u307e\u3068\u3081\u3066\u904b\u7528\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u306f\u73cd\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002<code>*<\/code> \u304c\u3042\u308c\u3070 <code>shop.example.jp<\/code> \u3082 <code>www.shop.example.jp<\/code> \u3082\u540c\u3058IP\u306b\u89e3\u6c7a\u3055\u308c\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u3068\u3053\u308d\u304cSPF\u3084DKIM\u306eTXT\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u3068\u3001<code>shop.example.jp<\/code> \u3068\u3044\u3046\u30ce\u30fc\u30c9\u304c\u30be\u30fc\u30f3\u4e0a\u306b\u5b9f\u5728\u3059\u308b\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002DNS\u306e\u4ed5\u69d8\u3067\u306f\u3001\u5b9f\u5728\u3059\u308b\u30ce\u30fc\u30c9\u306e\u914d\u4e0b\u306b\u306f\u89aa\u306e\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u304c\u9069\u7528\u3055\u308c\u307e\u305b\u3093\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u3053\u308c\u307e\u3067\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067\u89e3\u6c7a\u3057\u3066\u3044\u305fA\u30ec\u30b3\u30fc\u30c9\u304c\u5f15\u3051\u306a\u304f\u306a\u308a\u3001\u540d\u524d\u89e3\u6c7a\u306b\u5931\u6557\u3057\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u8a2d\u5b9a\u305d\u306e\u3082\u306e\u306f\u6b63\u3057\u304f\u3001A\u30ec\u30b3\u30fc\u30c9\u3060\u3051\u304c\u5931\u308f\u308c\u305f\u72b6\u614b\u3067\u3059\u3002<\/p>\n<h3 class=\"fz-ml\">\u5bfe\u51e6\uff1aA\u30ec\u30b3\u30fc\u30c9\u3092\u660e\u793a\u7684\u306b\u8ffd\u52a0\u3059\u308b<\/h3>\n<p>DNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306e\u300c\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u300d\u304b\u3089\u3001A\u30ec\u30b3\u30fc\u30c9\u3092\u76f4\u63a5\u767b\u9332\u3057\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-202359.jpg?ver=20261027192823\" alt=\"DNS\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306eAdd Record\u30e2\u30fc\u30c0\u30eb\u3002\u30bf\u30a4\u30d7A\u3001\u540d\u524d\u3001TTL\u3001\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3059\u308b\"><\/picture><\/p>\n\n<table class=\"table my-0.75r\">\n  <thead>\n  <tr class=\"rung\">\n    <th>\u540d\u524d<\/th>\n    <td>\u30bf\u30a4\u30d7<\/td>\n    <td>TTL<\/td>\n    <td>\u30a2\u30c9\u30ec\u30b9<\/td>\n  <\/tr>\n<\/thead><tbody>\n<tr class=\"rung\">\n  <th><code>shop<\/code><\/th>\n  <td>A<\/td>\n  <td>3600<\/td>\n  <td>\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9<\/td>\n<\/tr><tr class=\"rung\">\n<th><code>www.shop<\/code><\/th>\n<td>A<\/td>\n<td>3600<\/td>\n<td>\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9<\/td>\n<\/tr>\n<\/tbody><\/table>\n<p><code>www<\/code> \u3042\u308a\u30fb\u306a\u3057\u306e\u4e21\u65b9\u3092\u4f7f\u3063\u3066\u3044\u308b\u306a\u3089\u30012\u4ef6\u3068\u3082\u767b\u9332\u3057\u307e\u3059\u3002\u8ffd\u52a0\u5f8c\u306e\u30be\u30fc\u30f3\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-202647.jpg?ver=20261027192823\" alt=\"A\u30ec\u30b3\u30fc\u30c9\u8ffd\u52a0\u5f8c\u306e\u30be\u30fc\u30f3\u7de8\u96c6\u753b\u9762\u3002\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306eA\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3068www\u4ed8\u304d\u306eA\u30ec\u30b3\u30fc\u30c9\u304c\u4e26\u3093\u3067\u3044\u308b\"><\/picture><\/p>\n\n<p>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067\u904b\u7528\u3057\u3066\u3044\u308b\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306f\u3001\u8a8d\u8a3c\u8a2d\u5b9a\u306e\u305f\u3073\u306b\u540c\u3058\u73fe\u8c61\u304c\u8d77\u304d\u307e\u3059\u3002<b class=\"fw-600\">SPF\u30fbDKIM\u306e\u767b\u9332\u3068\u3001A\u30ec\u30b3\u30fc\u30c9\u304a\u3088\u3073www\u306eA\u30ec\u30b3\u30fc\u30c9\u306e\u8ffd\u52a0\u306f\u30bb\u30c3\u30c8\u3067\u884c\u3046<\/b>\u3068\u899a\u3048\u3066\u304a\u304f\u3068\u4e8b\u6545\u3092\u9632\u3052\u307e\u3059\u3002<\/p>\n<h3 class=\"fz-ml\">\u5fa9\u65e7\u3057\u306a\u3044\u3068\u304d\u306fDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u7591\u3046<\/h3>\n<p>\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u3082\u30a8\u30e9\u30fc\u304c\u7d9a\u304f\u5834\u5408\u3001\u624b\u5143\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u300c\u898b\u3064\u304b\u3089\u306a\u3044\u300d\u3068\u3044\u3046\u7d50\u679c\u304c\u6b8b\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30b7\u30fc\u30af\u30ec\u30c3\u30c8\u30e2\u30fc\u30c9\u306fCookie\u3092\u6d88\u3059\u3060\u3051\u3067DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u306f\u5f71\u97ff\u3057\u306a\u3044\u305f\u3081\u3001\u5207\u308a\u5206\u3051\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u307e\u305a\u6a29\u5a01\u30b5\u30fc\u30d0\u30fc\u3078\u76f4\u63a5\u554f\u3044\u5408\u308f\u305b\u3066\u3001\u8a2d\u5b9a\u5074\u304c\u6b63\u3057\u3044\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">dig @ns1.cbsv.jp www.shop.example.jp +short<\/code><\/pre>\n<p>\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u8fd4\u308c\u3070\u3001DNS\u5074\u306e\u8a2d\u5b9a\u306f\u5b8c\u4e86\u3057\u3066\u3044\u307e\u3059\u3002\u3042\u3068\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d88\u3059\u3060\u3051\u3067\u3059\u3002macOS\u306e\u5834\u5408\u306f\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067\u89e3\u6d88\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder<\/code><\/pre>\n<p>Chrome\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u306f <code>chrome:\/\/net-internals\/#dns<\/code> \u306e\u300cClear host cache\u300d\u3082\u4f75\u7528\u3057\u307e\u3059\u3002\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306e\u30e2\u30d0\u30a4\u30eb\u56de\u7dda\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3057\u3066\u8868\u793a\u3055\u308c\u308b\u304b\u3092\u8a66\u3059\u3068\u3001\u624b\u5143\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u554f\u984c\u304b\u3069\u3046\u304b\u3092\u7d20\u65e9\u304f\u5207\u308a\u5206\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u8a2d\u5b9a\u306e\u78ba\u8a8d\u65b9\u6cd5<\/h2>\n<p>DNS\u306e\u53cd\u6620\u306b\u306f\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u65b0\u898f\u306b\u8ffd\u52a0\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u306f\u6570\u5206\u304b\u30891\u6642\u9593\u7a0b\u5ea6\u3067\u53c2\u7167\u3067\u304d\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u65e2\u5b58\u30ec\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u63db\u3048\u305f\u5834\u5408\u306fTTL\u306e\u5206\u3060\u3051\u53e4\u3044\u5024\u304c\u6b8b\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"fz-ml\">MXToolbox\u3067\u78ba\u8a8d\u3059\u308b<\/h3>\n<p><cite><a href=\"https:\/\/mxtoolbox.com\/\" target=\"_blank\" class=\"link\">MXToolbox<\/a><\/cite> \u306e SPF Lookup \u3068 DKIM Lookup \u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260723-100903.jpg?ver=20261027192823\" alt=\"MXToolbox\u306eSPF Lookup\u7d50\u679c\u3002ip4\u3068include\u304cPass\u3001\u5404\u30c6\u30b9\u30c8\u9805\u76ee\u306b\u7dd1\u306e\u30c1\u30a7\u30c3\u30af\u304c\u4e26\u3093\u3067\u3044\u308b\"><\/picture><\/p>\n\n<p>DKIM Lookup \u3067\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u3068\u30bb\u30ec\u30af\u30bf\u3092 <code>example.jp:default<\/code> \u306e\u5f62\u5f0f\u3067\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260723-101137.jpg?ver=20261027192823\" alt=\"MXToolbox\u306eDKIM Lookup\u7d50\u679c\u3002DKIM\u30ec\u30b3\u30fc\u30c9\u516c\u958b\u3001\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u3001\u516c\u958b\u9375\u30c1\u30a7\u30c3\u30af\u304c\u3059\u3079\u3066\u6210\u529f\u3057\u3066\u3044\u308b\"><\/picture><\/p>\n\n<p>\u306a\u304a\u3001MX Lookup\u3067\u300cDNS Record not found\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306fMX\u30ec\u30b3\u30fc\u30c9\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<\/p>\n\n<p><picture class=\"bd-bounds my-0.5r\"><img decoding=\"async\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/SS-20260722-200318.jpg?ver=20261027192823\" alt=\"MXToolbox\u306eMX Lookup\u7d50\u679c\u3002DNS Record not found\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308b\"><\/picture><\/p>\n\n<p>\u9001\u4fe1\u5c02\u7528\u3067\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u306f\u53d7\u4fe1\u3057\u3066\u3044\u306a\u3044\u69cb\u6210\u3067\u3042\u308c\u3070\u3001MX\u30ec\u30b3\u30fc\u30c9\u304c\u306a\u304f\u3066\u3082\u9001\u4fe1\u8a8d\u8a3c\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002SPF\u3068DKIM\u306e\u7d50\u679c\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 class=\"fz-ml\">\u5b9f\u969b\u306e\u30e1\u30fc\u30eb\u3067\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u6700\u7d42\u7684\u306a\u7b54\u3048\u5408\u308f\u305b\u306f\u3001Gmail\u306b\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\u3067\u884c\u3046\u306e\u304c\u78ba\u5b9f\u3067\u3059\u3002\u30e1\u30fc\u30eb\u3092\u958b\u3044\u3066\u300c\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30bd\u30fc\u30b9\u3092\u8868\u793a\u300d\u3092\u9078\u3076\u3068\u3001<code>spf=pass<\/code> <code>dkim=pass<\/code> <code>dmarc=pass<\/code> \u306e\u5224\u5b9a\u7d50\u679c\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u30c4\u30fc\u30eb\u306e\u7d50\u679c\u3088\u308a\u5b9f\u614b\u306b\u8fd1\u3044\u60c5\u5831\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">DMARC\u30dd\u30ea\u30b7\u30fc\u306f\u5909\u66f4\u3059\u3079\u304d\u304b<\/h2>\n<p>MXToolbox\u3067\u306f\u3001SPF\u3084DKIM\u304c\u6b63\u5e38\u3067\u3082\u300cDMARC Policy Not Enabled\u300d\u3068\u3044\u3046\u8b66\u544a\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f <code>quarantine<\/code> \u304b <code>reject<\/code> \u306e\u4f7f\u7528\u3092\u63a8\u5968\u3059\u308b\u6848\u5185\u3067\u3001\u4e3b\u306bBIMI\uff08\u30d6\u30e9\u30f3\u30c9\u30ed\u30b4\u8868\u793a\uff09\u3092\u6709\u52b9\u306b\u3059\u308b\u305f\u3081\u306e\u6761\u4ef6\u3067\u3059\u3002\u30a8\u30e9\u30fc\u3067\u306f\u306a\u3044\u305f\u3081\u3001Gmail\u3078\u306e\u5230\u9054\u3092\u76ee\u7684\u306b\u3057\u3066\u3044\u308b\u306a\u3089 <code>p=none<\/code> \u306e\u307e\u307e\u3067\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p><b class=\"fw-600\">\u3080\u3057\u308d\u3001\u672a\u8a2d\u5b9a\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304c\u6b8b\u3063\u3066\u3044\u308b\u72b6\u614b\u3067\u53b3\u683c\u5316\u3059\u308b\u306e\u306f\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002<\/b> \u89aa\u30c9\u30e1\u30a4\u30f3\u306eDMARC\u30dd\u30ea\u30b7\u30fc\u306f\u3001\u5c02\u7528\u306e <code>_dmarc<\/code> \u3092\u6301\u305f\u306a\u3044\u3059\u3079\u3066\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u7d99\u627f\u3055\u308c\u307e\u3059\u3002<code>p=reject<\/code> \u306b\u3059\u308b\u3068\u3001SPF\u30fbDKIM\u304c\u672a\u8a2d\u5b9a\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u9001\u3063\u305f\u30e1\u30fc\u30eb\u304c\u62d2\u5426\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u53b3\u683c\u5316\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u9806\u5e8f\u3067\u9032\u3081\u307e\u3059\u3002<\/p>\n<ol style=\"list-style-type:decimal;\" class=\"my-0.5r\">\n<li>\u4f7f\u7528\u3057\u3066\u3044\u308b\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3059\u3079\u3066\u306bSPF\u30fbDKIM\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<li><code>rua<\/code> \u3067\u53d7\u3051\u53d6\u308b\u30ec\u30dd\u30fc\u30c8\u30922\u9031\u9593\u304b\u30891\u304b\u6708\u307b\u3069\u78ba\u8a8d\u3057\u3001\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u308b\u6b63\u898f\u306e\u9001\u4fe1\u7d4c\u8def\u304c\u306a\u3044\u304b\u8abf\u3079\u308b<\/li>\n<li>\u554f\u984c\u304c\u306a\u3051\u308c\u3070 <code>p=quarantine<\/code> \u306b\u5909\u66f4\u3059\u308b\uff08<code>pct=25<\/code> \u306a\u3069\u304b\u3089\u6bb5\u968e\u7684\u306b\u4e0a\u3052\u308b\u3068\u5b89\u5168\uff09<\/li>\n<li>\u5341\u5206\u306b\u5b89\u5b9a\u3057\u3066\u304b\u3089 <code>p=reject<\/code> \u306b\u5909\u66f4\u3059\u308b<\/li>\n<\/ol>\n<p>SPF\u306e <code>~all<\/code> \u3068 <code>-all<\/code> \u3082\u540c\u3058\u8003\u3048\u65b9\u3067\u3059\u3002<code>~all<\/code> \u306f\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3082\u53d7\u4fe1\u3059\u308b\u8a2d\u5b9a\u3001<code>-all<\/code> \u306f\u62d2\u5426\u3059\u308b\u8a2d\u5b9a\u306a\u306e\u3067\u3001\u904b\u7528\u304c\u5b89\u5b9a\u3059\u308b\u307e\u3067\u306f <code>~all<\/code> \u306e\u307e\u307e\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n\n<hr class=\"separator mt-3r\">\n\n<h2 class=\"fz-xl\">\u307e\u3068\u3081<\/h2>\n<table class=\"table my-0.75r\">\n  <thead>\n  <tr class=\"rung\">\n    <th>\u9805\u76ee<\/th>\n    <td>\u5185\u5bb9<\/td>\n  <\/tr>\n<\/thead><tbody>\n<tr class=\"rung\">\n  <th>\u8a2d\u5b9a\u5834\u6240<\/th>\n  <td>\u30de\u30a4\u30da\u30fc\u30b8 \u2192 \u30b5\u30fc\u30d3\u30b9 \u2192 \u5951\u7d04\u4e2d \u2192 \u30a2\u30af\u30b7\u30e7\u30f3\u300cDMARC\u8a2d\u5b9a\u300d<\/td>\n<\/tr><tr class=\"rung\">\n<th>\u767b\u9332\u65b9\u6cd5<\/th>\n<td>\u5bfe\u8c61\u30c9\u30e1\u30a4\u30f3\u306e\u300cDNS Manager\u300d\u2192\u300cDNS Manager\u306b\u8a2d\u5b9a\u3059\u308b\u300d<\/td>\n<\/tr><tr class=\"rung\">\n<th>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3<\/th>\n<td>SPF\u30fbDKIM\u306f\u7d99\u627f\u3055\u308c\u306a\u3044\u305f\u3081\u500b\u5225\u306b\u8a2d\u5b9a\u3059\u308b<\/td>\n<\/tr><tr class=\"rung\">\n<th>\u8ffd\u52a0\u4f5c\u696d<\/th>\n<td>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u904b\u7528\u306a\u3089A\u30ec\u30b3\u30fc\u30c9\u3068www\u306eA\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b<\/td>\n<\/tr><tr class=\"rung\">\n<th>\u30ec\u30dd\u30fc\u30c8\u5148<\/th>\n<td><code>rua<\/code> 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class=\"linkbox-title fz-md\">\u3055\u304f\u3089\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc\uff0b\u304a\u540d\u524d.com\u3067\u3001SPF\u30fbDKIM\u30fbDMARC\u306e\u30e1\u30fc\u30eb\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3010Gmail\u5bfe\u5fdc\u3011<\/h4>\n<picture class=\"linkbox-thumbnail\">\n<img decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/f29919eaa2e9cda644d3c67d9b5e73c4.jpg?ver=20261027192823\" alt=\"\u3055\u304f\u3089\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc\uff0b\u304a\u540d\u524d.com\u3067\u3001SPF\u30fbDKIM\u30fbDMARC\u306e\u30e1\u30fc\u30eb\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3010Gmail\u5bfe\u5fdc\u3011\" loading=\"lazy\" \/>\n<\/picture>\n<span class=\"linkbox-excerpt\">\u30c9\u30e1\u30a4\u30f3\u3092\u304a\u540d\u524d.com\u3001\u30b5\u30fc\u30d0\u30fc\u3092\u3055\u304f\u3089\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc\u3067\u904b\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306eSPF\u30fbDKIM\u30fbDMARC\u8a2d\u5b9a\u624b\u9806\u3092\u89e3\u8aac\u3002\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\u3092\u304a\u540d\u524d.com\u5074\u3067\u7ba1\u7406\u3057\u3066\u3044\u308b\u69cb\u6210\u306b\u5bfe\u5fdc\u3057\u305f\u5b9f\u8df5\u7684\u306a\u8a2d\u5b9a\u30ac\u30a4\u30c9\u3067\u3059\u3002\n&emsp;<u class=\"linkbox-more\">\u7d9a\u304d\u3092\u8aad\u3080<\/u>\n<\/span>\n<\/a>","protected":false},"excerpt":{"rendered":"\u30ab\u30e9\u30d5\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc\u3067SPF\u30fbDKIM\u30fbDMARC\u306e\u30e1\u30fc\u30eb\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b\u624b\u9806\u3092\u89e3\u8aac\u30022024\u5e74\u4ee5\u964dGmail\u3078\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u8a8d\u8a3c\u304c\u5fc5\u9808\u3068\u306a\u3063\u305f\u305f\u3081\u3001\u8a2d\u5b9a\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002","protected":false},"author":1,"featured_media":15580,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[14],"tags":[116,117,118,119,120,121,113,114,115,69,71],"group":[],"pg":[],"class_list":["post-5632","post","type-post","status-publish","format-standard","has-post-thumbnail","category-develop-env","tag-dkim","tag-117","tag-spf","tag-119","tag-dns","tag-dmarc","tag-550-5-7-26","tag-gmail","tag-115","tag-69","tag-71"],"acf":[],"_links":{"self":[{"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/posts\/5632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/comments?post=5632"}],"version-history":[{"count":0,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/posts\/5632\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/media\/15580"}],"wp:attachment":[{"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/media?parent=5632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/categories?post=5632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/tags?post=5632"},{"taxonomy":"group","embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/group?post=5632"},{"taxonomy":"pg","embeddable":true,"href":"https:\/\/code-plus.jp\/gp\/wp-json\/wp\/v2\/pg?post=5632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}