{"id":29307,"date":"2026-09-28T15:15:57","date_gmt":"2026-09-28T06:15:57","guid":{"rendered":"https:\/\/motoki-design.co.jp\/wordpress\/email-header-analysis\/"},"modified":"2026-10-01T18:18:41","modified_gmt":"2026-10-01T09:18:41","slug":"email-header-analysis","status":"publish","type":"post","link":"https:\/\/motoki-design.co.jp\/wordpress\/email-header-analysis\/","title":{"rendered":"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306e\u898b\u65b9\uff5c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u3063\u305f\u539f\u56e0\u3068\u5c4a\u304f\u307e\u3067\u306e\u7d4c\u8def\u3092\u8aad\u3080\u65b9\u6cd5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5c4a\u3044\u305f\u306f\u305a\u306e\u30e1\u30fc\u30eb\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u3063\u3066\u3044\u305f\u308a\u3001\u9001\u3063\u3066\u304b\u3089\u5c4a\u304f\u307e\u3067\u306b\u4f55\u5206\u3082\u304b\u304b\u3063\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u3046\u3057\u305f\u3068\u304d\u306e\u624b\u304c\u304b\u308a\u306f\u3001\u30e1\u30fc\u30eb\u306e\u300c\u30d8\u30c3\u30c0\u30fc\u300d\u306b\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d8\u30c3\u30c0\u30fc\u306b\u306f\u3001\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u901a\u3063\u3066\u5c4a\u3044\u305f\u304b\u3068\u3001\u53d7\u3051\u53d6\u3063\u305f\u5074\u304c\u3069\u3046\u5224\u5b9a\u3057\u305f\u304b\u304c\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u53d6\u308a\u51fa\u3057\u65b9\u3068\u3001\u898b\u308b\u3079\u304d\u5834\u6240\u3001\u8cbc\u308b\u3060\u3051\u3067\u8aad\u307f\u89e3\u304f\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u4f7f\u3046<a href=\"https:\/\/motoki-design.co.jp\/tools\/mail-header\/\">\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u89e3\u6790<\/a>\u306f\u3001\u5f53\u30b5\u30a4\u30c8\u3068\u540c\u3058MOTOKI\u5408\u540c\u4f1a\u793e\u304c\u4f5c\u3063\u305f\u300c<a href=\"https:\/\/motoki-design.co.jp\/tools\/tools-list\/\">WEB\u30c4\u30fc\u30eb\u7bb1<\/a>\u300d\u306e1\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u6599\u3067\u3001\u4f1a\u54e1\u767b\u9332\u306a\u3057\u3067\u4f7f\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6700\u7d42\u78ba\u8a8d\u65e5\uff1a2026\u5e749\u670828\u65e5<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3053\u306e\u8a18\u4e8b\u3067\u5206\u304b\u308b\u3053\u3068<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gmail\u30fbOutlook\u30fbApple Mail\u3067\u306e\u30d8\u30c3\u30c0\u30fc\u306e\u53d6\u308a\u51fa\u3057\u65b9<\/li>\n\n\n<li><strong>\u30d8\u30c3\u30c0\u30fc\u3067\u6700\u521d\u306b\u898b\u308b3\u304b\u6240<\/strong><\/li>\n\n\n<li>SPF\u30fbDKIM\u30fbDMARC\u306e\u5224\u5b9a\u306e\u8aad\u307f\u65b9<\/li>\n\n\n<li>Received\u306e\u884c\u304b\u3089\u3001\u3069\u3053\u3067\u914d\u9001\u304c\u9045\u308c\u305f\u304b\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5<\/li>\n\n\n<li>\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u308b\u539f\u56e0\u306e\u5207\u308a\u5206\u3051\u65b9<\/li>\n<\/ul>\n\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -external\" data-type=\"type3\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">WEB\u30c4\u30fc\u30eb\u7bb1<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img decoding=\"async\" src=\"https:\/\/motoki-design.co.jp\/tools\/wp-content\/uploads\/2026\/09\/ogp.png\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/motoki-design.co.jp\/tools\/mail-header\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u89e3\u6790\uff5cSPF\u30fbDKIM\u7d50\u679c\u3092\u7121\u6599\u78ba\u8a8d<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u8cbc\u308a\u4ed8\u3051\u308b\u3060\u3051\u3067\u3001SPF\u30fbDKIM\u30fbDMARC\u306e\u8a8d\u8a3c\u7d50\u679c\u3001\u7d4c\u7531\u30b5\u30fc\u30d0\u30fc\u3001\u5404\u4e2d\u7d99\u306e\u9045\u5ef6\u3092\u8aad\u307f\u89e3\u304d\u307e\u3059\u3002\u306a\u305c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u3063\u305f\u304b\u306e\u539f\u56e0\u7a76\u660e\u306b\u3002\u30d6\u30e9\u30a6\u30b6&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n<h2 class=\"wp-block-heading\">\u7b54\u3048\uff5c\u898b\u308b\u306e\u306f3\u304b\u6240\u3060\u3051<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d8\u30c3\u30c0\u30fc\u306f\u9577\u304f\u3001\u6163\u308c\u306a\u3044\u3068\u8aad\u3080\u6c17\u306b\u306a\u308c\u306a\u3044\u91cf\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3001\u539f\u56e0\u3092\u63a2\u3059\u3068\u304d\u306b\u898b\u308b\u5834\u6240\u306f\u9650\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th style=\"min-width:8em !important\">\u898b\u308b\u5834\u6240<\/th><th>\u5206\u304b\u308b\u3053\u3068<\/th><\/tr><\/thead><tbody><tr><td>Authentication-Results<\/td><td>\u53d7\u3051\u53d6\u3063\u305f\u5074\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u3001SPF\u30fbDKIM\u30fbDMARC\u3092\u3069\u3046\u5224\u5b9a\u3057\u305f\u304b<\/td><\/tr><tr><td>Received\uff08\u4e0b\u304b\u3089\u4e0a\u3078\uff09<\/td><td>\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u901a\u3063\u305f\u304b\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u6642\u523b<\/td><\/tr><tr><td>From \u3068 Return-Path<\/td><td>\u898b\u305f\u76ee\u306e\u9001\u308a\u4e3b\u3068\u3001\u5b9f\u969b\u306b\u9001\u3063\u305f\u30c9\u30e1\u30a4\u30f3\u304c\u540c\u3058\u304b\u3069\u3046\u304b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e3\u304b\u6240\u3092\u8aad\u3081\u308c\u3070\u3001\u300c\u306a\u308a\u3059\u307e\u3057\u3068\u7591\u308f\u308c\u305f\u300d\u306e\u304b\u300c\u9014\u4e2d\u3067\u6b62\u307e\u3063\u3066\u3044\u305f\u300d\u306e\u304b\u3092\u5207\u308a\u5206\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d8\u30c3\u30c0\u30fc\u306e\u53d6\u308a\u51fa\u3057\u65b9<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th style=\"min-width:8em !important\">\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8<\/th><th>\u64cd\u4f5c<\/th><\/tr><\/thead><tbody><tr><td>Gmail<\/td><td>\u30e1\u30fc\u30eb\u3092\u958b\u304d\u3001\u53f3\u4e0a\u306e\u300c\ufe19\u300d\u2192\u300c\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30bd\u30fc\u30b9\u3092\u8868\u793a\u300d<\/td><\/tr><tr><td>Outlook<\/td><td>\u30e1\u30fc\u30eb\u3092\u958b\u304d\u3001\u300c\u30d5\u30a1\u30a4\u30eb\u300d\u2192\u300c\u30d7\u30ed\u30d1\u30c6\u30a3\u300d\u2192\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30d8\u30c3\u30c0\u30fc\u300d<\/td><\/tr><tr><td>Apple Mail<\/td><td>\u300c\u8868\u793a\u300d\u2192\u300c\u30e1\u30c3\u30bb\u30fc\u30b8\u300d\u2192\u300c\u3059\u3079\u3066\u306e\u30d8\u30c3\u30c0\u300d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Gmail\u306e\u300c\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30bd\u30fc\u30b9\u3092\u8868\u793a\u300d\u3067\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u3068\u672c\u6587\u304c\u307e\u3068\u3081\u3066\u51fa\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u6790\u306b\u5fc5\u8981\u306a\u30d8\u30c3\u30c0\u30fc\u3060\u3051\u3092\u4f7f\u3044\u3001\u672c\u6587\u306f\u8cbc\u308a\u4ed8\u3051\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u5b9f\u30e1\u30fc\u30eb\u3092\u5171\u6709\u3059\u308b\u5834\u5408\u306f\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u30fbMessage-ID\u30fbIP\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u516c\u958b\u7bc4\u56f2\u3082\u78ba\u8a8d\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u306e\u67b6\u7a7a\u30b5\u30f3\u30d7\u30eb\u3067\u5148\u306b\u64cd\u4f5c\u3092\u8a66\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30c4\u30fc\u30eb\u3067\u89e3\u6790\u3059\u308b\uff5c\u8cbc\u3063\u3066\u300c\u89e3\u6790\u3059\u308b\u300d\u3092\u62bc\u3059<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><a href=\"https:\/\/motoki-design.co.jp\/tools\/mail-header\/\">\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u89e3\u6790<\/a>\u3092\u958b\u304f<\/li>\n\n\n<li>\u53d6\u308a\u51fa\u3057\u305f\u30d8\u30c3\u30c0\u30fc\u3092\u5165\u529b\u6b04\u306b\u8cbc\u308b<\/li>\n\n\n<li>\u300c\u89e3\u6790\u3059\u308b\u300d\u3092\u62bc\u3059<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304b\u3089\u306f\u3001<strong>\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u4f8b<\/strong>\u3067\u8aad\u307f\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u5728\u3059\u308b\u4eba\u306e\u30e1\u30fc\u30eb\u3067\u306f\u306a\u304f\u3001\u30c9\u30e1\u30a4\u30f3\u306f\u4f8b\u793a\u7528\u306e example.com \u306a\u3069\u3092\u3001IP\u30a2\u30c9\u30ec\u30b9\u306f\u8aac\u660e\u7528\u306b\u53d6\u3063\u3066\u304a\u304b\u308c\u305f\u756a\u53f7\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\uff08example.net\uff09\u3092\u901a\u3057\u3066\u3001\u304a\u5e97\uff08example.com\uff09\u304c\u304a\u77e5\u3089\u305b\u3092\u9001\u3063\u305f\u3001\u3068\u3044\u3046\u60f3\u5b9a\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>Delivered-To: user@example.org\nReceived: from mx1.example.org\n  (mx1.example.org [203.0.113.5])\n  by mail.example.org with ESMTP\n  id B2c4; Mon, 28 Sep 2026\n  10:05:14 +0900\nReceived: from out.example.net\n  (out.example.net [198.51.100.20])\n  by mx1.example.org with ESMTPS\n  id A1b3; Mon, 28 Sep 2026\n  10:05:12 +0900\nReceived: from app.example.net\n  (app.example.net [192.0.2.10])\n  by out.example.net with ESMTP\n  id Q9z1; Mon, 28 Sep 2026\n  10:01:02 +0900\nReceived: from localhost\n  by app.example.net with ESMTP\n  id L0a0; Mon, 28 Sep 2026\n  10:01:00 +0900\nAuthentication-Results:\n  mx1.example.org;\n  spf=pass\n  smtp.mailfrom=bounce.example.net;\n  dkim=pass header.d=example.com\n  header.s=s1;\n  dmarc=pass header.from=example.com\nReturn-Path:\n  &lt;bounce-7f3a@bounce.example.net&gt;\nDKIM-Signature: v=1; a=rsa-sha256;\n  d=example.com; s=s1;\n  h=from:to:subject:date;\n  bh=\uff08\u7701\u7565\uff09; b=\uff08\u7701\u7565\uff09\nFrom: =?UTF-8?B?44K144Oz44OX44Or5ZWG5bqX?=\n  &lt;info@example.com&gt;\nTo: user@example.org\nSubject: =?UTF-8?B?MTDmnIjjga7lrprkvJHml6U=?=\nDate: Mon, 28 Sep 2026 10:01:00 +0900\nMessage-ID:\n  &lt;20260928100100.q9z1@app.example.net&gt;\nList-Unsubscribe:\n  &lt;https:\/\/example.com\/unsubscribe&gt;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30d8\u30c3\u30c0\u30fc\u306f\u3001\u4e0a\u306e\u67a0\u304b\u3089\u305d\u306e\u307e\u307e\u30b3\u30d4\u30fc\u3057\u3066\u30c4\u30fc\u30eb\u3067\u8a66\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d8\u30c3\u30c0\u30fc\u3067\u306f\u3001\u884c\u306e\u982d\u306b\u7a7a\u767d\u304c\u3042\u308b\u3068\u524d\u306e\u884c\u306e\u7d9a\u304d\u3068\u3044\u3046\u6c7a\u307e\u308a\u306a\u306e\u3067\u3001\u9577\u3044\u884c\u306f\u6298\u308a\u8fd4\u3057\u3066\u8f09\u305b\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u6790\u3057\u305f\u7d50\u679c\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"510\" height=\"924\" src=\"https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-pass.png\" alt=\"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u89e3\u6790\u306b\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u30d8\u30c3\u30c0\u30fc\u3092\u8cbc\u3063\u305f\u7d50\u679c\uff08\u8a8d\u8a3c\u306f\u3059\u3079\u3066\u901a\u904e\uff09\" class=\"wp-image-29305\" srcset=\"https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-pass.png 510w, https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-pass-382x692.png 382w\" sizes=\"(max-width: 510px) 100vw, 510px\" \/><figcaption class=\"wp-element-caption\">\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u4f8bA\u306e\u89e3\u6790\u7d50\u679c\u3002\u8a8d\u8a3c\u306f\u3059\u3079\u3066\u901a\u904e\uff082026\/09\/28\u6642\u70b9\u306e\u8868\u793a\uff09<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">SPF\u30fbDKIM\u30fbDMARC\u306f\u3059\u3079\u3066\u300cpass\u300d\u3067\u3001\u300c\u8a8d\u8a3c\u306f\u3059\u3079\u3066\u901a\u904e\u3057\u3066\u3044\u307e\u3059\u300d\u3068\u51fa\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ef6\u540d\u3068From\u306e\u540d\u524d\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u4e2d\u3067\u306f\u8a18\u53f7\u306e\u4e26\u3073\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u30c4\u30fc\u30eb\u304c\u65e5\u672c\u8a9e\u306b\u623b\u3057\u3066\u300c10\u6708\u306e\u5b9a\u4f11\u65e5\u300d\u300c\u30b5\u30f3\u30d7\u30eb\u5546\u5e97\u300d\u3068\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u9001\u7d4c\u8def\u306e\u8868\u3092\u898b\u308b\u3068\u3001\u4e2d\u7d99\u3057\u305f\u30b5\u30fc\u30d0\u30fc\u306f4\u53f0\u3067\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3\u884c\u76ee\u306e\u3001out.example.net \u304b\u3089 mx1.example.org \u3078\u6e21\u3063\u305f\u3068\u3053\u308d\u3060\u3051\u3001\u300c\u524d\u304b\u3089\u306e\u7d4c\u904e\u300d\u304c250\u79d2\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Received\u306e\u6642\u523b\u5dee\u306f\u9045\u5ef6\u7b87\u6240\u3092\u63a2\u3059\u624b\u639b\u304b\u308a\u3067\u3059\u3002\u305f\u3060\u3057\u30b5\u30fc\u30d0\u30fc\u306e\u6642\u8a08\u305a\u308c\u3084\u4fe1\u983c\u3067\u304d\u306a\u3044\u884c\u304c\u3042\u308a\u3001\u5dee\u3060\u3051\u3067\u539f\u56e0\u3092\u65ad\u5b9a\u305b\u305a\u914d\u9001\u30ed\u30b0\u3068\u7167\u5408\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">From\u3068Return-Path\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u9055\u3046\u3068\u3044\u3046\u6ce8\u610f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d50\u679c\u306b\u306f\u300cFrom \u3068 Return-Path \u306e\u30c9\u30e1\u30a4\u30f3\u304c\u7570\u306a\u308a\u307e\u3059\u300d\u3068\u3044\u3046\u6ce8\u610f\u3082\u51fa\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u898b\u305f\u76ee\u306e\u9001\u308a\u4e3b\u306f example.com \u3067\u3059\u304c\u3001\u5b9f\u969b\u306b\u9001\u3063\u305f\u306e\u306f\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306e bounce.example.net \u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SPF\u304c\u78ba\u304b\u3081\u308b\u306e\u306f\u3001Return-Path\u306e\u307b\u3046\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DMARC\u306f\u3001SPF\u304bDKIM\u306e\u3069\u3061\u3089\u304b\u304c\u300cpass\u3067\u3001\u3057\u304b\u3082From\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u300d\u3053\u3068\u3092\u6c42\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001DKIM\u306e\u7f72\u540d\u304c example.com\uff08header.d=example.com\uff09\u3067\u4ed8\u3044\u3066\u3044\u308b\u306e\u3067\u3001DMARC\u3082\u901a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3092\u4f7f\u3046\u3068\u304d\u306bDKIM\u306e\u8a2d\u5b9a\u304c\u6b20\u304b\u305b\u306a\u3044\u306e\u306f\u3001\u3053\u306e\u305f\u3081\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DKIM\u304c\u306a\u304f\u3066\u3082\u3001SPF\u304cpass\u3057\u3001\u305d\u306e\u8a8d\u8a3c\u30c9\u30e1\u30a4\u30f3\u304cFrom\u30c9\u30e1\u30a4\u30f3\u3068\u6574\u5408\u3059\u308c\u3070DMARC\u306f\u5408\u683c\u3057\u307e\u3059\u3002SPF\u304cpass\u3057\u305f\u3060\u3051\u3067\u306f\u3001\u6574\u5408\u3057\u3066\u3044\u308b\u304b\u306f\u5206\u304b\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u308b\u4f8b\uff5c\u8ee2\u9001\u3055\u308c\u305f\u30e1\u30fc\u30eb<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u30461\u3064\u3001<strong>\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u4f8b<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">example.com \u304b\u3089\u9001\u3089\u308c\u305f\u30e1\u30fc\u30eb\u304c\u3001\u9014\u4e2d\u306e fwd.example.net \u3067\u8ee2\u9001\u3055\u308c\u3066\u304b\u3089\u5c4a\u3044\u305f\u3001\u3068\u3044\u3046\u60f3\u5b9a\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>Received: from fwd.example.net\n  (fwd.example.net [198.51.100.40])\n  by mx1.example.org with ESMTPS\n  id C7d2; Mon, 28 Sep 2026\n  11:00:30 +0900\nReceived: from mail.example.com\n  (mail.example.com [192.0.2.25])\n  by fwd.example.net with ESMTP\n  id F1e8; Mon, 28 Sep 2026\n  11:00:02 +0900\nAuthentication-Results:\n  mx1.example.org;\n  spf=softfail\n  smtp.mailfrom=example.com;\n  dkim=none;\n  dmarc=fail header.from=example.com\nReturn-Path: &lt;info@example.com&gt;\nFrom: info@example.com\nTo: user@example.org\nSubject: test\nDate: Mon, 28 Sep 2026 11:00:00 +0900<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"924\" height=\"590\" src=\"https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-fail.png\" alt=\"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u89e3\u6790\u306b\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u8ee2\u9001\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u8cbc\u3063\u305f\u7d50\u679c\uff08DMARC\u5931\u6557\uff09\" class=\"wp-image-29306\" srcset=\"https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-fail.png 924w, https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-fail-382x244.png 382w, https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-fail-812x518.png 812w, https:\/\/motoki-design.co.jp\/wordpress\/wp-content\/uploads\/mail-header-example-fail-768x490.png 768w\" sizes=\"(max-width: 924px) 100vw, 924px\" \/><figcaption class=\"wp-element-caption\">\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u4f8bB\u306e\u89e3\u6790\u7d50\u679c\u3002DMARC\u304c\u5931\u6557\uff082026\/09\/28\u6642\u70b9\u306e\u8868\u793a\uff09<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">SPF\u306f\u300csoftfail\u300d\u3001DKIM\u306f\u300cnone\u300d\u3001DMARC\u306f\u300cfail\u300d\u3067\u3001\u300cDMARC\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u307e\u3059\u300d\u3068\u51fa\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ee2\u9001\u3067\u306f\u63a5\u7d9a\u5143\u304c\u8ee2\u9001\u30b5\u30fc\u30d0\u30fc\u306b\u306a\u308b\u305f\u3081\u3001\u5143\u306e\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7\u9001\u4fe1\u8005\u3092\u4f7f\u3063\u305fSPF\u304c\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u8ee2\u9001\u65b9\u5f0f\u306b\u3088\u3063\u3066\u7d50\u679c\u306f\u7570\u306a\u308a\u3001\u5fc5\u305a\u5931\u6557\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ee2\u9001\u5f8c\u3082DKIM\u7f72\u540d\u306e\u691c\u8a3c\u306b\u6210\u529f\u3057\u3001\u7f72\u540d\u30c9\u30e1\u30a4\u30f3\u304cFrom\u3068\u6574\u5408\u3059\u308c\u3070DMARC\u306f\u5408\u683c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u4f8b\u306fSPF\u304csoftfail\u3067DKIM\u3082none\u306e\u305f\u3081\u3001\u5408\u683c\u6761\u4ef6\u3092\u6e80\u305f\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53d7\u3051\u53d6\u308b\u5074\u304cDMARC\u306e\u8a2d\u5b9a\u306b\u5f93\u3046\u3068\u3001\u3053\u306e\u30e1\u30fc\u30eb\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u3063\u305f\u308a\u3001\u53d7\u3051\u53d6\u308a\u3092\u65ad\u3089\u308c\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u5074\u3067\u306fFrom\u3068\u6574\u5408\u3059\u308bDKIM\u7f72\u540d\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u8ee2\u9001\u9014\u4e2d\u306e\u672c\u6587\u3084\u7f72\u540d\u5bfe\u8c61\u30d8\u30c3\u30c0\u30fc\u306e\u5909\u66f4\u306b\u3088\u3063\u3066\u691c\u8a3c\u306b\u5931\u6557\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u3001\u8ee2\u9001\u5f8c\u306e\u5408\u683c\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u624b\u3067\u8aad\u3080\u3068\u304d\u306e\u30b3\u30c4<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Received\u306f\u4e0b\u304b\u3089\u4e0a\u3078\u3001\u53e4\u3044\u9806\u306b\u7a4d\u307f\u91cd\u306a\u3063\u3066\u3044\u308b<\/li>\n\n\n<li>Authentication-Results\u306f\u4f4d\u7f6e\u3060\u3051\u3067\u4fe1\u7528\u305b\u305a\u3001\u81ea\u5206\u306e\u53d7\u4fe1\u30b5\u30fc\u30d3\u30b9\u304c\u4fe1\u983c\u3059\u308b\u8a8d\u8a3c\u30b5\u30fc\u30d0\u30fc\u306e\u7d50\u679c\u3092\u78ba\u8a8d\u3059\u308b\u3002\u5916\u90e8\u304b\u3089\u4ed8\u3051\u3089\u308c\u305f\u540c\u540d\u30d8\u30c3\u30c0\u30fc\u306f\u507d\u88c5\u3067\u304d\u308b<\/li>\n\n\n<li>\u6642\u523b\u306e\u672b\u5c3e\u306e +0900 \u306f\u65e5\u672c\u6642\u9593\u3001+0000 \u306f\u4e16\u754c\u6a19\u6e96\u6642\u3092\u8868\u3059<\/li>\n\n\n<li>From\u306e\u540d\u524d\u3084\u4ef6\u540d\u304c\u300c=?UTF-8?B?\u300d\u3067\u59cb\u307e\u308b\u306e\u306f\u3001\u65e5\u672c\u8a9e\u3092\u8a18\u53f7\u306b\u7f6e\u304d\u63db\u3048\u3066\u9001\u3063\u3066\u3044\u308b\u305f\u3081<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b5\u30fc\u30d0\u30fc\u3054\u3068\u306b\u6642\u8a08\u304c\u5c11\u3057\u305a\u308c\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308b\u306e\u3067\u3001\u6570\u79d2\u306e\u5dee\u306f\u6c17\u306b\u3057\u306a\u304f\u3066\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u898b\u308b\u3079\u304d\u306a\u306e\u306f\u3001\u5206\u5358\u4f4d\u4ee5\u4e0a\u306e\u5927\u304d\u306a\u5dee\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u9001\u308b\u5074\u306e\u8a2d\u5b9a\u3068\u898b\u6bd4\u3079\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d8\u30c3\u30c0\u30fc\u3067\u5206\u304b\u308b\u306e\u306f\u3001\u5b9f\u969b\u306b\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\u3067\u4f55\u304c\u8d77\u304d\u305f\u304b\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9001\u308b\u5074\u306eDNS\u306e\u8a2d\u5b9a\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u306f\u3001<a href=\"https:\/\/motoki-design.co.jp\/tools\/mail-auth-check\/\">\u30e1\u30fc\u30eb\u8a8d\u8a3c\uff08SPF\u30fbDKIM\u30fbDMARC\uff09\u8a3a\u65ad<\/a>\u3067\u78ba\u304b\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u6790\u7d50\u679c\u306e\u3044\u3061\u3070\u3093\u4e0b\u306b\u3042\u308b\u300c\u9001\u4fe1\u5074\u306eDNS\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b\u300d\u304b\u3089\u3001\u305d\u306e\u307e\u307e\u79fb\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SPF\u30fbDKIM\u30fbDMARC\u306e\u78ba\u304b\u3081\u65b9\u3068\u76f4\u3057\u65b9\u306f\u3001\u300c<a href=\"https:\/\/motoki-design.co.jp\/wordpress\/spf-dkim-dmarc-check\/\">SPF\u30fbDKIM\u30fbDMARC\u306e\u78ba\u8a8d\u65b9\u6cd5<\/a>\u300d\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d8\u30c3\u30c0\u30fc\u306e\u300cDKIM-Signature\u300d\u306e\u884c\u306b\u3042\u308b\u300cs=\u300d\u306e\u5024\uff08\u3053\u306e\u4f8b\u3067\u306f s1\uff09\u304c\u3001DNS\u3067DKIM\u3092\u63a2\u3059\u3068\u304d\u306e\u30bb\u30ec\u30af\u30bf\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30c4\u30fc\u30eb\u306e\u9650\u754c<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5224\u5b9a\u306f\u3001\u53d7\u3051\u53d6\u3063\u305f\u5074\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u66f8\u3044\u305f\u7d50\u679c\u3092\u8aad\u3080\u3060\u3051\u3067\u3001\u30c4\u30fc\u30eb\u304c\u6539\u3081\u3066\u691c\u67fb\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u3044<\/li>\n\n\n<li>Authentication-Results\u304c\u7121\u3044\u30d8\u30c3\u30c0\u30fc\u3067\u306f\u3001\u5224\u5b9a\u306f\u300c\u4e0d\u660e\u300d\u306b\u306a\u308b<\/li>\n\n\n<li>\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u3063\u305f\u7406\u7531\u304c\u672c\u6587\u306e\u5185\u5bb9\u3084\u9001\u308a\u4e3b\u306e\u8a55\u5224\u306b\u3042\u308b\u5834\u5408\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u304b\u3089\u306f\u5206\u304b\u3089\u306a\u3044<\/li>\n\n\n<li>\u6642\u523b\u306f\u30d8\u30c3\u30c0\u30fc\u306b\u66f8\u304b\u308c\u305f\u3082\u306e\u306a\u306e\u3067\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u6642\u8a08\u304c\u305a\u308c\u3066\u3044\u308b\u3068\u7d4c\u904e\u6642\u9593\u3082\u305a\u308c\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a8d\u8a3c\u304c\u3059\u3079\u3066\u901a\u3063\u3066\u3044\u308b\u306e\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u308b\u5834\u5408\u306f\u3001\u30c4\u30fc\u30eb\u3082\u300c\u539f\u56e0\u306f\u8a8d\u8a3c\u4ee5\u5916\u306b\u3042\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u300d\u3068\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u4ed5\u4e8b\u306e\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u8cbc\u3063\u3066\u3082\u5927\u4e08\u592b\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30c4\u30fc\u30eb\u306f\u3001\u8cbc\u3063\u305f\u5185\u5bb9\u3092\u30b5\u30fc\u30d0\u30fc\u306b\u9001\u3089\u305a\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u306e\u4e2d\u3060\u3051\u3067\u89e3\u6790\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u4fe1\u304c\u8d77\u304d\u306a\u3044\u306e\u3067\u3001\u30d8\u30c3\u30c0\u30fc\u306b\u542b\u307e\u308c\u308b\u30a2\u30c9\u30ec\u30b9\u304c\u5916\u306b\u51fa\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Received\u306e\u884c\u304c\u591a\u3044\u306e\u306f\u554f\u984c\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u305d\u306e\u3082\u306e\u306f\u554f\u984c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u793e\u5185\u306e\u30b5\u30fc\u30d0\u30fc\u3084\u30a6\u30a4\u30eb\u30b9\u691c\u67fb\u3092\u901a\u308b\u305f\u3073\u306b1\u884c\u305a\u3064\u5897\u3048\u308b\u306e\u3067\u300110\u884c\u3092\u8d85\u3048\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u898b\u308b\u3079\u304d\u306a\u306e\u306f\u3001\u884c\u3068\u884c\u306e\u9593\u306e\u6642\u9593\u306e\u5dee\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. SPF\u304cpass\u306a\u306e\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u308a\u307e\u3059<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SPF\u304cpass\u3067\u3082\u3001Return-Path\u306e\u30c9\u30e1\u30a4\u30f3\u304cFrom\u3068\u9055\u3048\u3070\u3001DMARC\u306f\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305aAuthentication-Results\u306e\u300cdmarc=\u300d\u306e\u5024\u3092\u78ba\u304b\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fe1\u983c\u3059\u308b\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u306e\u7d50\u679c\u304cdmarc=pass\u306a\u3089\u3001\u672c\u6587\u3001\u9001\u4fe1\u5143\u306e\u8a55\u5224\u3001\u53d7\u4fe1\u8005\u5074\u306e\u30eb\u30fc\u30eb\u306a\u3069\u3082\u8abf\u3079\u307e\u3059\u3002\u8a8d\u8a3c\u5408\u683c\u306f\u53d7\u4fe1\u7bb1\u3078\u306e\u914d\u9054\u3092\u4fdd\u8a3c\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d8\u30c3\u30c0\u30fc\u3067\u6700\u521d\u306b\u898b\u308b\u306e\u306f\u3001Authentication-Results\u30fbReceived\u30fbFrom\u3068Return-Path\u306e3\u304b\u6240<\/li>\n\n\n<li>Received\u306f\u4e0b\u304b\u3089\u4e0a\u3078\u8aad\u307f\u3001\u6642\u523b\u306e\u5dee\u304c\u5927\u304d\u3044\u884c\u3067\u914d\u9001\u304c\u9045\u308c\u3066\u3044\u308b<\/li>\n\n\n<li><strong>\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3067\u306fSPF\u307e\u305f\u306fDKIM\u306e\u5408\u683c\u306b\u52a0\u3048\u3001From\u3068\u306e\u30c9\u30e1\u30a4\u30f3\u6574\u5408\u3092\u78ba\u8a8d\u3059\u308b<\/strong><\/li>\n\n\n<li>\u8ee2\u9001\u3067SPF\u304c\u5931\u6557\u3057\u3066\u3082\u3001From\u3068\u6574\u5408\u3059\u308bDKIM\u304c\u6709\u52b9\u306a\u3089DMARC\u306f\u5408\u683c\u3067\u304d\u308b<\/li>\n\n\n<li><a 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noreferrer\">\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u89e3\u6790\uff5cSPF\u30fbDKIM\u7d50\u679c\u3092\u7121\u6599\u78ba\u8a8d<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u8cbc\u308a\u4ed8\u3051\u308b\u3060\u3051\u3067\u3001SPF\u30fbDKIM\u30fbDMARC\u306e\u8a8d\u8a3c\u7d50\u679c\u3001\u7d4c\u7531\u30b5\u30fc\u30d0\u30fc\u3001\u5404\u4e2d\u7d99\u306e\u9045\u5ef6\u3092\u8aad\u307f\u89e3\u304d\u307e\u3059\u3002\u306a\u305c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5165\u3063\u305f\u304b\u306e\u539f\u56e0\u7a76\u660e\u306b\u3002\u30d6\u30e9\u30a6\u30b6&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n<p class=\"wp-block-paragraph\">WordPress\u306e\u304a\u554f\u3044\u5408\u308f\u305b\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u3044\u3068\u304d\u306f\u3001\u300c<a href=\"https:\/\/motoki-design.co.jp\/wordpress\/wordpress-gmail-smtp-spf-dkim-dmarc-mail-settings\/\">\u304a\u554f\u3044\u5408\u308f\u305b\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u3044\u30fb\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5c4a\u304f\u5834\u5408\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/a>\u300d\u3082\u3042\u308f\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307b\u304b\u306e\u9805\u76ee\u3082\u307e\u3068\u3081\u3066\u70b9\u691c\u3059\u308b\u306a\u3089\u3001\u300c<a href=\"https:\/\/motoki-design.co.jp\/wordpress\/wordpress-site-checkup\/\">WordPress\u30b5\u30a4\u30c8\u3092\u81ea\u5206\u3067\u70b9\u691c\u3059\u308b\u624b\u9806<\/a>\u300d\u3067\u9806\u756a\u3068\u4f7f\u3044\u5206\u3051\u3092\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c4\u30fc\u30eb\u306e\u4e00\u89a7\u306f<a href=\"https:\/\/motoki-design.co.jp\/tools\/tools-list\/\">WEB\u30c4\u30fc\u30eb\u7bb1<\/a>\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c4a\u3044\u305f\u306f\u305a\u306e\u30e1\u30fc\u30eb\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u3063\u3066\u3044\u305f\u308a\u3001\u9001\u3063\u3066\u304b\u3089\u5c4a\u304f\u307e\u3067\u306b\u4f55\u5206\u3082\u304b\u304b\u3063\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002 \u305d\u3046\u3057\u305f\u3068\u304d\u306e\u624b\u304c\u304b\u308a\u306f\u3001\u30e1\u30fc\u30eb\u306e\u300c\u30d8\u30c3\u30c0\u30fc\u300d\u306b\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002 \u30d8\u30c3\u30c0\u30fc\u306b\u306f\u3001\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u901a\u3063\u3066\u5c4a\u3044\u305f\u304b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":29308,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","book_review_data":"","footnotes":"","ssp_meta_title":"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306e\u898b\u65b9\u3068\u89e3\u6790\u306e\u3057\u304b\u305f","ssp_meta_description":"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306e\u898b\u65b9\u3092\u3001\u8aac\u660e\u7528\u306b\u4f5c\u3063\u305f\u4f8b\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002Gmail\u30fbOutlook\u3067\u306e\u53d6\u308a\u51fa\u3057\u65b9\u3001SPF\u30fbDKIM\u30fbDMARC\u306e\u5224\u5b9a\u306e\u8aad\u307f\u65b9\u3001Received\u304b\u3089\u914d\u9001\u306e\u9045\u308c\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u3001\u8cbc\u308b\u3060\u3051\u3067\u8aad\u307f\u89e3\u304f\u624b\u9806\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002"},"categories":[83],"tags":[],"area":[],"class_list":["post-29307","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tools"],"_links":{"self":[{"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/posts\/29307","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/comments?post=29307"}],"version-history":[{"count":5,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/posts\/29307\/revisions"}],"predecessor-version":[{"id":29968,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/posts\/29307\/revisions\/29968"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/media\/29308"}],"wp:attachment":[{"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/media?parent=29307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/categories?post=29307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/tags?post=29307"},{"taxonomy":"area","embeddable":true,"href":"https:\/\/motoki-design.co.jp\/wordpress\/wp-json\/wp\/v2\/area?post=29307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}