{"id":32570,"date":"2026-01-28T11:34:57","date_gmt":"2026-01-28T11:34:57","guid":{"rendered":"https:\/\/www.dotcom-monitor.com\/blog\/domain-health-check\/"},"modified":"2026-02-15T14:55:24","modified_gmt":"2026-02-15T14:55:24","slug":"domain-health-check","status":"publish","type":"post","link":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/domain-health-check\/","title":{"rendered":"\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\uff1a\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\u3001\u305d\u3057\u3066\u4f55\u304c\u5206\u304b\u308b\u306e\u304b"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignright wp-image-32466\" src=\"https:\/\/www.dotcom-monitor.com\/blog\/wp-content\/uploads\/sites\/3\/2026\/01\/domain-health-check.webp\" alt=\"\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\uff1a\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\u3001\u305d\u3057\u3066\u4f55\u304c\u5206\u304b\u308b\u306e\u304b\" width=\"450\" height=\"300\" srcset=\"https:\/\/www.dotcom-monitor.com\/blog\/wp-content\/uploads\/sites\/3\/2026\/01\/domain-health-check.webp 1280w, https:\/\/www.dotcom-monitor.com\/blog\/wp-content\/uploads\/sites\/3\/2026\/01\/domain-health-check-300x200.webp 300w, https:\/\/www.dotcom-monitor.com\/blog\/wp-content\/uploads\/sites\/3\/2026\/01\/domain-health-check-1024x682.webp 1024w, https:\/\/www.dotcom-monitor.com\/blog\/wp-content\/uploads\/sites\/3\/2026\/01\/domain-health-check-768x512.webp 768w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/>\u30c9\u30e1\u30a4\u30f3\u306f\u5358\u306a\u308b URL \u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4eba\u3084\u30de\u30b7\u30f3\u304c\u3042\u306a\u305f\u306e Web \u30b5\u30a4\u30c8\u3001\u30a2\u30d7\u30ea\u3001\u53d7\u4fe1\u7bb1\u306b\u5230\u9054\u3059\u308b\u305f\u3081\u306e\u5236\u5fa1\u30d7\u30ec\u30fc\u30f3\u3067\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u30ec\u30a4\u30e4\u30fc\u3067\u4f55\u304b\u304c\u58ca\u308c\u308b\u3068\u3001\u305d\u306e\u75c7\u72b6\u306f\u300c\u30e9\u30f3\u30c0\u30e0\u300d\u306b\u898b\u3048\u307e\u3059\uff08\u30b5\u30a4\u30c8\u306e\u65ad\u7d9a\u7684\u306a\u505c\u6b62\u3001<a href=\"https:\/\/www.dotcom-monitor.com\/ja\/%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%aa%e3%83%b3%e3%82%b0%e8%a3%bd%e5%93%81\/%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e7%9b%a3%e8%a6%96-%e3%83%89%e3%83%83%e3%83%88%e3%82%b3%e3%83%a0%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%bc\/\">\u30e1\u30fc\u30eb\u306e\u30d0\u30a6\u30f3\u30b9<\/a>\u3001\u30ed\u30b0\u30a4\u30f3\u5931\u6557\u306a\u3069\uff09\u3002\u3057\u304b\u3057\u6839\u672c\u539f\u56e0\u306f\u591a\u304f\u306e\u5834\u5408\u4e88\u6e2c\u53ef\u80fd\u3067\u3001\u8a2d\u5b9a\u30df\u30b9\u3001\u5f31\u3044\u8a8d\u8a3c\u3001\u307e\u305f\u306f <a href=\"https:\/\/www.dotcom-monitor.com\/ja\/%e3%83%89%e3%83%83%e3%83%88%e3%82%b3%e3%83%a0%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%bc%e3%81%a7%e5%ad%a6%e3%81%b6\/%e7%94%a8%e8%aa%9e%e9%9b%86\/dns%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e3%81%a8%e3%81%af%e4%bd%95%e3%81%8b%ef%bc%9f\/\">DNS \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/a>\u306e\u4f4e\u4e0b\u3067\u3059\u3002<\/p>\n<p><strong>\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af<\/strong>\u306f\u3001\u9867\u5ba2\u304c\u6c17\u4ed8\u304f\u524d\u306b\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u6700\u901f\u306e\u65b9\u6cd5\u3067\u3059\u3002\u5230\u9054\u6027\u3001\u914d\u4fe1\u6027\u3001\u4fe1\u983c\u6027\u3092\u652f\u3048\u308b DNS \u3068\u30e1\u30fc\u30eb\u306e\u57fa\u76e4\u3092\u691c\u8a3c\u3057\u3001\u4fee\u6b63\u304c\u5fc5\u8981\u306a\u70b9\u3092\u660e\u78ba\u306b\u3059\u308b\u3053\u3068\u3067\u3001<a href=\"https:\/\/www.dotcom-monitor.com\/ja\/%e3%82%bd%e3%83%aa%e3%83%a5%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3\/%e3%82%a2%e3%83%83%e3%83%97%e3%82%bf%e3%82%a4%e3%83%a0\/\">\u969c\u5bb3\u3092\u9632\u6b62<\/a>\u3057\u3001\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u3001\u30d6\u30e9\u30f3\u30c9\u3092\u4fdd\u8b77\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2 id='\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3068\u306f'  id=\"boomdevs_1\">\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3068\u306f\uff1f<\/h2>\n<p><strong>\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af<\/strong>\u306f\u3001\u4e3b\u306b DNS \u3068\u30e1\u30fc\u30eb\u95a2\u9023\u30ec\u30b3\u30fc\u30c9\u306b\u7126\u70b9\u3092\u5f53\u3066\u305f\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u6280\u8853\u69cb\u6210\u306b\u5bfe\u3059\u308b\u4f53\u7cfb\u7684\u306a\u76e3\u67fb\u3067\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u304c\u6b21\u306e\u72b6\u614b\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u89e3\u6c7a\u53ef\u80fd<\/strong>\uff08\u30e6\u30fc\u30b6\u30fc\u3084\u30b5\u30fc\u30d3\u30b9\u304c\u78ba\u5b9f\u306b\u898b\u3064\u3051\u3089\u308c\u308b\uff09<\/li>\n<li><strong>\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b<\/strong>\uff08\u30ec\u30b3\u30fc\u30c9\u304c\u6b63\u3057\u3044\u5834\u6240\u3092\u6307\u3057\u3066\u3044\u308b\uff09<\/li>\n<li><strong>\u5b89\u5168<\/strong>\uff08\u8a8d\u8a3c\u3055\u308c\u3001\u306a\u308a\u3059\u307e\u3057\u3084\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u306b\u8010\u6027\u304c\u3042\u308b\uff09<\/li>\n<li><strong>\u9ad8\u6027\u80fd<\/strong>\uff08DNS \u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u9ad8\u901f\u304b\u3064\u4e00\u8cab\u3057\u3066\u3044\u308b\uff09<\/li>\n<li><strong>\u8a55\u5224\u304c\u826f\u597d<\/strong>\uff08\u30e1\u30fc\u30eb\u3068\u30c9\u30e1\u30a4\u30f3\u306e\u8a55\u4fa1\u30b7\u30b0\u30ca\u30eb\u304c\u5065\u5168\uff09<\/li>\n<\/ul>\n<p>\u5b9f\u969b\u306b\u306f\u3001<strong>DNS \u30ec\u30b3\u30fc\u30c9\uff08A\/AAAA\u3001CNAME\u3001MX\u3001TXT\u3001PTR\uff09<\/strong>\u3001<strong>\u30e1\u30fc\u30eb\u8a8d\u8a3c\uff08SPF\u3001DKIM\u3001DMARC\u3001BIMI\uff09<\/strong>\u3001\u304a\u3088\u3073 <strong>\u914d\u4fe1\u6027\u8981\u56e0\uff08\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\/\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u3001SMTP \u5230\u9054\u6027\uff09<\/strong>\u306a\u3069\u3092\u691c\u67fb\u3057\u307e\u3059\u3002\u591a\u304f\u306e\u5834\u5408\u6570\u5206\u3067\u5b8c\u4e86\u3057\u3001\u554f\u984c\u70b9\u3068\u6539\u5584\u6a5f\u4f1a\u3092\u512a\u5148\u5ea6\u4ed8\u304d\u3067\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n<h2 id='\u306a\u305c\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u304c\u91cd\u8981\u306a\u306e\u304b'  id=\"boomdevs_2\">\u306a\u305c\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u304c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h2>\n<p>\u3042\u308b\u5c0f\u58f2\u696d\u8005\u306f\u3001Web \u30b5\u30fc\u30d0\u30fc\u3084 CDN \u306b\u554f\u984c\u304c\u898b\u5f53\u305f\u3089\u306a\u3044\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u30e8\u30fc\u30ed\u30c3\u30d1\u306e\u8a2a\u554f\u8005\u306e\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u7d04 5% \u4f4e\u4e0b\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u4ed8\u304d\u307e\u3057\u305f\u3002\u5b9a\u671f\u7684\u306a\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306b\u3088\u308a\u3001\u771f\u306e\u539f\u56e0\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002\u8907\u6570\u306e\u6b27\u5dde ISP \u304b\u3089\u306e DNS \u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u9045\u304f\u3001\u5730\u57df\u30ab\u30d0\u30ec\u30c3\u30b8\u304c\u5f31\u304f\u5fdc\u7b54\u6642\u9593\u304c\u4e0d\u5b89\u5b9a\u306a\u6a29\u5a01 DNS \u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u539f\u56e0\u3067\u3057\u305f\u3002DNS \u3092\u6b27\u5dde\u3067\u306e\u30d7\u30ec\u30bc\u30f3\u30b9\u304c\u5f37\u3044\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306b\u79fb\u884c\u3057\u3001\u4e3b\u8981\u30ec\u30b3\u30fc\u30c9\u306e TTL \u3092\u8abf\u6574\u3057\u305f\u7d50\u679c\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u306f\u5b89\u5b9a\u3057\u3001\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u4f4e\u4e0b\u306f\u89e3\u6d88\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h3 id='dns-\u306e\u554f\u984c\u306f\u76f4\u63a5\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u30ea\u30b9\u30af'  id=\"boomdevs_3\">DNS \u306e\u554f\u984c\u306f\u76f4\u63a5\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u30ea\u30b9\u30af<\/h3>\n<p>DNS \u306f\u9ad8\u3044\u30ec\u30d0\u30ec\u30c3\u30b8\u3092\u6301\u3064\u4f9d\u5b58\u95a2\u4fc2\u3067\u3059\u3002DNS \u304c\u5931\u6557\u3059\u308c\u3070\u3001\u4e0b\u6d41\u306e\u3059\u3079\u3066\u304c\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059\u3002\u307e\u305f DNS \u306f\u983b\u7e41\u306b\u653b\u6483\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3059\u3002Splunk \u306e\u63a8\u8a08\u306b\u3088\u308c\u3070\u3001<strong>\u6bce\u5e74 90% \u306e\u7d44\u7e54\u304c DNS \u653b\u6483\u3092\u53d7\u3051\u3066\u3044\u308b<\/strong>\u3068\u3055\u308c\u30011 \u4ef6\u3042\u305f\u308a\u306e\u30b3\u30b9\u30c8\u3082\u5927\u304d\u3044\u3067\u3059\u3002<\/p>\n<p>\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306f\u3001\u653b\u6483\u8005\u304c\u60aa\u7528\u3059\u308b\u5f31\u70b9\uff08\u8a2d\u5b9a\u30df\u30b9\u3001\u53e4\u3044\u30ec\u30b3\u30fc\u30c9\u3001\u4e0d\u5b89\u5168\u306a\u30d1\u30bf\u30fc\u30f3\uff09\u3092\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5316\u3059\u308b\u524d\u306b\u7279\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3 id='\u30e1\u30fc\u30eb\u5230\u9054\u7387\u306f\u8106\u5f31\u3067-\u8a55\u5224\u306f\u7c21\u5358\u306b\u640d\u306a\u308f\u308c\u308b'  id=\"boomdevs_4\">\u30e1\u30fc\u30eb\u5230\u9054\u7387\u306f\u8106\u5f31\u3067\u3001\u8a55\u5224\u306f\u7c21\u5358\u306b\u640d\u306a\u308f\u308c\u308b<\/h3>\n<p>\u30e1\u30fc\u30eb\u3092\u58f2\u4e0a\u3001\u9867\u5ba2\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u901a\u77e5\u306b\u5229\u7528\u3059\u308b\u30d3\u30b8\u30cd\u30b9\u306b\u3068\u3063\u3066\u3001\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u306f\u914d\u4fe1\u6027\u306e\u57fa\u76e4\u3067\u3059\u3002<\/p>\n<p>\u8a31\u53ef\u30d9\u30fc\u30b9\u306e\u30e1\u30fc\u30eb\u3067\u3042\u3063\u3066\u3082\u3001\u5fc5\u305a\u3057\u3082\u53d7\u4fe1\u7bb1\u306b\u5c4a\u304f\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002Validity \u306e\u914d\u4fe1\u6027\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306b\u3088\u308b\u3068\u3001<strong>\u300c\u6b63\u5f53\u306a\u300d\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb\u306e 6 \u901a\u306b 1 \u901a\u306f\u53d7\u4fe1\u7bb1\u306b\u914d\u4fe1\u3055\u308c\u3066\u3044\u307e\u305b\u3093<\/strong>\u3002<br \/>\n\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306f\u3001\u305d\u306e\u6280\u8853\u7684\u7406\u7531\uff08SPF \u306e\u6b20\u843d\u3084\u8aa4\u8a2d\u5b9a\u3001DKIM \u5931\u6557\u3001DMARC \u306e\u4e0d\u6574\u5408\u3001\u9001\u4fe1\u57fa\u76e4\u306e\u554f\u984c\uff09\u3092\u660e\u3089\u304b\u306b\u3057\u307e\u3059\u3002<\/p>\n<h3 id='\u63a5\u7d9a\u6027-\u306f\u4f9d\u7136\u3068\u3057\u3066\u4e3b\u8981\u306a\u969c\u5bb3\u8981\u56e0'  id=\"boomdevs_5\">\u300c\u63a5\u7d9a\u6027\u300d\u306f\u4f9d\u7136\u3068\u3057\u3066\u4e3b\u8981\u306a\u969c\u5bb3\u8981\u56e0<\/h3>\n<p>\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u300d\u306e\u305b\u3044\u306b\u3055\u308c\u308b\u591a\u304f\u306e\u969c\u5bb3\u306f\u3001\u5b9f\u969b\u306b\u306f\u540d\u524d\u89e3\u6c7a\u3084 DNS \u4f9d\u5b58\u95a2\u4fc2\u306b\u8d77\u56e0\u3057\u307e\u3059\u3002Network World \u304c\u5831\u3058\u305f Uptime Institute \u306e\u8abf\u67fb\u3067\u306f\u3001<strong>31% \u306e\u56de\u7b54\u8005<\/strong>\u304c <strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\/\u63a5\u7d9a\u6027<\/strong>\u3092 IT \u30b5\u30fc\u30d3\u30b9\u969c\u5bb3\u306e\u6700\u3082\u4e00\u822c\u7684\u306a\u539f\u56e0\u3068\u3057\u3066\u6319\u3052\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u53ef\u7528\u6027\u304c\u4e0d\u5b89\u5b9a\u306b\u611f\u3058\u3089\u308c\u308b\u3068\u304d\u3001DNS \u306f\u6700\u521d\u306b\u78ba\u8a8d\u3059\u3079\u304d\u5834\u6240\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n<h2 id='\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3067\u5206\u304b\u308b\u3053\u3068'  id=\"boomdevs_6\">\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3067\u5206\u304b\u308b\u3053\u3068<\/h2>\n<p>\u51fa\u529b\u306f\u30015 \u3064\u306e\u9818\u57df\u306b\u307e\u305f\u304c\u308b\u8a3a\u65ad\u30ec\u30dd\u30fc\u30c8\u3068\u8003\u3048\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n<h3 id='dns-\u89e3\u6c7a\u3068\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u6b63\u78ba\u6027'  id=\"boomdevs_7\">DNS \u89e3\u6c7a\u3068\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u6b63\u78ba\u6027<\/h3>\n<p>\u3042\u308b SaaS \u30c1\u30fc\u30e0\u306f\u3001\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u306e\u307f\u5f71\u97ff\u3059\u308b\u300c\u65ad\u7d9a\u7684\u306a\u969c\u5bb3\u300d\u3092\u4f55\u6642\u9593\u3082\u8ffd\u8de1\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u30a2\u30d7\u30ea\u306f\u7a3c\u50cd\u3057\u3066\u304a\u308a\u3001\u30ed\u30b0\u3082\u30af\u30ea\u30fc\u30f3\u3001\u30a4\u30f3\u30d5\u30e9\u6307\u6a19\u3082\u6b63\u5e38\u3067\u3057\u305f\u3002\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306f\u6570\u5206\u3067\u554f\u984c\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002\u53e4\u3044 A \u30ec\u30b3\u30fc\u30c9\u304c\u6b8b\u3063\u305f\u307e\u307e\u65b0\u3057\u3044 CNAME \u304c\u8ffd\u52a0\u3055\u308c\u305f\u7af6\u5408\u3059\u308b DNS \u8a2d\u5b9a\u306b\u3088\u308a\u3001\u30ea\u30be\u30eb\u30d0\u3054\u3068\u306b\u7570\u306a\u308b\u7d4c\u8def\u3078\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u3066\u3044\u305f\u306e\u3067\u3059\u3002\u53e4\u3044\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3057 TTL \u3092\u6a19\u6e96\u5316\u3059\u308b\u3068\u3001\u300c\u30e9\u30f3\u30c0\u30e0\u300d\u306a\u969c\u5bb3\u306f\u89e3\u6d88\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h4 id='\u4f55\u304c\u5206\u304b\u308b\u306e\u304b'  id=\"boomdevs_8\">\u4f55\u304c\u5206\u304b\u308b\u306e\u304b\uff1f<\/h4>\n<ul>\n<li>\u8aa4\u3063\u305f\u3001\u307e\u305f\u306f\u6b20\u843d\u3057\u3066\u3044\u308b A\/AAAA\/CNAME \u30ec\u30b3\u30fc\u30c9<\/li>\n<li>\u58ca\u308c\u305f\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3<\/li>\n<li>\u8aa4\u3063\u3066\u5411\u3051\u3089\u308c\u305f\u30b5\u30fc\u30d3\u30b9\uff08Web\/\u30a2\u30d7\u30ea\/CDN\uff09<\/li>\n<li>\u7af6\u5408\u3059\u308b\u30ec\u30b3\u30fc\u30c9\uff08\u4f8b\uff1a\u540c\u4e00\u540d\u3067\u306e CNAME + A\uff09<\/li>\n<li>\u9ad8\u3059\u304e\u308b TTL\uff08\u5fa9\u65e7\u304c\u9045\u3044\uff09\u307e\u305f\u306f\u4f4e\u3059\u304e\u308b TTL\uff08\u4e0d\u8981\u306a\u8ca0\u8377\uff09<\/li>\n<\/ul>\n<h4 id='\u306a\u305c\u91cd\u8981\u306a\u306e\u304b'  id=\"boomdevs_9\">\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h4>\n<p>\u30e6\u30fc\u30b6\u30fc\u304c\u30c9\u30e1\u30a4\u30f3\u3092\u8fc5\u901f\u304b\u3064\u4e00\u8cab\u3057\u3066\u89e3\u6c7a\u3067\u304d\u306a\u3044\u5834\u5408\u3001\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u304c\u306a\u304f\u3066\u3082\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u306e\u75c7\u72b6\u304c\u73fe\u308c\u307e\u3059\u3002<\/p>\n<h4 id='\u4f55\u3092\u3059\u3079\u304d\u304b'  id=\"boomdevs_10\">\u4f55\u3092\u3059\u3079\u304d\u304b\uff1f<\/h4>\n<ul>\n<li>\u3059\u3079\u3066\u306e\u91cd\u8981\u30db\u30b9\u30c8\u540d\uff08\u30eb\u30fc\u30c8\u3001www\u3001\u30a2\u30d7\u30ea\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3001API\u3001\u8a8d\u8a3c\uff09\u306e\u4e3b\u8981\u30ec\u30b3\u30fc\u30c9\u3092\u691c\u8a3c<\/li>\n<li>TTL \u3092\u6a19\u6e96\u5316\uff08\u5909\u66f4\u304c\u8d77\u3053\u308a\u3084\u3059\u3044\u30ec\u30b3\u30fc\u30c9\u306f\u77ed\u304f\u3001\u5b89\u5b9a\u3057\u305f\u3082\u306e\u306f\u9577\u304f\uff09<\/li>\n<li>\u53e4\u3044\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3057\u3001\u6df7\u4e71\u3068\u653b\u6483\u9762\u3092\u524a\u6e1b<\/li>\n<\/ul>\n<h3 id='\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u5b8c\u5168\u6027-spf-dkim-dmarc-bimi'  id=\"boomdevs_11\">\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u5b8c\u5168\u6027\uff08SPF\u3001DKIM\u3001DMARC\u3001BIMI\uff09<\/h3>\n<p>\u65b0\u3057\u3044\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u8ffd\u52a0\u3057\u305f\u5f8c\u3001\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u30e1\u30fc\u30eb\u304c\u30b9\u30d1\u30e0\u306b\u5165\u308a\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u306e\u4e00\u90e8\u304c\u30d0\u30a6\u30f3\u30b9\u3057\u59cb\u3081\u305f\u4f01\u696d\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306b\u3088\u308a\u539f\u56e0\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002\u8907\u6570\u306e SPF \u30ec\u30b3\u30fc\u30c9\u3068\u9577\u3044 include \u30c1\u30a7\u30fc\u30f3\u306b\u3088\u308a DNS \u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u5236\u9650\u3092\u8d85\u904e\u3057\u3001DKIM \u30bb\u30ec\u30af\u30bf\u30fc\u3082\u4e00\u8cab\u3057\u3066\u7f72\u540d\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002SPF \u3092\u5358\u4e00\u30ec\u30b3\u30fc\u30c9\u306b\u7d71\u5408\u3057\u3001DKIM \u7f72\u540d\u3092\u4fee\u6b63\u3057\u3001DMARC \u3092 p=none \u304b\u3089\u6bb5\u968e\u7684\u306a\u9069\u7528\u306b\u79fb\u884c\u3057\u305f\u3053\u3068\u3067\u3001\u53d7\u4fe1\u7bb1\u914d\u4fe1\u304c\u56de\u5fa9\u3057\u3001\u306a\u308a\u3059\u307e\u3057\u30ea\u30b9\u30af\u3082\u4f4e\u6e1b\u3057\u307e\u3057\u305f\u3002<\/p>\n<h4 id='\u4f55\u304c\u5206\u304b\u308b\u306e\u304b-1'  id=\"boomdevs_12\">\u4f55\u304c\u5206\u304b\u308b\u306e\u304b\uff1f<\/h4>\n<ul>\n<li>SPF \u306e\u6b20\u843d\u3001\u904e\u5ea6\u306b\u8a31\u53ef\u7684\u3001\u307e\u305f\u306f\u7834\u640d\uff08\u8907\u6570\u306e SPF TXT\u3001>10 \u56de\u306e DNS \u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30cf\u30fc\u30c9\u30d5\u30a7\u30a4\u30eb\uff09<\/li>\n<li>DKIM \u306e\u672a\u516c\u958b\u3001\u8aa4\u3063\u305f\u30bb\u30ec\u30af\u30bf\u30fc\u3001\u7f72\u540d\u5931\u6557<\/li>\n<li>DMARC \u306e\u6b20\u843d\u3001\u307e\u305f\u306f\u9577\u671f\u9593 p=none \u306e\u307e\u307e\uff08\u672a\u9069\u7528\uff09<\/li>\n<li>BIMI \u306e\u6b20\u843d\u307e\u305f\u306f\u7121\u52b9\uff08\u30d6\u30e9\u30f3\u30c9\u8868\u793a\u6a5f\u4f1a\u3068\u4fe1\u983c\u30b7\u30b0\u30ca\u30eb\uff09<\/li>\n<\/ul>\n<h4 id='\u306a\u305c\u91cd\u8981\u306a\u306e\u304b-1'  id=\"boomdevs_13\">\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h4>\n<p>\u8a8d\u8a3c\u306f\u3001\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u300c\u3042\u306a\u305f\u304c\u672c\u5f53\u306b\u3042\u306a\u305f\u304b\u300d\u3092\u5224\u65ad\u3059\u308b\u624b\u6bb5\u3067\u3059\u3002SPF\/DKIM\/DMARC \u304c\u8aa4\u3063\u3066\u3044\u308b\u3068\u3001\u6b21\u306e\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u53d7\u4fe1\u7bb1\u5230\u9054\u7387\u306e\u4f4e\u4e0b<\/li>\n<li>\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\/\u306a\u308a\u3059\u307e\u3057\u30ea\u30b9\u30af\u306e\u5897\u5927<\/li>\n<li>\u30d6\u30e9\u30f3\u30c9\u4fe1\u983c\u306e\u4f4e\u4e0b<\/li>\n<\/ul>\n<h4 id='\u4f55\u3092\u3059\u3079\u304d\u304b-1'  id=\"boomdevs_14\">\u4f55\u3092\u3059\u3079\u304d\u304b\uff1f<\/h4>\n<ul>\n<li>\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005\uff08CRM\u3001\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3001\u30b5\u30dd\u30fc\u30c8\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\uff09\u3092\u7d71\u5408-<\/li>\n<li>\u5404\u9001\u4fe1\u8005\u306b SPF + DKIM \u3092\u5b9f\u88c5<\/li>\n<li>DMARC \u3092\u6bb5\u968e\u7684\u306b\u5c55\u958b\uff1anone \u2192 quarantine \u2192 reject\uff08\u76e3\u8996\u4ed8\u304d\uff09<\/li>\n<li>DMARC \u306e\u9069\u7528\u304c\u5b89\u5b9a\u3057\u305f\u3089 BIMI \u3092\u8ffd\u52a0\uff08\u5bfe\u5fdc\u74b0\u5883\uff09<\/li>\n<\/ul>\n<h3 id='\u914d\u4fe1\u6027\u3068\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8-\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u9732\u51fa'  id=\"boomdevs_15\">\u914d\u4fe1\u6027\u3068\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\/\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u9732\u51fa<\/h3>\n<h4 id='\u4f55\u304c\u5206\u304b\u308b\u306e\u304b-2'  id=\"boomdevs_16\">\u4f55\u304c\u5206\u304b\u308b\u306e\u304b\uff1f<\/h4>\n<ul>\n<li>\u4e00\u822c\u7684\u306a\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u3078\u306e\u30c9\u30e1\u30a4\u30f3\/IP \u63b2\u8f09\u72b6\u6cc1<\/li>\n<li>\u30b5\u30a4\u30ec\u30f3\u30c8\u5931\u6557\u3084\u30d0\u30a6\u30f3\u30b9\u3092\u5f15\u304d\u8d77\u3053\u3059 SMTP \u5230\u9054\u6027\u306e\u554f\u984c<\/li>\n<li>\u300c\u8a55\u5224\u306e\u30c9\u30ea\u30d5\u30c8\u300d\uff08\u30b9\u30d1\u30e0\u914d\u4fe1\u306e\u5897\u52a0\u3001\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u4f4e\u4e0b\u3001\u30d0\u30a6\u30f3\u30b9\u5897\u52a0\uff09<\/li>\n<\/ul>\n<h4 id='\u306a\u305c\u91cd\u8981\u306a\u306e\u304b-2'  id=\"boomdevs_17\">\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h4>\n<p>\u4e00\u5ea6\u63b2\u8f09\u3055\u308c\u308b\u3068\u3001\u56de\u5fa9\u307e\u3067\u306b\u6570\u65e5\u304b\u3089\u6570\u9031\u9593\u304b\u304b\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u305d\u306e\u671f\u9593\u306b\u9001\u4fe1\u3057\u305f\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306f\u9577\u671f\u7684\u306b\u6210\u679c\u304c\u843d\u3061\u304c\u3061\u3067\u3059\u3002<\/p>\n<h4 id='\u4f55\u3092\u3059\u3079\u304d\u304b-2'  id=\"boomdevs_18\">\u4f55\u3092\u3059\u3079\u304d\u304b\uff1f<\/h4>\n<ul>\n<li><a href=\"https:\/\/www.dotcom-monitor.com\/blog\/ja\/best-dns-monitoring-tools\/\">\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u7d99\u7d9a\u7684\u306b\u76e3\u8996<\/a>\uff08\u554f\u984c\u767a\u751f\u6642\u3060\u3051\u78ba\u8a8d\u3057\u306a\u3044\uff09<\/li>\n<li>\u6839\u672c\u539f\u56e0\u3092\u4fee\u6b63\uff08\u30ea\u30b9\u30c8\u7ba1\u7406\u3001\u540c\u610f\u3001\u30d0\u30a6\u30f3\u30b9\u5236\u5fa1\u3001\u9001\u4fe1\u91cf\u30b9\u30d1\u30a4\u30af\uff09<\/li>\n<li>SMTP \u8a2d\u5b9a\u3092\u691c\u8a3c\u3057\u3001\u8a8d\u8a3c\u306e\u6574\u5408\u6027\u3092\u7dad\u6301<\/li>\n<\/ul>\n<p><em>\u73fe\u5b9f\u30c1\u30a7\u30c3\u30af\uff1a<\/em> \u5b9f\u969b\u306b\u306f <strong>\u6570\u767e<\/strong> \u306e\u30ea\u30b9\u30c8\u3068\u30dd\u30ea\u30b7\u30fc\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<strong>200 \u4ee5\u4e0a\u306e\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8<\/strong>\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u30c4\u30fc\u30eb\u3067\u3082\u90e8\u5206\u7684\u306a\u8996\u70b9\u306b\u904e\u304e\u307e\u305b\u3093\u304c\u3001\u4f55\u3082\u5206\u304b\u3089\u306a\u3044\u72b6\u614b\u3088\u308a\u306f\u306f\u308b\u304b\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<h3 id='\u53ef\u7528\u6027-\u30ec\u30b8\u30ea\u30a8\u30f3\u30b9-\u305d\u3057\u3066-\u5f71\u97ff\u534a\u5f84'  id=\"boomdevs_19\">\u53ef\u7528\u6027\u3001\u30ec\u30b8\u30ea\u30a8\u30f3\u30b9\u3001\u305d\u3057\u3066\u300c\u5f71\u97ff\u534a\u5f84\u300d<\/h3>\n<h4 id='\u4f55\u304c\u5206\u304b\u308b\u306e\u304b-3'  id=\"boomdevs_20\">\u4f55\u304c\u5206\u304b\u308b\u306e\u304b\uff1f<\/h4>\n<ul>\n<li>DNS \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u5358\u4e00\u969c\u5bb3\u70b9\uff08\u4f8b\uff1a\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc 1 \u53f0\u3001\u5358\u4e00\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3001\u5197\u9577\u6027\u4e0d\u8db3\uff09<\/li>\n<li>\u6a29\u5a01 DNS \u554f\u984c\u306b\u5bfe\u3059\u308b\u76e3\u8996\/\u30a2\u30e9\u30fc\u30c8\u306e\u6b20\u5982<\/li>\n<li>\u91cd\u8981\u30b5\u30fc\u30d3\u30b9\u306e\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u30d1\u30bf\u30fc\u30f3\u4e0d\u8db3<\/li>\n<\/ul>\n<h4 id='\u306a\u305c\u91cd\u8981\u306a\u306e\u304b-3'  id=\"boomdevs_21\">\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h4>\n<p>\u30ec\u30b8\u30ea\u30a8\u30f3\u30b9\u304c\u306a\u3051\u308c\u3070\u3001\u5c0f\u3055\u306a DNS \u30df\u30b9\u304c\u5168\u9762\u7684\u306a\u969c\u5bb3\u306b\u767a\u5c55\u3057\u307e\u3059\u3002<\/p>\n<h4 id='\u4f55\u3092\u3059\u3079\u304d\u304b-3'  id=\"boomdevs_22\">\u4f55\u3092\u3059\u3079\u304d\u304b\uff1f<\/h4>\n<ul>\n<li>\u30b0\u30ed\u30fc\u30d0\u30eb\u3067\u30ec\u30b8\u30ea\u30a8\u30f3\u30c8\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u9ad8\u3044\u7a3c\u50cd\u5b9f\u7e3e\u3092\u6301\u3064 DNS \u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3092\u4f7f\u7528<\/li>\n<li><a href=\"https:\/\/www.dotcom-monitor.com\/ja\/%e9%a1%94%e7%ab%8b%e3%81%a1\/%e7%89%b9%e5%be%b4%e3%82%a2%e3%83%a9%e3%83%bc%e3%83%88\/\">\u76e3\u8996\u3092\u5b9f\u88c5\uff08DNS \u30c1\u30a7\u30c3\u30af + \u30b5\u30fc\u30d3\u30b9\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\uff09<\/a><\/li>\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u91cd\u8981\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306e DNS \u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u6226\u7565\u3092\u691c\u8a0e<\/li>\n<\/ul>\n<h3 id='\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30b7\u30b0\u30ca\u30eb-\u30ec\u30a4\u30c6\u30f3\u30b7-\u4e0d\u6574\u5408-\u7570\u5e38'  id=\"boomdevs_23\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30b7\u30b0\u30ca\u30eb\uff08\u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u4e0d\u6574\u5408\u3001\u7570\u5e38\uff09<\/h3>\n<h4 id='\u4f55\u304c\u5206\u304b\u308b\u306e\u304b-4'  id=\"boomdevs_24\">\u4f55\u304c\u5206\u304b\u308b\u306e\u304b\uff1f<\/h4>\n<ul>\n<li>\u4e3b\u8981\u5730\u57df\u3067\u306e DNS \u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u9045\u5ef6<\/li>\n<li>\u5730\u57df\/ISP \u3068\u76f8\u95a2\u3059\u308b\u65ad\u7d9a\u7684\u306a\u89e3\u6c7a\u5931\u6557<\/li>\n<li>\u4e0d\u6b63\u5229\u7528\u3084\u8a2d\u5b9a\u30df\u30b9\u3092\u793a\u5506\u3059\u308b\u7570\u5e38\u306a\u30af\u30a8\u30ea\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/ul>\n<h4 id='\u306a\u305c\u91cd\u8981\u306a\u306e\u304b-4'  id=\"boomdevs_25\">\u306a\u305c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h4>\n<p>DNS \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u5b9f\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u9045\u5ef6\u304c\u5897\u3048\u308b\u305f\u3073\u306b\u3001\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u3001SEO \u306e\u30af\u30ed\u30fc\u30eb\u52b9\u7387\uff08\u9593\u63a5\u7684\uff09\u3001\u30a2\u30d7\u30ea\u306e\u4fe1\u983c\u6027\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002<\/p>\n<h4 id='\u4f55\u3092\u3059\u3079\u304d\u304b-4'  id=\"boomdevs_26\">\u4f55\u3092\u3059\u3079\u304d\u304b\uff1f<\/h4>\n<ul>\n<li>DNS \u5fdc\u7b54\u6642\u9593\u3092\u30d9\u30f3\u30c1\u30de\u30fc\u30af\uff08\u8907\u6570\u5730\u57df\uff09<\/li>\n<li>\u4e0d\u8981\u306a\u9593\u63a5\u53c2\u7167\uff08\u8ffd\u52a0\u306e CNAME \u30db\u30c3\u30d7\uff09\u3092\u524a\u9664<\/li>\n<li>DNS \u5206\u6790\u3067\u30b9\u30d1\u30a4\u30af\u3001\u7570\u5e38\u306a\u9001\u4fe1\u5143\u3001\u30ec\u30b3\u30fc\u30c9\u5225\u5229\u7528\u50be\u5411\u3092\u628a\u63e1<\/li>\n<\/ul>\n<h2 id='\u30c9\u30e1\u30a4\u30f3\u30b9\u30ad\u30e3\u30ca\u30fc\u3068\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306e\u9055\u3044'  id=\"boomdevs_27\">\u30c9\u30e1\u30a4\u30f3\u30b9\u30ad\u30e3\u30ca\u30fc\u3068\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306e\u9055\u3044<\/h2>\n<p><a href=\"https:\/\/www.dotcom-tools.com\/\" target=\"_blank\" rel=\"noopener\"><strong>\u30c9\u30e1\u30a4\u30f3\u30b9\u30ad\u30e3\u30ca\u30fc<\/strong><\/a>\u306f\u3001\u30ec\u30b3\u30fc\u30c9\u3084\u8a8d\u8a3c\u3001\u57fa\u672c\u8a2d\u5b9a\u3092\u81ea\u52d5\u30c1\u30a7\u30c3\u30af\u3059\u308b\u30c4\u30fc\u30eb\u3067\u3059\u3002<strong>\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af<\/strong>\u306f\u3001\u30b9\u30ad\u30e3\u30ca\u30fc\u7d50\u679c\u306b\u89e3\u91c8\u3068\u662f\u6b63\u8a08\u753b\u3092\u52a0\u3048\u305f\u3001\u3088\u308a\u5e83\u7bc4\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002<\/p>\n<p>\u512a\u308c\u305f\u30b9\u30ad\u30e3\u30ca\u30fc\u306f\u901a\u5e38\u3001\u6b21\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>SPF\u3001DKIM\u3001DMARC\u3001BIMI \u306e\u6709\u7121\u3068\u6709\u52b9\u6027<\/li>\n<li>DNS \u30ec\u30b3\u30fc\u30c9\u306e\u6b63\u78ba\u6027\u3068\u7af6\u5408<\/li>\n<li>MX \u691c\u8a3c\u306b\u3088\u308b\u30e1\u30fc\u30eb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0<\/li>\n<li>\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u9732\u51fa\u30b7\u30b0\u30ca\u30eb<\/li>\n<\/ul>\n<h2 id='\u5b9f\u8df5\u7684\u306a\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8'  id=\"boomdevs_28\">\u5b9f\u8df5\u7684\u306a\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n<p>\u4ee5\u4e0b\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4f7f\u3048\u3070\u3001\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u3001\u914d\u4fe1\u6027\u4f4e\u4e0b\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ae\u30e3\u30c3\u30d7\u3092\u5f15\u304d\u8d77\u3053\u3059 DNS \u3084\u30e1\u30fc\u30eb\u306e\u554f\u984c\u3092\u7d20\u65e9\u304f\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002\u30b3\u30d4\u30fc\uff06\u30da\u30fc\u30b9\u30c8\u3057\u3084\u3059\u304f\u3001\u65b0\u898f\u30c9\u30e1\u30a4\u30f3\u306e\u30aa\u30f3\u30dc\u30fc\u30c7\u30a3\u30f3\u30b0\u3001DNS \u5909\u66f4\u8a08\u753b\u3001\u30db\u30b9\u30c8\u79fb\u884c\u3001\u30e1\u30fc\u30eb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u5207\u308a\u66ff\u3048\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u306f\u3001\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\u3001A\/AAAA \u30ec\u30b3\u30fc\u30c9\u3001CNAME\u3001MX \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001\u30e1\u30fc\u30eb\u8a8d\u8a3c\uff08SPF\/DKIM\/DMARC\uff09\u3068\u3044\u3063\u305f\u8981\u70b9\u3092\u78ba\u8a8d\u3057\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3084\u53d7\u4fe1\u7bb1\u914d\u4fe1\u306b\u5f71\u97ff\u304c\u51fa\u308b\u524d\u306b\u4e00\u822c\u7684\u306a\u8a2d\u5b9a\u30df\u30b9\u3092\u767a\u898b\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u30ed\u30fc\u30f3\u30c1\u3001\u30ea\u30d6\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u3001\u30d9\u30f3\u30c0\u30fc\u5f15\u304d\u7d99\u304e\u5f8c\u306e\u30af\u30a4\u30c3\u30af\u76e3\u67fb\u306b\u3082\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<style id=\"epg-inline-css\">\n.epg-wrap{color: #FFF; text-align: center; width: calc(100%); background-color: #0055A5; padding: 20px 30px; clear: both; margin-bottom: 20px;}\n.epg-title{margin:0 0 8px;color: #FFF; font-size: 28px;}\n.epg-text{margin:0 0 14px;font-size: 22px;}\n.epg-form input.epg-name,.epg-form input.epg-email{width:100%;padding:10px 12px;border:0;border-radius:5px;box-sizing:border-box}\n.epg-btn{color: #FFF;background-color: #f37f21;display: inline-block;padding: 10px 20px;border-radius: 5px;-moz-border-radius: 5px;-webkit-border-radius: 5px;font-size: 22px;font-weight: normal !important; border:0}\n.epg-btn:hover {background-color: #f37f21; opacity: 0.85}\n.epg-download-link{display:inline-block;padding:0;text-decoration:underline !important; color: #FFF !important;font-size: 24px;}\n.epg-download-link:hover {text-decoration: none !important; color: #FFF !important;}\n.epg-msg{font-size:14px}\n.eph-form-buttons{argin-top: 20px;}\n.epg-unlocked .epg-text{display:none !important;}\n@media screen and (min-width: 600px) {\n.eph-form-name {display: inline;margin-right: 5px;}\n.eph-form-email {display: inline;margin-left: 5px;}\n.eph-form-buttons {margin-top: 20px;}\n}\n<\/style><script id=\"epg-inline-js\">\n(function(){\n  function validEmail(email){ return \/^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$\/.test(email); }\n\n  function setMsg(root, text, ok){\n    var msg = root.querySelector(\".epg-msg\");\n    if(!msg) return;\n    msg.textContent = text || \"\";\n    msg.style.color = ok ? \"green\" : \"crimson\";\n  }\n\n  function buildDownloadUrl(token){\n    var u = new URL(window.location.href);\n    u.searchParams.set(\"epg_dl\", token);\n    return u.toString();\n  }\n\n  \/\/ Event delegation: one handler for all forms\n  document.addEventListener(\"click\", function(e){\n    var btn = e.target.closest(\".epg-btn\");\n    if(!btn) return;\n\n    var root = btn.closest(\".epg-wrap\");\n    if(!root) return;\n\n    e.preventDefault();\n\n    var nameInput  = root.querySelector(\".epg-name\");\n    var emailInput = root.querySelector(\".epg-email\");\n\n    var name  = (nameInput && nameInput.value ? nameInput.value : \"\").trim();\n    var email = (emailInput && emailInput.value ? emailInput.value : \"\").trim();\n\n    if(!name){\n      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id=\"epg_bde0e288-ece6-4efe-946b-3169bdac91c3\"\n             data-ajax=\"https:\/\/www.dotcom-monitor.com\/blog\/wp-admin\/admin-ajax.php\"\n             data-nonce=\"f8117aeeff\"\n             data-file=\"https:\/\/www.dotcom-monitor.com\/blog\/wp-content\/uploads\/sites\/3\/2026\/01\/dcm_domain_health_check_checklist.pdf\"\n             data-linktext=\"\u30c9\u30e1\u30a4\u30f3\u5065\u5168\u6027\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\">\n\n                            <h3 class=\"epg-title\">\u30c9\u30e1\u30a4\u30f3\u5065\u5eb7\u8a3a\u65ad\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u5165\u624b\u3059\u308b<\/h3>\n            \n                            <p class=\"epg-text\">\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u7ba1\u7406\u3059\u308b\u3059\u3079\u3066\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u6d3b\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            \n            <div class=\"epg-form\">\n                <p class=\"eph-form-name\">\n                    <label>\n                        <span class=\"screen-reader-text\">\u3042\u306a\u305f\u306e\u540d\u524d<\/span>\n                        <input type=\"text\" class=\"epg-name\" placeholder=\"\u3042\u306a\u305f\u306e\u540d\u524d\" \/>\n                    <\/label>\n                <\/p>\n                <p class=\"eph-form-email\">\n                    <label>\n                        <span class=\"screen-reader-text\">\u3042\u306a\u305f\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9<\/span>\n                        <input type=\"email\" class=\"epg-email\" placeholder=\"\u3042\u306a\u305f\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\" \/>\n                    <\/label>\n                <\/p>\n                <p class=\"eph-form-buttons\">\n                    <button type=\"button\" class=\"epg-btn\">\u30c9\u30e1\u30a4\u30f3\u5065\u5168\u6027\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/button>\n                    <span class=\"epg-msg\" style=\"margin-top:10px; display: block;\"><\/span>\n                <\/p>\n            <\/div>\n        <\/div>\n        \n<h2 id='\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306f\u3069\u306e\u304f\u3089\u3044\u306e\u983b\u5ea6\u3067\u5b9f\u65bd\u3059\u3079\u304d\u304b'  id=\"boomdevs_29\">\u30c9\u30e1\u30a4\u30f3\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u306f\u3069\u306e\u304f\u3089\u3044\u306e\u983b\u5ea6\u3067\u5b9f\u65bd\u3059\u3079\u304d\u304b\uff1f<\/h2>\n<p><strong>\u826f\u3044\u30eb\u30fc\u30eb\u306f\u3001\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u81ea\u52d5\u5316\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/strong> \u624b\u52d5\u306e\u30b9\u30dd\u30c3\u30c8\u30c1\u30a7\u30c3\u30af\u3082\u6709\u7528\u3067\u3059\u304c\u3001<a href=\"https:\/\/userauth.dotcom-monitor.com\/Account\/FreeTrialSignUp?SolutionType=Monitoring\">Dotcom-Monitor<\/a> \u304c\u63d0\u4f9b\u3059\u308b DNS \u304a\u3088\u3073 Web 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