{"id":18681,"date":"2026-04-03T15:04:33","date_gmt":"2026-04-03T13:04:33","guid":{"rendered":"https:\/\/webhosting.de\/mailserver-throttling-smtp-limits-hosting-rate-limiting-anleitung\/"},"modified":"2026-04-03T15:04:33","modified_gmt":"2026-04-03T13:04:33","slug":"%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc-%e3%82%b9%e3%83%ad%e3%83%83%e3%83%88%e3%83%aa%e3%83%b3%e3%82%b0-smtp%e5%88%b6%e9%99%90-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/mailserver-throttling-smtp-limits-hosting-rate-limiting-anleitung\/","title":{"rendered":"\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\uff1aSMTP\u5236\u9650\u3068\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u30ec\u30fc\u30c8\u5236\u9650\u3092\u7406\u89e3\u3059\u308b"},"content":{"rendered":"<p>\u3069\u306e\u3088\u3046\u306b <strong>\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0 \u30db\u30b9\u30c6\u30a3\u30f3\u30b0<\/strong> SMTP\u5236\u9650\u3068\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30ec\u30fc\u30c8\u5236\u9650\u304c\u914d\u4fe1\u53ef\u80fd\u6027\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u5b89\u5b9a\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u7406\u7531\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u306e\u4ed5\u7d44\u307f\u300130\u5206\u3042\u305f\u308a25\u901a\u306a\u3069\u306e\u5178\u578b\u7684\u306a\u5236\u9650\u3001\u30d0\u30a6\u30f3\u30b9\u3001\u30b9\u30d1\u30e0\u306e\u6ce2\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u306b\u5bfe\u3059\u308b\u5b9f\u8df5\u7684\u306a\u5bfe\u7b56\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 <strong>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc<\/strong>.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<p>\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3068\u5b9f\u8df5\u3092\u3088\u308a\u6df1\u304f\u6398\u308a\u4e0b\u3052\u3001\u5177\u4f53\u7684\u306b\u8ad6\u3058\u308b\u524d\u306b\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u7c21\u5358\u306b\u307e\u3068\u3081\u3066\u304a\u3053\u3046\u3002 <strong>\u63a8\u85a6\u306e\u8a00\u8449<\/strong> \u4e0e\u3048\u308b\u3002.<\/p>\n<ul>\n  <li><strong>SMTP\u5236\u9650<\/strong> \u30bf\u30a4\u30e0\u30a6\u30a3\u30f3\u30c9\u30a6\u3054\u3068\u306b\u4f55\u901a\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\/\u63a5\u7d9a\u3092\u53d7\u3051\u5165\u308c\u308b\u304b\u3001\u307e\u305f\u306f\u9001\u4fe1\u3059\u308b\u304b\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u6599\u91d1\u5236\u9650<\/strong> \u30ea\u30bd\u30fc\u30b9\u306e\u4fdd\u8b77\u3001\u30b9\u30d1\u30e0\u30ea\u30b9\u30af\u306e\u8efd\u6e1b\u3001\u914d\u4fe1\u306e\u5b89\u5b9a\u5316\u3092\u56f3\u308b\u3002.<\/li>\n  <li><strong>\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0<\/strong> \u306f4xx\u30b7\u30b0\u30ca\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3002\u3053\u308c\u306f\u3001\u30ea\u30c8\u30e9\u30a4\u30d0\u30c3\u30af\u30aa\u30d5\u3092\u4f7f\u7528\u3059\u308b\u9001\u4fe1\u8005\u304c\u5c0a\u91cd\u3059\u3079\u304d\u3082\u306e\u3067\u3042\u308b\u3002.<\/li>\n  <li><strong>\u8a55\u5224<\/strong> \u3068\u6b63\u3057\u3044\u8a8d\u8a3c\uff08SPF\u3001DKIM\u3001DMARC\uff09\u304c\u914d\u4fe1\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3002.<\/li>\n  <li><strong>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/strong> \u30d0\u30a6\u30f3\u30b9\u3001\u30ad\u30e5\u30fc\u306e\u9577\u3055\u3001\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3084\u969c\u5bb3\u3092\u9632\u304e\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/serverraum-throttling-7384.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308bE\u30e1\u30fc\u30eb\u306e\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n\n<p>\u6642\u70b9\u3067\u306f <strong>\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0<\/strong> \u60aa\u7528\u3084\u904e\u8ca0\u8377\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u9001\u4fe1\u901f\u5ea6\u3092\u5236\u9650\u3057\u3066\u3044\u308b\u3053\u3068\u306f\u7406\u89e3\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u9001\u4fe1\u8005\u3001IP\u3001\u307e\u305f\u306f\u30a2\u30ab\u30a6\u30f3\u30c8\u3054\u3068\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u9593\u9694\u3067\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5236\u9650\u3057\u3001\u30d4\u30fc\u30af\u3092\u7de9\u548c\u3057\u307e\u3059\u3002\u901a\u5e38\u3001\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u3068MTA\u304c\u4f4e\u8ca0\u8377\u306b\u4fdd\u305f\u308c\u3001\u30b9\u30d1\u30e0\u30d1\u30bf\u30fc\u30f3\u304c\u767a\u751f\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u4f8b\u3048\u307030\u5206\u3042\u305f\u308a25\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u30a6\u30a7\u30d6\u30b9\u30da\u30fc\u30b9\u7d4c\u7531\u3067\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u5927\u91cf\u306e\u30d0\u30a6\u30f3\u30b9\u3084\u76ee\u7acb\u3064\u884c\u52d5\u3092\u767b\u9332\u3057\u305f\u5834\u5408\u3001\u81ea\u52d5\u9001\u4fe1\u306f\u6e1b\u901f\u3055\u308c\u308b\u304b\u3001\u4e00\u6642\u7684\u306b\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30ed\u30b8\u30c3\u30af\u306f\u3001\u30ea\u30bd\u30fc\u30b9\u3092\u4fdd\u8b77\u3057\u3001\u30b5\u30fc\u30d3\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u7dad\u6301\u3057\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u306e\u914d\u4fe1\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002 <strong>\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9<\/strong>.<\/p>\n\n<h2>SMTP\u306e\u5236\u9650\uff1a\u6280\u8853\u3068\u52b9\u679c<\/h2>\n\n<p><strong>SMTP\u5236\u9650<\/strong> \u306f\u3044\u304f\u3064\u304b\u306e\u30ec\u30d9\u30eb\u3067\u6a5f\u80fd\u3059\u308b\uff1a1\u5206\u3042\u305f\u308a\u306e\u63a5\u7d9a\u6570\u3001\u5b9b\u5148\u3054\u3068\u306e\u4e26\u5217\u914d\u4fe1\u6570\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3054\u3068\u306e\u53d7\u4fe1\u8005\u6570\u3001\u30bf\u30a4\u30e0\u30b9\u30ed\u30c3\u30c8\u3054\u3068\u306e\u30e1\u30fc\u30eb\u7dcf\u6570\u306a\u3069\u3067\u3059\u3002MTA\u306f\u3053\u308c\u3089\u306e\u30eb\u30fc\u30eb\u3092\u5b9f\u65bd\u3057\u3001\u30ad\u30e5\u30fc\u306b\u512a\u5148\u9806\u4f4d\u3092\u3064\u3051\u3001\u53d7\u4fe1\u8005\u30b5\u30fc\u30d0\u30fc\u304c\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u306e\u30b7\u30b0\u30ca\u30eb\u3092\u51fa\u3059\u3068\u3059\u3050\u306b\u9045\u5ef6\u3092\u4e0e\u3048\u3066\u914d\u4fe1\u3057\u307e\u3059\u3002\u79c1\u306f\u3001\u9045\u5ef6\u304c\u30d0\u30a6\u30f3\u30b9\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3001\u304d\u308c\u3044\u306a\u518d\u8a66\u884c\u9593\u9694\u306b\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u307e\u3059\u3002\u53b3\u3057\u3059\u304e\u308b\u5236\u9650\u306f\u6b63\u5f53\u306a\u9001\u4fe1\u3092\u9045\u304f\u3057\u3001\u7de9\u3059\u304e\u308b\u30eb\u30fc\u30eb\u306f\u30b9\u30d1\u30e0\u306e\u6025\u5897\u3084\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u306e\u30ea\u30b9\u30af\u3078\u306e\u6249\u3092\u958b\u304f\u3002\u76ee\u6a19\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u9001\u4fe1\u8005\u306e\u8a55\u5224\u306e\u4e21\u65b9\u3092\u78ba\u5b9f\u306b\u4fdd\u8b77\u3059\u308b\u30d0\u30e9\u30f3\u30b9\u3067\u3042\u308b\u3053\u3068\u306b\u5909\u308f\u308a\u306f\u306a\u3044\u3002 <strong>\u78ba\u4fdd<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/emailthrottling_8974.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u30ec\u30fc\u30c8\u5236\u9650\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n<p>A <strong>\u30ec\u30fc\u30c8\u5236\u9650<\/strong> \u306f\u3001\u63a5\u7d9a\u306e\u8a66\u884c\u3001\u53d7\u8afe\u3001\u307e\u305f\u306f\u914d\u4fe1\u3092\u9001\u4fe1\u5143\u3054\u3068\u3001\u671f\u9593\u3054\u3068\u306b\u5236\u9650\u3059\u308b\u3002\u591a\u304f\u306e\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u307e\u305f\u3001\u500b\u3005\u306e\u53d7\u4fe1\u8005\u30be\u30fc\u30f3\u304c\u30aa\u30fc\u30d0\u30fc\u30e9\u30f3\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306b\u5236\u5fa1\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u4fdd\u8b77\u6a5f\u80fd\u306f\u3001CPU\u3001RAM\u3001\u5e2f\u57df\u5e45\u3092\u5727\u8feb\u3059\u308b\u3088\u3046\u306a\u653b\u6483\u3001\u30b9\u30d1\u30e0\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3001\u8a2d\u5b9a\u30df\u30b9\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u6709\u52b9\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5236\u9650\u304c\u306a\u3044\u3068\u3001\u5f85\u3061\u6642\u9593\u304c\u9577\u304f\u306a\u308a\u3001TTFB\u304c\u4f4e\u4e0b\u3057\u3001\u30d4\u30fc\u30af\u6642\u306b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u304c\u5d29\u58ca\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u969b\u306e\u9001\u4fe1\u30d1\u30bf\u30fc\u30f3\u306b\u5236\u9650\u5024\u3092\u9069\u5408\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u660e\u78ba\u306a\u3057\u304d\u3044\u5024\u3068\u30ed\u30b0\u306e\u30c1\u30a7\u30c3\u30af\u306b\u983c\u3063\u3066\u3044\u307e\u3059\u3002 <strong>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/strong>.<\/p>\n\n<h2>\u30b7\u30b0\u30ca\u30eb\u3068\u30ea\u30c8\u30e9\u30a4\u6226\u7565<\/h2>\n\n<p><strong>\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u4fe1\u53f7<\/strong> \u306f\u901a\u5e38\u3001421\u3001450\u3001451\u306e\u3088\u3046\u306a\u4e00\u6642\u7684\u306a4xx\u30b3\u30fc\u30c9\u3068\u306a\u308a\u3001\u5f8c\u3067\u518d\u8a66\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u3059\u3079\u3066\u306e\u518d\u8a66\u884c\u304c\u540c\u6642\u306b\u884c\u308f\u308c\u306a\u3044\u3088\u3046\u306b\u3001\u30b8\u30c3\u30bf\u30fc\u3092\u4f7f\u3063\u305f\u6307\u6570\u95a2\u6570\u7684\u306a\u30d0\u30c3\u30af\u30aa\u30d5\u306f\u7406\u306b\u304b\u306a\u3063\u3066\u3044\u308b\u3002\u3057\u304b\u3057\u3001\u6b63\u5f53\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u3042\u307e\u308a\u306b\u65e9\u304f\u653e\u68c4\u3055\u308c\u308b\u3053\u3068\u304c\u306a\u3044\u3088\u3046\u306b\u3001\u5341\u5206\u306a\u30d0\u30c3\u30d5\u30a1\u3092\u78ba\u4fdd\u3057\u3066\u3044\u307e\u3059\u3002\u30af\u30ea\u30fc\u30f3\u306a\u30ad\u30e5\u30fc\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u306f\u3001\u8f3b\u8f33\u3092\u56de\u907f\u3057\u3001\u8ca0\u8377\u3092\u5747\u7b49\u306b\u5206\u6563\u3055\u305b\u308b\u3002\u3088\u308a\u6df1\u304f\u6398\u308a\u4e0b\u3052\u305f\u3044\u5834\u5408\u306f <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%ad%e3%83%a5%e3%83%bc%e7%ae%a1%e7%90%86-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-postfix-optimus\/\">\u30ad\u30e5\u30fc\u7ba1\u7406<\/a> \u305d\u3057\u3066\u3001\u914d\u4fe1\u30a6\u30a3\u30f3\u30c9\u30a6\u3001\u30d0\u30c3\u30af\u30aa\u30d5\u30fb\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3001MTA\u306e\u8a2d\u5b9a\u3092\u6700\u9069\u5316\u3059\u308b\u3002 <strong>\u30bf\u30fc\u30b2\u30c3\u30c8<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/email-throttling-hosting-4821.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30ed\u30c3\u30af\u3068\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306e\u5b9f\u969b<\/h2>\n\n<p>\u51fa\u8377\u5236\u9650\u30d6\u30ed\u30c3\u30af\u304c\u3042\u308b\u5834\u5408\u3001\u9867\u5ba2\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306f\u901a\u5e38\u6b21\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002 <strong>\u30b9\u30c6\u30fc\u30bf\u30b9\u30e1\u30c3\u30bb\u30fc\u30b8<\/strong> \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u9001\u4fe1\u306f\u3057\u3070\u3057\u3070\u53ef\u80fd\u3060\u304c\u3001\u30a6\u30a7\u30d6\u30d5\u30a9\u30fc\u30e0\u7d4c\u7531\u306e\u81ea\u52d5\u9001\u4fe1\u306f\u4e3b\u306b\u30d6\u30ed\u30c3\u30af\u3055\u308c\u308b\u3002\u6b21\u306b\u3001\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u30fc\u3001\u30a8\u30e9\u30fc\u7387\u3001\u30d5\u30a9\u30fc\u30e0\u3084\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u6700\u8fd1\u306e\u5909\u66f4\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u65b0\u3057\u3044\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3001\u30a4\u30f3\u30dd\u30fc\u30c8\u30a8\u30e9\u30fc\u3001\u30dc\u30c3\u30c8\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u30d4\u30fc\u30af\u306b\u9054\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u9001\u4fe1\u3092\u77ed\u671f\u9593\u3067\u4e2d\u65ad\u3057\u3001\u53d7\u4fe1\u8005\u30ea\u30b9\u30c8\u3092\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3057\u3001\u660e\u78ba\u306a\u53cd\u5fa9\u30eb\u30fc\u30eb\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u72b6\u6cc1\u306f\u3059\u3050\u306b\u6b63\u5e38\u5316\u3057\u307e\u3059\u3002\u30d0\u30a6\u30f3\u30b9\u3001\u30ad\u30e5\u30fc\u306e\u9577\u3055\u3001\u914d\u4fe1\u6642\u9593\u3092\u4e00\u8cab\u3057\u3066\u76e3\u8996\u3059\u308b\u3053\u3068\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3092\u672a\u7136\u306b\u9632\u3050\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002 <strong>\u5f15\u304d\u8d77\u3053\u3059<\/strong>.<\/p>\n\n<h2>\u914d\u4fe1\u6027\u3001\u8a55\u5224\u3001\u30b3\u30f3\u30c6\u30f3\u30c4<\/h2>\n\n<p>\u9ad8\u3044 <strong>\u914d\u9001\u6599\u91d1<\/strong> \u306f\u3001\u9001\u4fe1\u8005\u30b3\u30fc\u30eb\u3001\u30af\u30ea\u30fc\u30f3\u306a\u8a8d\u8a3c\u3001\u53d7\u4fe1\u8005\u3068\u306e\u3084\u308a\u3068\u308a\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3059\u308b\u3002SPF\u3001DKIM\u3001DMARC\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3057\u3001\u82e6\u60c5\u7387\u3092\u4f4e\u304f\u3057\u3001\u30ea\u30b9\u30c8\u3092\u7dad\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u79c1\u306f\u3001\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30b9\u3092\u9664\u53bb\u3057\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u306a\u3044\u30aa\u30fc\u30c7\u30a3\u30a8\u30f3\u30b9\u3060\u3051\u3092\u6ce8\u610f\u6df1\u304f\u518d\u30a2\u30af\u30c6\u30a3\u30d6\u5316\u3057\u3001\u4ef6\u540d\u3068\u9001\u4fe1\u8005\u540d\u3092\u660e\u78ba\u306b\u30c7\u30b6\u30a4\u30f3\u3059\u308b\u3002\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u4fdd\u8b77\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u3088\u3063\u3066\u52a9\u3051\u3089\u308c\u308b\u3002 <a href=\"https:\/\/webhosting.de\/ja\/greylisting-%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc-%e3%82%b9%e3%83%91%e3%83%a0%e5%af%be%e7%ad%96-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-serverboost\/\">\u30b0\u30ea\u30fc\u30ea\u30b9\u30c6\u30a3\u30f3\u30b0<\/a>, \u30b9\u30d1\u30e0\u306e\u6c3e\u6feb\u3092\u65e9\u3044\u6bb5\u968e\u3067\u98df\u3044\u6b62\u3081\u308b\u3002\u826f\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u900f\u660e\u6027\u306e\u3042\u308b\u767b\u9332\u3001\u78ba\u5b9f\u306a\u914d\u4fe1\u505c\u6b62\u306f\u3001\u8a55\u5224\u3092\u9ad8\u3081\u3001\u5236\u9650\u3092\u9855\u8457\u306b\u7de9\u548c\u3059\u308b\u3002 <strong>\u9577\u671f<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/email_throttling_hosting_3947.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>MTA\u306e\u8a2d\u5b9a: \u8ce2\u660e\u306b\u5236\u9650\u3092\u8a2d\u5b9a\u3059\u308b<\/h2>\n\n<p>\u79c1\u306f\u3053\u3046\u5b9a\u7fa9\u3059\u308b <strong>\u9650\u754c\u5024<\/strong> \u3088\u308a\u304d\u3081\u7d30\u304b\u306a\u5236\u5fa1\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u5b9b\u5148\u3001\u9001\u4fe1\u5143\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u306b \u3088\u3063\u3066\u5225\u3005\u306b\u8a2d\u5b9a\u3055\u308c\u308b\u3002\u3053\u308c\u306b\u306f\u3001\u540c\u6642\u63a5\u7d9a\u306e\u5236\u9650\u3001\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306e\u914d\u4fe1\u9593\u306e\u9045\u5ef6\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3054\u3068\u306e\u53d7\u4fe1\u8005\u6570\u306a\u3069\u304c\u542b\u307e\u308c\u308b\u3002\u5927\u304d\u306a\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u5272\u5408\u304c\u9ad8\u3044\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3067\u306f\u3001\u901a\u5e38\u3001\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306e\u30eb\u30fc\u30eb\u3092\u53b3\u3057\u304f\u3057\u3066\u3001\u305d\u3053\u3067\u306e\u30d6\u30ed\u30c3\u30af\u3092\u907f\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u5bfe\u8c61\u30be\u30fc\u30f3\u304c\u5c0f\u3055\u3044\u5834\u5408\u306f\u3001\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u304c\u5897\u3048\u306a\u3044\u9650\u308a\u3001\u5236\u9650\u3092\u5c11\u3057\u958b\u3051\u3066\u3044\u307e\u3059\u3002\u5909\u66f4\u3092\u6bb5\u968e\u7684\u306b\u30c6\u30b9\u30c8\u3057\u3001\u30ed\u30b0\u3092\u8a55\u4fa1\u3057\u3066\u6587\u66f8\u5316\u3057\u3001\u305d\u306e\u5f8c\u306e\u6700\u9069\u5316\u304c\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002 <strong>\u308f\u304b\u308a\u3084\u3059\u3044<\/strong> \u306f\u6b8b\u308b\u3002<\/p>\n\n<h2>\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3068\u6d3e\u9063\u8a08\u753b<\/h2>\n\n<p>\u5927\u91cf\u306b\u713c\u304f\u306e\u3067\u306f\u306a\u304f\u3001\u6642\u9593\u3092\u305a\u3089\u3057\u3066\u713c\u304f\u3002 <strong>\u30ad\u30e3\u30f3\u30da\u30fc\u30f3<\/strong> 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<strong>\u9001\u6599<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/SMTP_Email_Throttling_5839.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30cb\u30e5\u30fc\u30b9\u30ec\u30bf\u30fc\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3001\u512a\u5148\u9806\u4f4d\u4ed8\u3051<\/h2>\n\n<p>\u3044\u308d\u3044\u308d <strong>\u30e1\u30fc\u30eb\u306e\u7a2e\u985e<\/strong> 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<strong>\u5897\u52a0<\/strong>.<\/p>\n\n<h2>\u4ee3\u66ff\u624b\u6bb5\uff1aSMTP\u30ea\u30ec\u30fc\u3068\u5c02\u7528IP<\/h2>\n\n<p>\u5927\u91cf\u307e\u305f\u306f\u53b3\u3057\u3044 <strong>\u30dd\u30ea\u30b7\u30fc<\/strong> 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href=\"https:\/\/webhosting.de\/ja\/smtp%e3%83%aa%e3%83%ac%e3%83%bc%e8%a8%ad%e5%ae%9a%e3%83%90%e3%83%ab%e3%82%af%e3%83%a1%e3%83%bc%e3%83%ab%e3%83%aa%e3%82%b9%e3%82%af%e4%bb%a3%e6%9b%bf%e9%9b%bb%e6%ba%90\/\">SMTP\u30ea\u30ec\u30fc\u306e\u8a2d\u5b9a<\/a> \u305d\u3057\u3066\u4e00\u6b69\u4e00\u6b69\u3001\u6301\u7d9a\u53ef\u80fd\u306a\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3092\u69cb\u7bc9\u3057\u3066\u3044\u304f\u3002\u91cd\u8981\u306a\u3053\u3068\u306b\u5909\u308f\u308a\u306f\u306a\u3044\uff1a\u8a8d\u8a3c\u3001\u30ea\u30b9\u30c8\u306e\u885b\u751f\u7ba1\u7406\u3001\u30ea\u30c8\u30e9\u30a4\u6226\u7565\u306f\u3001\u30ea\u30ec\u30fc\u306b\u304a\u3044\u3066\u3082\u4e00\u8cab\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002 <strong>\u6ede\u5728<\/strong>.<\/p>\n\n<h2>\u7740\u4fe1\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u3068\u767a\u4fe1\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0<\/h2>\n\n<p>\u79c1\u306f\u4e00\u8cab\u3057\u3066\u6b21\u306e\u3088\u3046\u306b\u533a\u5225\u3057\u3066\u3044\u308b\u3002 <strong>\u30a2\u30a6\u30c8\u30d0\u30a6\u30f3\u30c9\u30fb\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0<\/strong> (\u81ea\u793e\u6d3e\u9063\uff09\u3068 <strong>\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9\u30fb\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0<\/strong> 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<strong>\u7d76\u6ec5\u5371\u60e7\u7a2e<\/strong>.<\/p>\n\n<h2>\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u516c\u5e73\u6027<\/h2>\n\n<p>\u79c1\u306f\u8a66\u884c\u932f\u8aa4\u306e\u672b\u306b\u5b8c\u6210\u3055\u305b\u305f\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3063\u3066\u3044\u308b\uff1a <strong>\u30c8\u30fc\u30af\u30f3\u30fb\u30d0\u30b1\u30c3\u30c8<\/strong> \u9650\u3089\u308c\u305f\u6642\u9593\u3057\u304b\u4f7f\u3048\u306a\u3044\u304c\u3001\u6642\u9593\u3092\u304b\u3051\u3066\u88dc\u5145\u3055\u308c\u308b\u3001, <strong>\u6f0f\u308c\u305f\u30d0\u30b1\u30c4<\/strong> \u306f\u6c38\u4e45\u306b\u5b89\u5b9a\u3057\u305f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u7dad\u6301\u3059\u308b\u3002\u65b0\u3057\u3044\u30bf\u30fc\u30b2\u30c3\u30c8\u30be\u30fc\u30f3\u306b\u5bfe\u3057\u3066\u306f <strong>\u30b9\u30ed\u30fc\u30b9\u30bf\u30fc\u30c8<\/strong>, \u79c1\u306f\u3001\u5ef6\u671f\u3084\u30b9\u30d1\u30e0\u901a\u77e5\u304c\u306a\u3044\u5834\u5408\u306b\u306e\u307f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u4e0a\u3052\u30014xx\u30b7\u30ea\u30fc\u30ba\u306e\u5834\u5408\u306f\u3059\u3050\u306b\u4e0b\u3052\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u79c1\u306f\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306b\u30ad\u30e5\u30fc\u306b\u512a\u5148\u9806\u4f4d\u3092\u3064\u3051\u3001\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u30aa\u30fc\u30d0\u30fc\u30e9\u30f3\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u4e00\u65b9\u3067\u3001\u5c0f\u898f\u6a21\u306aMX\u30be\u30fc\u30f3\u306b\u306f\u5b9a\u671f\u7684\u306b\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ad\u30e5\u30fc\u3092\u77ed\u304f\u4fdd\u3061\u3001\u500b\u3005\u306e\u53d7\u4fe1\u8005\u30a4\u30f3\u30d5\u30e9\u306b\u4e0d\u5fc5\u8981\u306b\u8ca0\u8377\u3092\u304b\u3051\u308b\u3053\u3068\u306a\u304f\u3001\u3059\u3079\u3066\u306e\u5b9b\u5148\u3067\u306e\u516c\u5e73\u6027\u3092\u7dad\u6301\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u30b9\u30c8\u30ec\u30b9<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/server-email-throttling-9173.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u4ed5\u69d8\uff1a\u5927\u898f\u6a21\u306a\u30bf\u30fc\u30b2\u30c3\u30c8\u30fb\u30c9\u30e1\u30a4\u30f3\u306b\u6b63\u3057\u304f\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3059\u308b<\/h2>\n\n<p>\u5927\u898f\u6a21\u306a\u30e1\u30fc\u30eb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u30b9\u30d4\u30fc\u30c9\u3068\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u306b\u654f\u611f\u306b\u53cd\u5fdc\u3057\u307e\u3059\u3002Gmail\u3067\u306f\u3001\u4e00\u6642\u7684\u306a\u30dd\u30ea\u30b7\u30fc\u3092\u793a\u30594xx\u3092\u3088\u304f\u898b\u304b\u3051\u307e\u3059\u3002\u305d\u308c\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306e\u4e26\u5217\u5ea6\u3092\u4e0b\u3052\u3001Backoff\u3092\u5897\u3084\u3057\u307e\u3059\u3002Microsoft 365\/Outlook.com\u306f\u3001421\/451\u30b3\u30fc\u30c9\u3067\u904e\u8ca0\u8377\u3084\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u61f8\u5ff5\u3092\u77e5\u3089\u305b\u308b\u3002\u3053\u3053\u3067\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3054\u3068\u306eRCPT\u3092\u6e1b\u3089\u3057\u3001TLS\u3092\u5b89\u5b9a\u3055\u305b\u3001\u9001\u4fe1\u8005\u30c9\u30e1\u30a4\u30f3\u3092\u53b3\u5bc6\u306b\u8a8d\u8a3c\u3059\u308b\u3053\u3068\u304c\u5f79\u7acb\u3064\u3002GMX\/Web.de\u3084\u305d\u306e\u4ed6\u306e\u30c9\u30a4\u30c4\u8a9e\u306e\u30d5\u30ea\u30fc\u30e1\u30fc\u30eb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u91cf\u304c\u6025\u306b\u5897\u3048\u308b\u3068\u30b9\u30ed\u30c3\u30c8\u30eb\u3092\u304b\u3051\u305f\u304c\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306e1\u5206\u3042\u305f\u308a\u306e\u30b7\u30a7\u30a2\u3092\u305a\u3089\u3057\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u30ec\u30fc\u30c8\u3092\u4f4e\u304f\u3057\u3066\u3044\u307e\u3059\u3002\u5171\u901a\u70b9\uff1a\u5c0f\u3055\u304f\u3001\u7740\u5b9f\u306a\u30b9\u30c6\u30c3\u30d7\u3001\u4e00\u8cab\u3057\u305f\u9001\u4fe1\u8005\u30a2\u30a4\u30c7\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u304d\u308c\u3044\u306b\u7f72\u540d\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30f3\u30c4\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u9045\u5ef6\u3092\u6e1b\u3089\u3057\u3001\u30cf\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u3092\u9632\u304e\u3001\u9001\u4fe1\u30d7\u30ed\u30bb\u30b9\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002 <strong>\u4fe1\u983c\u3067\u304d\u308b<\/strong> \u30d4\u30fc\u30af\u3092\u901a\u3057\u3066\u3002.<\/p>\n\n<h2>\u30d0\u30a6\u30f3\u30b9\u51e6\u7406\u3068\u30ea\u30b9\u30c8\u885b\u751f\u306e\u8a73\u7d30<\/h2>\n\n<p>\u79c1\u306b\u3068\u3063\u3066\u3001\u30d0\u30a6\u30f3\u30b9\u306f\u4e3b\u8981\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30b7\u30b0\u30ca\u30eb\u3060\u3002. <strong>\u30bd\u30d5\u30c8\u30d0\u30a6\u30f3\u30c9<\/strong> (4xx)\u306f\u4e00\u6642\u7684\u306a\u3082\u306e\u3067\u3042\u308b\u3002\u6307\u6570\u95a2\u6570\u7684\u30d0\u30c3\u30af\u30aa\u30d5\u3067\u518d\u8a66\u884c\u3057\u30011\u30e1\u30c3\u30bb\u30fc\u30b8\u3042\u305f\u308a\u306e\u6700\u5927\u7d99\u7d9a\u6642\u9593\u3092\u5236\u9650\u3059\u308b\u3002. <strong>\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30c9<\/strong> (5xx\u3001\u4f8b\u3048\u30705.1.1 User unknown)\u306f\u3001\u30a2\u30c9\u30ec\u30b9\u306e\u6291\u5236\u3068\u305d\u306e\u5f8c\u306e\u30ea\u30b9\u30c8\u5185\u306e\u6d88\u53bb\u306b\u76f4\u63a5\u3064\u306a\u304c\u308b\u3002\u79c1\u306f\u3001\u69cb\u6587\u30a8\u30e9\u30fc\u3001\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u6e80\u676f\u3001\u30dd\u30ea\u30b7\u30fc\u9055\u53cd\u3001\u81ea\u5206\u306e\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u306e\u4e0d\u9054\u30ec\u30dd\u30fc\u30c8\u3092\u533a\u5225\u3057\u3066\u3044\u307e\u3059\u3002\u30ed\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u30ad\u30e3\u30c3\u30c1\u30aa\u30fc\u30eb\u30c9\u30e1\u30a4\u30f3\u3001\u4e00\u822c\u7684\u306a\u30a8\u30a4\u30ea\u30a2\u30b9\u306f\u3001\u96e2\u8131\u3084\u30b9\u30d1\u30e0\u30c8\u30e9\u30c3\u30d7\u306b\u6709\u5229\u306a\u306e\u3067\u3001\u53b3\u3057\u304f\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u5f8c\u306f\u30015xx\u306e\u30af\u30e9\u30b9\u30bf\u30fc\u3092\u4f53\u7cfb\u7684\u306b\u524a\u9664\u3057\u3001\u518d\u30a2\u30af\u30c6\u30a3\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u30aa\u30d7\u30c8\u30a4\u30f3\u304c\u9069\u5207\u306b\u6587\u66f8\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30d0\u30a6\u30f3\u30b9\u304c\u3088\u308a\u660e\u78ba\u304b\u3064\u8fc5\u901f\u306b\u51e6\u7406\u3055\u308c\u308c\u3070\u3055\u308c\u308b\u307b\u3069\u3001\u30cf\u30fc\u30c9\u306a\u30d0\u30a6\u30f3\u30b9\u306f\u5c11\u306a\u304f\u306a\u308a\u307e\u3059\u3002 <strong>\u6599\u91d1\u5236\u9650<\/strong> \u30d5\u30a3\u30cb\u30c3\u30b7\u30e5\u3067\u3002.<\/p>\n\n<h2>\u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u30fb\u30d7\u30e9\u30f3\u30cb\u30f3\u30b0\u3001\u8ca0\u8377\u30c6\u30b9\u30c8\u3001\u30ab\u30ca\u30ea\u30a2\u30fb\u30bb\u30f3\u30c9<\/h2>\n\n<p>\u79c1\u306fCPU\u3084RAM\u306e\u3088\u3046\u306a\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u80fd\u529b\u3092\u8a08\u753b\u3057\u307e\u3059\u3002\u5927\u898f\u6a21\u306a\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306e\u524d\u306b\u306f <strong>\u30ab\u30ca\u30ea\u30a2\u304c\u9001\u308b<\/strong> (\u4f8b\uff1a\u30ea\u30b9\u30c8\u5185\u306e1-5 %)\u3001\u9045\u5ef6\u3001\u958b\u5c01\u7387\u3001\u82e6\u60c5\u30b7\u30b0\u30ca\u30eb\u3092\u30e2\u30cb\u30bf\u30fc\u3057\u3001\u4e0a\u65b9\u4fee\u6b63\u3059\u308b\u3002\u30a2\u30e9\u30fc\u30c8\u306f\u3001\u30ad\u30e5\u30fc\u306e\u9577\u3055\u30014xx\/5xx\u30af\u30a9\u30fc\u30bf\u3001\u304a\u3088\u3073\u914d\u9054\u6642\u9593\uff08TTD\uff09\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u5024\u304c\u5b9a\u7fa9\u3055\u308c\u305f\u3057\u304d\u3044\u5024\u4ee5\u4e0a\u306b\u306a\u308b\u3068\u3001\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u4f5c\u52d5\u3057\u3001\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u3001\u307e\u305f\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u304c\u4f4e\u4e0b\u3059\u308b\u3002\u65e5\u5e38\u696d\u52d9\u3067\u306f\u3001\u5404\u6642\u9593\u306e\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u3092\u5b9a\u7fa9\u3057\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u4f5c\u696d\u7528\u306e\u30b9\u30ed\u30c3\u30c8\u3092\u78ba\u4fdd\u3057\u3001\u81ea\u7531\u306b\u5229\u7528\u3067\u304d\u308b\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u306e\u307f\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30d0\u30c3\u30c1\u3092\u5b9f\u884c\u3059\u308b\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u30cf\u30fc\u30c9\u306aSLO\uff08\u30d1\u30b9\u30ef\u30fc\u30c9\u30e1\u30fc\u30eb\uff09\u3068\u30d9\u30b9\u30c8\u30a8\u30d5\u30a9\u30fc\u30c8\u578b\u306e\u30dc\u30ea\u30e5\u30fc\u30e0\uff08\u30cb\u30e5\u30fc\u30b9\u30ec\u30bf\u30fc\uff09\u3092\u5206\u96e2\u3057\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u8ca0\u8377\u306e\u4f4e\u3044\u72b6\u614b\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3002 <strong>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6<\/strong>.<\/p>\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u3001\u30c7\u30fc\u30bf\u4fdd\u8b77<\/h2>\n\n<p>\u5805\u5b9f\u306a\u51fa\u8377\u306f\u30af\u30ea\u30fc\u30f3\u306a\u72b6\u614b\u304b\u3089 <strong>\u30aa\u30d7\u30c8\u30a4\u30f3<\/strong> (\u7406\u60f3\u7684\u306b\u306f\u30c0\u30d6\u30eb\u30aa\u30d7\u30c8\u30a4\u30f3\uff09\u3068\u900f\u660e\u6027\u306e\u3042\u308b\u8cfc\u8aad\u89e3\u9664\u3002\u540c\u610f\u3001\u6642\u9593\u3001\u30bd\u30fc\u30b9\u306e\u30ed\u30b0\u306f\u63a7\u3048\u3081\u306b\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u76e3\u67fb\u306b\u8010\u3048\u3046\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u4fdd\u8b77\u306e\u89b3\u70b9\u304b\u3089\u3001\u4fdd\u5b58\u671f\u9593\u3092\u77ed\u304f\u3057\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u306a\u3044\u30b3\u30f3\u30bf\u30af\u30c8\u3084\u914d\u4fe1\u505c\u6b62\u3057\u305f\u30b3\u30f3\u30bf\u30af\u30c8\u3092\u901f\u3084\u304b\u306b\u524a\u9664\u3057\u3001\u30ed\u30b0\u306b\u542b\u307e\u308c\u308b\u500b\u4eba\u7684\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3066\u3044\u307e\u3059\u3002\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u306eTLS\u306f\u6a19\u6e96\u3067\u3042\u308a\u3001MTA\u5074\u3067\u306f\u3001\u4e00\u8cab\u3057\u305f\u30db\u30b9\u30c8\u540d\u3001\u8a3c\u660e\u66f8\u3001\u6700\u65b0\u306e\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u3092\u78ba\u4fdd\u3057\u3066\u3044\u307e\u3059\u3002\u53d7\u4fe1\u8005\u306e\u610f\u601d\u306b\u53cd\u3059\u308b\u518d\u30a2\u30af\u30c6\u30a3\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u9632\u3050\u305f\u3081\u3001\u6291\u5236\u30ea\u30b9\u30c8\u3092\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30b9\u3001\u82e6\u60c5\u3001\u624b\u52d5\u30aa\u30d7\u30c8\u30a2\u30a6\u30c8\u306b\u53b3\u5bc6\u306b\u5206\u3051\u3066\u3044\u307e\u3059\u3002\u6280\u8853\u7684\u306a\u30b9\u30ed\u30c3\u30c8\u30eb\u306f\u3001\u6cd5\u7684\u30fb\u7d44\u7e54\u7684\u306a\u57fa\u76e4\u304c\u6574\u3063\u3066\u521d\u3081\u3066\u5341\u5206\u306a\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002 <strong>\u6295\u7968<\/strong>.<\/p>\n\n<h2>\u983b\u7e41\u306a\u8a2d\u5b9a\u30df\u30b9\u3068\u8fc5\u901f\u306a\u4fee\u6b63<\/h2>\n\n<ul>\n  <li><strong>rDNS\/PTR \u304c\u898b\u3064\u304b\u3089\u306a\u3044\u304b\u3001\u9593\u9055\u3063\u3066\u3044\u308b\uff1a<\/strong> \u9069\u5207\u306a\u9006\u5f15\u304dDNS\u304c\u306a\u3044\u3068\u4fe1\u983c\u304c\u843d\u3061\u308b\u3002\u79c1\u306fA\/AAA\u3001PTR\u3001EHLO\u30db\u30b9\u30c8\u540d\u3092\u4e00\u81f4\u3055\u305b\u308b\u3002.<\/li>\n  <li><strong>SPF\/DKIM\/DMARC\u306b\u4e00\u8cab\u6027\u304c\u306a\u3044\uff1a<\/strong> \u904e\u5ea6\u306b\u5e83\u7bc4\u306aSPF\u30e1\u30ab\u30cb\u30ba\u30e0\u3084\u6b20\u843d\u3057\u305fDKIM\u7f72\u540d\u306f\u3001\u8a55\u5224\u3092\u72a0\u7272\u306b\u3059\u308b\u3002\u79c1\u306fSPF\u3092\u5f37\u5316\u3057\u3001\u4e00\u8cab\u3057\u305f\u7f72\u540d\u3092\u884c\u3044\u3001DMARC\u3092\u51fa\u8377\u306e\u5b9f\u614b\u306b\u5408\u308f\u305b\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30ea\u30c8\u30e9\u30a4\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u72ed\u3059\u304e\u308b\uff1a<\/strong> \u77ed\u3044\u30af\u30ed\u30c3\u30af\u3067\u306e\u30ea\u30c8\u30e9\u30a4\u306f\u3001\u9045\u5ef6\u3092\u30a8\u30b9\u30ab\u30ec\u30fc\u30c8\u3055\u305b\u308b\u3002\u30b8\u30c3\u30bf\u30fc\u3068\u73fe\u5b9f\u7684\u306a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306b\u3088\u308b\u6307\u6570\u95a2\u6570\u7684\u306a\u30d0\u30c3\u30af\u30aa\u30d5\u306f\u3001\u3053\u308c\u3092\u8efd\u6e1b\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30e1\u30c3\u30bb\u30fc\u30b8\u3042\u305f\u308a\u306eRCPT\u304c\u591a\u3059\u304e\u308b\uff1a<\/strong> \u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u5927\u898f\u6a21\u306a\u53d7\u4fe1\u8005\u30ea\u30b9\u30c8\u306f\u3001\u30d0\u30eb\u30af\u30b9\u30d1\u30e0\u306e\u52b9\u679c\u304c\u3042\u308a\u307e\u3059\u3002\u79c1\u306f\u305d\u308c\u3089\u3092\u5c0f\u3055\u306a\u30b0\u30eb\u30fc\u30d7\u306b\u5206\u3051\u305f\u3002.<\/li>\n  <li><strong>\u4e0d\u9069\u5207\u306a\u30b5\u30a4\u30ba\u5236\u9650\uff1a<\/strong> \u91cd\u3044\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306f\u5e2f\u57df\u5e45\u3092\u59a8\u3052\u307e\u3059\u3002\u5727\u7e2e\u3084\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3078\u306e\u30ea\u30f3\u30af\u306f\u3001\u30d1\u30b9\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u512a\u5148\u9806\u4f4d\u306e\u6b20\u5982\uff1a<\/strong> \u30cb\u30e5\u30fc\u30b9\u30ec\u30bf\u30fc\u306f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u9045\u304f\u3059\u308b\u3002\u500b\u5225\u306e\u30ad\u30e5\u30fc\u3001IP\u3001\u307e\u305f\u306f\u30eb\u30fc\u30c8\u304c\u6551\u6e08\u7b56\u3092\u63d0\u4f9b\u3059\u308b\u3002.<\/li>\n  <li><strong>\u97f3\u91cf\u304c\u6025\u306b\u8df3\u306d\u4e0a\u304c\u308b\uff1a<\/strong> \u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7\u304c\u8db3\u308a\u306a\u3044\u3002\u79c1\u306f\u65e5\u3054\u3068\u3001\u6642\u9593\u3054\u3068\u306e\u4e88\u7b97\u3092\u5f90\u3005\u306b\u5897\u3084\u3057\u3001\u30b3\u30fc\u30c9\u3092\u76e3\u8996\u3057\u3001\u72b6\u6cc1\u304c\u5b89\u5b9a\u3057\u305f\u3068\u304d\u3060\u3051\u9650\u5ea6\u984d\u3092\u5f15\u304d\u4e0a\u3052\u308b\u3002.<\/li>\n  <li><strong>\u6642\u9593\u3068\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u554f\u984c\uff1a<\/strong> \u30b7\u30b9\u30c6\u30e0\u6642\u523b\u304c\u305a\u308c\u308b\u3068\u3001DKIM\u3068\u30ed\u30b0\u306e\u76f8\u95a2\u6027\u304c\u640d\u306a\u308f\u308c\u308b\u3002NTP\u3092\u30af\u30ea\u30fc\u30f3\u306a\u72b6\u614b\u306b\u4fdd\u3064\u3002.<\/li>\n<\/ul>\n\n<h2>\u4e3b\u306a\u6570\u5024\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u8868<\/h2>\n\n<p>\u6bce\u65e5 <strong>\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/strong> \u79c1\u306f\u30d0\u30a6\u30f3\u30b9\u3001\u9045\u5ef6\u3001\u30ad\u30e5\u30fc\u306e\u9577\u3055\u3001\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3001\u82e6\u60c5\u7387\u3092\u76e3\u8996\u3057\u3066\u3044\u308b\u3002\u30bd\u30d5\u30c8\u30d0\u30a6\u30f3\u30b9\u304c\u6025\u5897\u3057\u305f\u5834\u5408\u306f\u3001\u901a\u5e38\u3001\u5b9b\u5148\u306e\u30ec\u30fc\u30c8\u5236\u9650\u3084\u4e00\u6642\u7684\u306a\u30dd\u30ea\u30b7\u30fc\u306e\u554f\u984c\u304c\u5f71\u97ff\u3057\u3066\u3044\u307e\u3059\u3002\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30b9\u306e\u5897\u52a0\u306f\u3001\u30a2\u30c9\u30ec\u30b9\u306e\u54c1\u8cea\u3084DNS\u30a8\u30e9\u30fc\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u30ad\u30e5\u30fc\u304c\u6052\u5e38\u7684\u306b\u5897\u5927\u3059\u308b\u5834\u5408\u306f\u3001\u5236\u9650\u304c\u53b3\u3057\u3059\u304e\u308b\u304b\u3001\u30ea\u30c8\u30e9\u30a4\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u53b3\u3057\u3059\u304e\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u8868\u306f\u3001\u5178\u578b\u7684\u306a\u5236\u9650\u306e\u7a2e\u985e\u3092\u3001\u305d\u306e\u52b9\u679c\u3068\u9069\u5207\u306a\u5bfe\u7b56\u3068\u3068\u3082\u306b\u5206\u985e\u3057\u305f\u3082\u306e\u3067\u3042\u308b\u3002 <strong>\u6210\u529f\u3059\u308b<\/strong>.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30ea\u30df\u30c3\u30c8\u30bf\u30a4\u30d7<\/th>\n      <th>\u8aac\u660e<\/th>\n      <th>\u5024\u306e\u4f8b<\/th>\n      <th>\u5f71\u97ff<\/th>\n      <th>\u6e2c\u5b9a<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u30a4\u30f3\u30bf\u30fc\u30d0\u30eb\u3054\u3068\u306e\u30e1\u30c3\u30bb\u30fc\u30b8<\/td>\n      <td>\u30a2\u30ab\u30a6\u30f3\u30c8\/\u30bf\u30a4\u30e0\u30a6\u30a3\u30f3\u30c9\u30a6\u3054\u3068\u306e\u7dcf\u30e1\u30fc\u30eb\u6570<\/td>\n      <td>25\u5206\/30\u5206\uff08\u30a6\u30a7\u30d6\u30b9\u30da\u30fc\u30b9\uff09<\/td>\n      <td>\u30d4\u30fc\u30af\u3092\u7de9\u548c\u3057\u3001\u30b5\u30fc\u30d0\u30fc\u3092\u4fdd\u8b77<\/td>\n      <td>\u30d0\u30c3\u30c1\u3001\u30b9\u30c8\u30ec\u30c3\u30c1\u30fb\u30a6\u30a3\u30f3\u30c9\u30a6<\/td>\n    <\/tr>\n    <tr>\n      <td>1\u5206\u3042\u305f\u308a\u306e\u63a5\u7d9a\u6570<\/td>\n      <td>IP\u3054\u3068\u306e\u65b0\u3057\u3044SMTP\u30bb\u30c3\u30b7\u30e7\u30f3<\/td>\n      <td>MTA\u306b\u3088\u3063\u3066\u306f\u4fdd\u5b88\u7684<\/td>\n      <td>\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u6d2a\u6c34\u3092\u9632\u3050<\/td>\n      <td>\u30d0\u30c3\u30af\u30aa\u30d5\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u30fb\u30b8\u30c3\u30bf\u30fc<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30bf\u30fc\u30b2\u30c3\u30c8\u30fb\u30c9\u30e1\u30a4\u30f3\u3054\u3068\u306e\u4e26\u5217<\/td>\n      <td>MX\u3054\u3068\u306e\u540c\u6642\u914d\u4fe1<\/td>\n      <td>\u5927\u624b\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3067\u306f\u4f4e\u3044<\/td>\n      <td>\u5ef6\u671f\u3068\u30d6\u30ed\u30c3\u30af\u306e\u524a\u6e1b<\/td>\n      <td>\u30c9\u30e1\u30a4\u30f3\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u7dad\u6301<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30e1\u30c3\u30bb\u30fc\u30b8\u3054\u3068\u306e\u53d7\u4fe1\u8005<\/td>\n      <td>\u96fb\u5b50\u30e1\u30fc\u30eb1\u901a\u3042\u305f\u308a\u306eRCPT\u5236\u9650<\/td>\n      <td>\u4e2d\u7a0b\u5ea6\u306e\u6570\u5b57<\/td>\n      <td>\u30b9\u30d1\u30e0\u7f72\u540d\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/td>\n      <td>\u5c0f\u30b0\u30eb\u30fc\u30d7\u306b\u5206\u304b\u308c\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30b5\u30a4\u30ba<\/td>\n      <td>\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u6700\u5927\u30b5\u30a4\u30ba<\/td>\n      <td>\u76ee\u7684\u5730\u306b\u3088\u308b<\/td>\n      <td>\u5e2f\u57df\u5e45\/CPU\u306e\u4fdd\u8b77<\/td>\n      <td>\u5727\u7e2e\u30a2\u30bf\u30c3\u30c1\u30e1\u30f3\u30c8<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2>\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068<\/h2>\n\n<p><strong>\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0<\/strong> 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