{"id":17924,"date":"2026-02-22T18:19:13","date_gmt":"2026-02-22T17:19:13","guid":{"rendered":"https:\/\/webhosting.de\/email-hosting-infrastrukturen-reputation-zustellbarkeit-ipmailboost\/"},"modified":"2026-02-22T18:19:13","modified_gmt":"2026-02-22T17:19:13","slug":"e%e3%83%a1%e3%83%bc%e3%83%ab-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-%e3%82%a4%e3%83%b3%e3%83%95%e3%83%a9-%e8%a9%95%e5%88%a4-%e9%85%8d%e4%bf%a1%e6%80%a7-ipmailboost","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/email-hosting-infrastrukturen-reputation-zustellbarkeit-ipmailboost\/","title":{"rendered":"\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\uff1a\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u3001\u914d\u4fe1\u53ef\u80fd\u6027\u3001IP\u5171\u6709"},"content":{"rendered":"<p><strong>\u30e1\u30fc\u30eb\u30db\u30b9\u30c6\u30a3\u30f3\u30b0<\/strong> \u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u53d7\u4fe1\u7bb1\u306b\u5165\u308b\u304b\u3069\u3046\u304b\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u9001\u4fe1\u8005\u306e\u8a55\u5224\u3092\u3069\u306e\u3088\u3046\u306b\u8a55\u4fa1\u3059\u308b\u304b\u3001\u5171\u6709IP\u3068\u81ea\u793eIP\u306e\u3069\u3061\u3089\u304c\u6700\u826f\u306e\u9078\u629e\u3067\u3042\u308b\u304b\u306b\u76f4\u63a5\u5f71\u97ff\u3059\u308b\u3002\u79c1\u304c\u6ce8\u76ee\u3057\u3066\u3044\u308b\u306e\u306f <strong>\u8a55\u5224<\/strong>, \u914d\u4fe1\u53ef\u80fd\u306a\u30b7\u30b0\u30ca\u30eb\u3068IP\u5171\u6709\u6226\u7565\u306b\u3088\u308a\u3001\u53d7\u4fe1\u30c8\u30ec\u30a4\u306e\u5272\u308a\u5f53\u3066\u3092\u5b89\u5b9a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<ul>\n  <li><strong>\u8a55\u5224<\/strong>IP\u3068\u30c9\u30e1\u30a4\u30f3\u306e\u30b9\u30b3\u30a2\u304c\u53d7\u4fe1\u30c8\u30ec\u30a4\u306e\u914d\u7f6e\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u3002.<\/li>\n  <li><strong>\u914d\u9054\u53ef\u80fd\u6027<\/strong>\u8a8d\u8a3c\u3001DNS\u3001MTA\u306e\u52d5\u4f5c\u304c\u30d1\u30b9\u3092\u6c7a\u5b9a\u3059\u308b\u3002.<\/li>\n  <li><strong>IP\u5171\u6709<\/strong>\u597d\u610f\u7684\u3060\u304c\u3001\u5171\u540c\u4f7f\u7528\u8005\u306b\u3088\u308b\u30ea\u30b9\u30af\u304c\u3042\u308b\u3002.<\/li>\n  <li><strong>\u5c02\u7528IP<\/strong>\u5b8c\u5168\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3068\u4e88\u6e2c\u53ef\u80fd\u306a\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3002.<\/li>\n  <li><strong>\u885b\u751f<\/strong>\u30ea\u30b9\u30c8\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3001\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u30fb\u30eb\u30fc\u30d7\u3001\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u304c\u54c1\u8cea\u3092\u4fdd\u8a3c\u3059\u308b\u3002.<\/li>\n<\/ul>\n\n<h2>IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7406\u89e3\u3059\u308b\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u6e2c\u5b9a\u3059\u308b\u30b7\u30b0\u30ca\u30eb<\/h2>\n\n<p>\u79c1\u306f\u81ea\u5206\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b <strong>\u8a55\u5224<\/strong> \u660e\u78ba\u306a\u9001\u4fe1\u30d1\u30bf\u30fc\u30f3\u3001\u30af\u30ea\u30fc\u30f3\u306a\u30ea\u30b9\u30c8\u3001\u4e00\u8cab\u3057\u305f\u8a8d\u8a3c\u306b\u3088\u3063\u3066\u3002Gmail\u306e\u3088\u3046\u306a\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u82e6\u60c5\u3001\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30b9\u3001\u30b9\u30d1\u30e0\u30c8\u30e9\u30c3\u30d7\u3001\u53d7\u4fe1\u8005\u306e\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u3092\u307b\u307c\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u8a55\u4fa1\u3057\u307e\u3059\u3002\u79c1\u306f\u91cf\u3092\u5b89\u5b9a\u3055\u305b\u3001\u6025\u6fc0\u306a\u30d4\u30fc\u30af\u3092\u907f\u3051\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u7d20\u65e9\u304f\u5bfe\u5fdc\u3057\u307e\u3059\u3002SPF\u3001DKIM\u3001DMARC\u306f\u3001\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3068\u30ad\u30fc\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u6b63\u3057\u3044\u3088\u3046\u306b\u3001\u6280\u8853\u7684\u306b\u3082\u5c02\u9580\u7684\u306b\u3082\u6b63\u3057\u3044\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u79c1\u306f\u5f3e\u529b\u6027\u306e\u3042\u308b <strong>\u30a2\u30a4\u30d4\u30fc<\/strong>-\u30d5\u30a3\u30eb\u30bf\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u512a\u5148\u9806\u4f4d\u3092\u3064\u3051\u308b\u3002.<\/p>\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\/02\/email-hosting-serverraum-4021.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u914d\u4fe1\u6027\u3092\u5236\u5fa1\u3059\u308b\uff1a\u8a8d\u8a3c\u3001MTA\u3001DNS<\/h2>\n\n<p>\u3092\u78ba\u4fdd\u3059\u308b\u3002 <strong>\u914d\u9054\u53ef\u80fd\u6027<\/strong> \u5b8c\u5168\u306aDNS\u30a8\u30f3\u30c8\u30ea\u3001\u6b63\u3057\u3044rDNS\u3068FCrDNS\u3001\u305d\u3057\u3066\u4e00\u8cab\u3057\u305fHELO\/EHLO\u6587\u5b57\u5217\u3092\u901a\u3057\u3066\u3002\u79c1\u306eMTA\u306f\u8ca0\u8377\u306e\u30d4\u30fc\u30af\u3092\u8abf\u6574\u3057\u3001\u30d0\u30a6\u30f3\u30b9\u3092\u660e\u78ba\u306b\u51e6\u7406\u3057\u3001\u30ad\u30e5\u30fc\u304c\u7834\u88c2\u3057\u306a\u3044\u3088\u3046\u306b\u30b0\u30ec\u30a4\u30ea\u30b9\u30c8\u3092\u5c0a\u91cd\u3057\u307e\u3059\u3002\u30aa\u30dd\u30c1\u30e5\u30cb\u30b9\u30c6\u30a3\u30c3\u30af\u304b\u3064\u5f37\u5236\u7684\u306aStartTLS\u306b\u3088\u308bTLS\u306f\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30d1\u30b9\u3092\u30ab\u30d0\u30fc\u3057\u3001\u30c0\u30a6\u30f3\u30b0\u30ec\u30fc\u30c9\u3092\u9632\u304e\u307e\u3059\u3002\u3088\u308a\u8a73\u7d30\u306a\u5b9f\u88c5\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9f\u7528\u7684\u306a\u30ac\u30a4\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%81%ab%e4%be%9d%e5%ad%98%e3%81%99%e3%82%8b%e3%83%a1%e3%83%bc%e3%83%ab%e9%85%8d%e4%bf%a1%e6%80%a7-%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc\/\">\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u6700\u9069\u5316<\/a>. .\u79c1\u306f\u5b9a\u671f\u7684\u306bDMARC\u30ec\u30dd\u30fc\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u7570\u5e38\u5024\u3084\u7570\u5e38\u5024\u3092\u7d20\u65e9\u304f\u898b\u3064\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002 <strong>\u65b9\u91dd<\/strong> \u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3055\u308c\u305f\u65b9\u6cd5\u3067\u3002.<\/p>\n\n<h2>\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7\u3001\u30ea\u30bf\u30fc\u30f3\u30fb\u30d1\u30b9\u3001\u30c8\u30e9\u30c3\u30ad\u30f3\u30b0\u30fb\u30c9\u30e1\u30a4\u30f3\u3092\u304d\u308c\u3044\u306b\u914d\u7f6e<\/h2>\n\n<p>\u79c1\u306f\u3001\u76ee\u306b\u898b\u3048\u308b\u5dee\u51fa\u4eba\u4f4f\u6240\uff08From\uff09\u3068\u5c01\u7b52\u306e\u5dee\u51fa\u4eba\uff08MAIL FROM\/Return-Path\uff09\u3092\u5206\u96e2\u3057\u3001\u5225\u306e <strong>\u30d0\u30a6\u30f3\u30b9\u30c9\u30e1\u30a4\u30f3<\/strong> 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\u30ea\u30f3\u30af\u3068\u753b\u50cf\u306e\u30c9\u30e1\u30a4\u30f3\u306f\u3001CNAME\u3068DKIM\u7f72\u540d\u3092\u4ecb\u3057\u3066\u9001\u4fe1\u30d7\u30ed\u30d0\u30a4\u30c0\u306b\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u306f\u30b3\u30f3\u30c6\u30f3\u30c4\u5185\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u79c1\u306f\u3001\u3059\u3079\u3066\u306e\u30c9\u30e1\u30a4\u30f3\uff08from-\u3001return-path-\u3001tracking-\u3001HELO-domain\uff09\u3092\u7d44\u7e54\u7684\u306b\u4e00\u8cab\u3055\u305b\u3066\u3044\u308b\u3002 <strong>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8<\/strong> 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\u6d3e\u9063\u91cf\u304c\u5c11\u306a\u304f\u3001\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u304c\u7a4d\u6975\u7684\u306b\u30d7\u30fc\u30eb\u3092\u7dad\u6301\u3059\u308b\u5834\u5408\u306b\u9650\u308b\u3002\u5171\u6709IP\u306f\u3057\u3070\u3057\u3070\u5c65\u6b74\u304b\u3089\u6069\u6075\u3092\u53d7\u3051\u308b\u304c\u3001\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005\u304c\u500b\u3005\u306e\u9055\u53cd\u8005\u306e\u30ea\u30b9\u30af\u3092\u8ca0\u3046\u3002\u5c11\u6570\u306e\u30af\u30ea\u30fc\u30f3\u306a\u9867\u5ba2\u3092\u6301\u3064\u5171\u6709\u30d7\u30fc\u30eb\u306f\u5b89\u5b9a\u3057\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u767a\u63ee\u3057\u307e\u3059\u304c\u3001\u904e\u5bc6\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306f\u30b9\u30b3\u30a2\u3092\u5931\u3044\u307e\u3059\u3002\u5927\u5bb9\u91cf\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3092\u5b9f\u65bd\u3059\u308b\u5834\u5408\u306f\u3001\u72ec\u7acb\u6027\u3068\u660e\u78ba\u306a\u6839\u672c\u539f\u56e0\u306e\u5206\u6790\u304c\u5fc5\u8981\u3067\u3059\u3002\u79c1\u306f\u5148\u898b\u306e\u660e\u3092\u3082\u3063\u3066\u79fb\u884c\u3092\u8a08\u753b\u3057\u3001\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3002 <strong>\u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7<\/strong> \u3068DNS\u306e\u5909\u66f4\u304c\u8abf\u6574\u3055\u308c\u308b\u3002.<\/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\/02\/emailhostingmeeting2936.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u5c02\u7528IP\uff1a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3001\u6839\u672c\u539f\u56e0\u5206\u6790\u3001\u4e88\u6e2c\u53ef\u80fd\u6027<\/h2>\n\n<p>\u3092\u983c\u308a\u306b\u3057\u3066\u3044\u308b\u3002 <strong>\u5c02\u7528<\/strong> \u53d6\u5f15\u91cf\u3001\u30d6\u30e9\u30f3\u30c9\u30ea\u30b9\u30af\u3001\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306b\u3088\u3063\u3066\u660e\u78ba\u306a\u5236\u9650\u304c\u8a2d\u5b9a\u3055\u308c\u308b\u3068\u3001\u3059\u3050\u306bIP\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u79c1\u81ea\u8eab\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u30d1\u30bf\u30fc\u30f3\u3001\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u3001\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u306e\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7\u306e\u30b9\u30d4\u30fc\u30c9\u3092\u6c7a\u3081\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u500b\u5225\u306b\u30c6\u30b9\u30c8\u3057\u3001\u914d\u4fe1\u7d4c\u8def\u3092\u660e\u78ba\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u554f\u984c\u3092\u3088\u308a\u8fc5\u901f\u306b\u5207\u308a\u5206\u3051\u3001\u8996\u8a8d\u6027\u306e\u9ad8\u3044\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3092\u5b88\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e88\u6e2c\u53ef\u80fd\u306a\u53d7\u4fe1\u62d2\u5426\u7387\u3092\u304a\u671b\u307f\u3067\u3042\u308c\u3070\u3001\u500b\u5225\u306e\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u6295\u8cc7\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <strong>\u30cd\u30c3\u30c4<\/strong> \u305d\u3057\u3066\u6e05\u6f54\u306a\u30a2\u30c9\u30ec\u30b9\u885b\u751f\u3002.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30a2\u30b9\u30da\u30af\u30c8<\/th>\n      <th>\u5171\u6709IP<\/th>\n      <th>\u5c02\u7528IP<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u7acb\u3061\u4e0a\u3052\u8cbb\u7528<\/td>\n      <td>\u307b\u3068\u3093\u3069\u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7\u306a\u3057<\/td>\n      <td>\u8a08\u753b\u7684\u306a\u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7\u304c\u5fc5\u8981<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/td>\n      <td>\u9650\u5b9a\u7684\u3001\u5171\u540c\u5229\u7528\u8005\u306b\u3088\u308b\u30ea\u30b9\u30af<\/td>\n      <td>\u5b8c\u5168\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30ea\u30b9\u30af\u30fb\u30a8\u30af\u30b9\u30dd\u30fc\u30b8\u30e3\u30fc<\/td>\n      <td>\u82e6\u60c5\u306b\u5bfe\u3059\u308b\u30d7\u30fc\u30eb\u5168\u4f53\u306e\u52b9\u679c<\/td>\n      <td>\u81ea\u5206\u306e\u8a3a\u7642\u6240\u306b\u9589\u3058\u3053\u3082\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/td>\n      <td>\u30d7\u30fc\u30eb\u306e\u30eb\u30fc\u30eb\u306b\u3088\u3063\u3066\u5236\u9650\u3055\u308c\u308b<\/td>\n      <td>IP\/\u30c9\u30e1\u30a4\u30f3\u69cb\u9020\u3067\u8a08\u753b\u53ef\u80fd<\/td>\n    <\/tr>\n    <tr>\n      <td>\u4ee3\u8868\u7684\u306a\u4f7f\u7528\u4f8b<\/td>\n      <td>\u5c11\u91cf\u751f\u7523\u3001\u4e88\u7b97\u91cd\u8996<\/td>\n      <td>\u5927\u91cf\u751f\u7523\u3001\u30d6\u30e9\u30f3\u30c9\u4fdd\u8b77<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2>\u30c9\u30e1\u30a4\u30f3\u306e\u6e29\u6696\u5316\uff1a\u614e\u91cd\u306b\u65b0\u3057\u3044\u9001\u4fe1\u8005ID\u3092\u78ba\u7acb\u3059\u308b<\/h2>\n\n<p>IP\u3092\u6e29\u3081\u308b\u3060\u3051\u3067\u306a\u304f <strong>\u30c9\u30e1\u30a4\u30f3<\/strong> \u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u79c1\u306f\u307e\u305a\u3001\u660e\u78ba\u306a\u671f\u5f85\u3092\u6301\u3064\u975e\u5e38\u306b\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30b3\u30f3\u30bf\u30af\u30c8\u306b\u306e\u307f\u3001\u65b0\u898f\u307e\u305f\u306f\u672a\u4f7f\u7528\u306e\u9001\u4fe1\u8005\u30c9\u30e1\u30a4\u30f3\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u4fe1\u983c\u95a2\u4fc2\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u53d6\u5f15\uff08\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u66f4\u65b0\u306a\u3069\uff09\u304b\u3089\u59cb\u3081\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5b89\u5b9a\u3057\u3066\u304b\u3089\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u91cf\u3092\u5897\u3084\u3057\u307e\u3059\u3002\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u6d41\u308c\u3092\u5206\u3051\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002.<em>\u30c9\u30e1\u30a4\u30f3\u30c8\u30fc\u30eb\u30c9<\/em> \u305d\u3057\u3066\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3002.<em>\u30c9\u30e1\u30a4\u30f3\u30c8\u30fc\u30eb\u30c9<\/em> \u306f\u3001\u3088\u308a\u7ba1\u7406\u3057\u3084\u3059\u3044\u72ec\u81ea\u306e\u5c65\u6b74\u3092\u4f5c\u6210\u3059\u308b\u3002\u53e4\u3044\u3001\u4fe1\u983c\u3067\u304d\u308b\u9001\u4fe1\u8005\u540d\u3068\u4e00\u8cab\u6027\u306e\u3042\u308bFrom\u30d8\u30c3\u30c0\u30fc\u306f\u3001\u300c\u65b0\u3057\u3044\u672a\u77e5\u306e\u3082\u306e\u300d\u3068\u3057\u3066\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u308b\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3059\u308b\u3002.<\/p>\n\n<h2>IP\u6e29\u6696\u5316\uff1a\u30af\u30ea\u30fc\u30f3\u306a\u91cf\u7684\u6210\u9577\u3078\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/h2>\n\n<p>\u3092\u59cb\u3081\u308b\u3002 <strong>\u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7<\/strong> \u30aa\u30fc\u30d7\u30f3\u3084\u30af\u30ea\u30c3\u30af\u304c\u30dd\u30b8\u30c6\u30a3\u30d6\u306a\u30b7\u30b0\u30ca\u30eb\u3092\u9001\u308b\u3088\u3046\u306b\u3001\u6700\u3082\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u78ba\u8a8d\u3055\u308c\u305f\u30b3\u30f3\u30bf\u30af\u30c8\u3092\u4f7f\u3046\u3002\u9031\u76ee\u306f\u30011\u65e5\u306e\u30dc\u30ea\u30e5\u30fc\u30e0\u3092\u6291\u3048\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3054\u3068\u306b\u9069\u5ea6\u306b\u5897\u3084\u3057\u3001\u30d0\u30a6\u30f3\u30b9\u3092\u7d30\u304b\u304f\u30e2\u30cb\u30bf\u30fc\u3059\u308b\u3002\u524d\u65e5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u307e\u3060\u4f4e\u3044\u5834\u5408\u306f\u30012\u500d\u4ee5\u4e0a\u306e\u30b8\u30e3\u30f3\u30d7\u306f\u907f\u3051\u308b\u3002\u30d5\u30a3\u30eb\u30bf\u30fc\u304c\u5b89\u5b9a\u3057\u305f\u30d1\u30bf\u30fc\u30f3\u3092\u5b66\u7fd2\u3059\u308b\u3088\u3046\u306b\u3001\u4ef6\u540d\u3068\u5185\u5bb9\u306f\u4e00\u5b9a\u306b\u4fdd\u3064\u3002\u30b9\u30d1\u30e0\u306e\u82e6\u60c5\u306b\u95a2\u3059\u308b\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u304c\u3042\u3063\u305f\u5834\u5408\u306f\u3001\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u4e00\u6642\u505c\u6b62\u3057\u3001\u975e\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u3082\u306e\u3092\u524a\u9664\u3057\u3066 <strong>\u30c9\u30e1\u30a4\u30f3<\/strong>-\u8a55\u5224.<\/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\/02\/email-hosting-infra-3351.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30b9\u30d1\u30e0\u30d5\u30a3\u30eb\u30bf\u306e\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3068\u30ea\u30b9\u30c8\u306e\u885b\u751f\u7ba1\u7406<\/h2>\n\n<p>\u983c\u308a\u306b\u3057\u3066\u3044\u308b\u306e\u306f <strong>\u30b9\u30d1\u30e0\u30d5\u30a3\u30eb\u30bf<\/strong>-\u65b0\u3057\u3044\u30ea\u30b9\u30c8\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u6a5f\u80fd\u306f\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u3092\u59a8\u3052\u308b\u3053\u3068\u306a\u304f\u3001\u30b0\u30ec\u30a4\u30ea\u30b9\u30c8\u3001\u30d8\u30c3\u30c0\u30fc\u5206\u6790\u3001\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u30c1\u30a7\u30c3\u30af\u3092\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u3002\u81ea\u52d5\u30ea\u30b9\u30c8\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306f\u3001\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30b5\u30fc\u3001\u9577\u671f\u4e0d\u5728\u8005\u3001\u4e0d\u6b63\u306a\u69cb\u6587\u3092\u53d6\u308a\u9664\u304d\u307e\u3059\u3002\u660e\u78ba\u306a\u30aa\u30d7\u30c8\u30a4\u30f3\u3001\u8fc5\u901f\u306a\u914d\u4fe1\u505c\u6b62\u3001\u308f\u304b\u308a\u3084\u3059\u3044\u9001\u4fe1\u8005ID\u3067\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u30eb\u30fc\u30d7\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002IP\u3092\u5171\u6709\u3059\u308b\u4eba\u306f <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%81%aeip%e3%81%8c%e3%83%96%e3%83%a9%e3%83%83%e3%82%af%e3%83%aa%e3%82%b9%e3%83%88%e3%81%aemailfix%e3%81%a7%e4%b8%80%e7%b7%92%e3%81%ab%e3%81%aa\/\">\u5171\u6709\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8<\/a> \u3092\u4f5c\u6210\u3057\u3001\u304b\u3055\u3070\u308b\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u7a4d\u6975\u7684\u306b\u9664\u5916\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a <strong>\u54c1\u8cea<\/strong> \u6d77\u904b\u4f1a\u793e\u306e\u696d\u7e3e\u306f\u5e38\u306b\u9ad8\u3044\u3002.<\/p>\n\n<h2>\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u671f\u5f85<\/h2>\n\n<p>\u79c1\u306f\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3084\u8aad\u8005\u304c\u30e1\u30fc\u30eb\u3092\u660e\u78ba\u306b\u5206\u985e\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u30e1\u30fc\u30eb\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3057\u3066\u3044\u307e\u3059\uff1a\u660e\u78ba\u306a\u30d7\u30ec\u30d8\u30c3\u30c0\u30fc\u3001\u4e00\u8cab\u6027\u306e\u3042\u308b\u9001\u4fe1\u8005\u540d\u3001\u30c8\u30ea\u30ac\u30fc\u30ef\u30fc\u30c9\u306e\u306a\u3044\u9069\u5207\u306a\u4ef6\u540d\u3002\u30d0\u30e9\u30f3\u30b9\u306e\u3068\u308c\u305f <strong>\u30c6\u30ad\u30b9\u30c8\u3068\u753b\u50cf\u306e\u6bd4\u7387<\/strong>, Alt\u30c6\u30ad\u30b9\u30c8\u3068\u30af\u30ea\u30fc\u30f3\u306aHTML\u69cb\u9020\u306f\u3001\u53b3\u5bc6\u306a\u30d5\u30a3\u30eb\u30bf\u30fc\u3068\u5f31\u3044\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u74b0\u5883\u3067\u5805\u7262\u6027\u3092\u9ad8\u3081\u308b\u3002\u30ea\u30f3\u30af\u306e\u8a55\u4fa1\u3092\u4e0b\u3052\u306a\u3044\u305f\u3081\u306b\u3001URL\u77ed\u7e2e\u3001\u4e0d\u5fc5\u8981\u306a\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3001\u591a\u304f\u306e\u5916\u90e8\u30c9\u30e1\u30a4\u30f3\u306e\u6df7\u5728\u306f\u907f\u3051\u308b\u3002\u8aad\u307f\u3084\u3059\u3044\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u3068\u5b89\u5b9a\u3057\u305f <strong>\u30e1\u30c3\u30bb\u30fc\u30b8ID<\/strong> 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<strong>\u30b5\u30f3\u30bb\u30c3\u30c8\u30fb\u30dd\u30ea\u30b7\u30fc<\/strong> \u904e\u5270\u306a\u63a5\u89e6\u3092\u9632\u304e\u3001\u9ad8\u3044\u30ec\u30d9\u30eb\u306e\u30b3\u30df\u30c3\u30c8\u30e1\u30f3\u30c8\u3092\u7dad\u6301\u3059\u308b\u3002.<\/p>\n\n<h2>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\uff1a\u30dd\u30b9\u30c8\u30de\u30b9\u30bf\u30fc\u30c7\u30fc\u30bf\u3001FBL\u3001\u30d0\u30a6\u30f3\u30b9\u30b3\u30fc\u30c9\u306e\u5206\u6790<\/h2>\n\n<p>\u79c1\u306e\u4fa1\u5024 <strong>\u30dd\u30b9\u30c8\u30de\u30b9\u30bf\u30fc<\/strong>-\u30e1\u30c8\u30ea\u30c3\u30af\u30b9\u3001\u30b9\u30d1\u30e0\u7387\u3001\u30b8\u30e3\u30f3\u30af\u30e0\u30fc\u30d6\u7387\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3054\u3068\u306eIP\/\u30c9\u30e1\u30a4\u30f3\u30b9\u30b3\u30a2\u3002\u30bd\u30d5\u30c8\u30d0\u30a6\u30f3\u30b9\u3068\u30cf\u30fc\u30c9\u30d0\u30a6\u30f3\u30b9\u3092\u304d\u308c\u3044\u306b\u5206\u985e\u3057\u3001\u901f\u5ea6\u3092\u8abf\u6574\u3057\u3001\u30ad\u30e5\u30fc\u3092\u5c0f\u3055\u304f\u4fdd\u3061\u307e\u3059\u3002FBL\u306e\u30c7\u30fc\u30bf\u306f\u30b5\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u30ea\u30b9\u30c8\u306b\u6d41\u308c\u8fbc\u307f\u3001\u82e6\u60c5\u304c\u7e70\u308a\u8fd4\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u6280\u8853\u7684\u306a\u5f71\u97ff\u3068\u7de8\u96c6\u4e0a\u306e\u5f71\u97ff\u3092\u5206\u3051\u308b\u305f\u3081\u3001\u914d\u4fe1\u7d4c\u8def\u3068\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u5225\u3005\u306b\u30c6\u30b9\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u65e9\u3044\u6bb5\u968e\u3067\u50be\u5411\u3092\u628a\u63e1\u3057 <strong>\u53d7\u4fe1\u30c8\u30ec\u30a4<\/strong>-\u30ce\u30eb\u30de\u306f\u8a08\u7b97\u3067\u304d\u308b\u3002.<\/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\/02\/email_hosting_infra_9342.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30c9\u30e1\u30a4\u30f3\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u30b7\u30b0\u30ca\u30eb\u3092\u6226\u7565\u7684\u306b\u5f37\u5316<\/h2>\n\n<p>\u306e\u4e16\u8a71\u3092\u3057\u3066\u3044\u308b\u3002 <strong>\u30c9\u30e1\u30a4\u30f3<\/strong>-\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u4ecb\u3057\u3066\u53d6\u5f15\u3068\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306e\u6d41\u308c\u306b\u5206\u96e2\u3055\u308c\u305f\u8a55\u5224\u3002\u9ad8\u3044\u958b\u5c01\u7387\u3068\u30af\u30ea\u30c3\u30af\u6570\u306f\u4fe1\u983c\u306e\u30a2\u30f3\u30ab\u30fc\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u305f\u3081\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u30b0\u30eb\u30fc\u30d7\u306e\u7ba1\u7406\u304c\u512a\u5148\u3055\u308c\u308b\u3002\u660e\u78ba\u306a\u540c\u610f\u3001\u30c0\u30d6\u30eb\u30aa\u30d7\u30c8\u30a4\u30f3\u3001\u900f\u660e\u6027\u306e\u3042\u308b\u671f\u5f85\u5024\u7ba1\u7406\u306e\u305f\u3081\u306b\u30ea\u30b9\u30c8\u69cb\u7bc9\u3092\u6574\u3048\u308b\u3002\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u9069\u5207\u306a\u307e\u307e\u3067\u3042\u308a\u3001\u9001\u4fe1\u8005\u540d\u3068\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u306f\u660e\u78ba\u3067\u5b89\u5b9a\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u8a8d\u77e5\u5ea6\u304c\u5411\u4e0a\u3057 <strong>\u30d6\u30e9\u30f3\u30c9<\/strong> \u306f\u6c38\u4e45\u7684\u306a\u4fe1\u7528\u3092\u5f97\u308b\u3002.<\/p>\n\n<h2>\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u7279\u6709\u306e\u5fae\u5999\u306a\u70b9\u3092\u8003\u616e\u3059\u308b<\/h2>\n\n<p>\u79c1\u306f\u30af\u30ed\u30c3\u30af\u3068\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u5927\u898f\u6a21\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u7279\u6b8a\u6027\u306b\u9069\u5fdc\u3055\u305b\u308b\u3002. <strong>Gmail<\/strong> \u82e6\u60c5\u3068\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u306b\u654f\u611f\u306b\u53cd\u5fdc\u3059\u308b\u3002\u5b89\u5b9a\u3057\u305f\u8ca9\u58f2\u91cf\u3068\u9ad8\u3044\u30a4\u30f3\u30bf\u30e9\u30af\u30b7\u30e7\u30f3\u7387\u304c\u3001\u3053\u3053\u3067\u306e\u6700\u3082\u91cd\u8981\u306a\u30ec\u30d0\u30fc\u3067\u3042\u308b\u3002. <strong>\u30de\u30a4\u30af\u30ed\u30bd\u30d5\u30c8<\/strong>-\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\uff08Outlook\/Hotmail\uff09\u306f\u53b3\u683c\u306a\u30d0\u30a6\u30f3\u30b9\u51e6\u7406\u3092\u5fc5\u8981\u3068\u3057\u3001\u30dc\u30ea\u30e5\u30fc\u30e0\u306e\u30b8\u30e3\u30f3\u30d7\u306b\u306f\u307b\u3068\u3093\u3069\u8010\u6027\u304c\u306a\u3044\u3002. <strong>\u30e4\u30d5\u30fc\/AOL<\/strong> \u660e\u78ba\u306a\u30aa\u30d7\u30c8\u30a4\u30f3\u3092\u4fc3\u9032\u3057\u3001\u653b\u6483\u7684\u306a\u983b\u5ea6\u306b\u306f\u30da\u30ca\u30eb\u30c6\u30a3\u3092\u8ab2\u3059\u3002. <strong>GMX\/WEB.DE<\/strong> rDNS\u3001FCrDNS\u3001\u30af\u30ea\u30fc\u30f3\u306aHELO\u6587\u5b57\u5217\u306b\u7d30\u5fc3\u306e\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u3002. <strong>\u30a2\u30c3\u30d7\u30ebiCloud<\/strong> \u306f\u3001\u672a\u77e5\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u4fe1\u983c\u3067\u304d\u308bTLS\u63a5\u7d9a\u3092\u53b3\u5bc6\u306b\u63a8\u5b9a\u3057\u307e\u3059\u3002\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u8a2d\u5b9a\u3092\u5f37\u5236\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3054\u3068\u306b\u30ea\u30df\u30c3\u30c8\u3001\u30ea\u30c8\u30e9\u30a4\u30d0\u30c3\u30af\u30aa\u30d5\u3001\u4e26\u5217\u63a5\u7d9a\u3092\u8abf\u6574\u3059\u308b\u3002.<\/p>\n\n<h2>\u30a4\u30f3\u30d5\u30e9\uff1arDNS\u3001FCrDNS\u3001TLS\u3001\u30ad\u30e5\u30fc\u7ba1\u7406\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b\u3002<\/h2>\n\n<p>\u3092\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3057\u305f\u3002 <strong>rDNS<\/strong> \u3092\u30db\u30b9\u30c8\u540d\u3068IP\u540d\u306b\u660e\u78ba\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3001\u9006\u5f15\u304d\u89e3\u6c7a\u3068\u9806\u65b9\u5411\u89e3\u6c7a\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3061\u307e\u3059\u3002FCrDNS\u306f\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3084\u30df\u30b9\u30de\u30c3\u30c1\u306e\u306a\u3044\u660e\u78ba\u306a\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u3057\u307e\u3059\u3002MTA\u306f\u63a5\u7d9a\u3092\u52b9\u7387\u7684\u306b\u4fdd\u3061\u3001\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3054\u3068\u306e\u5236\u9650\u3092\u5c0a\u91cd\u3057\u3001\u5b9f\u7e3e\u306e\u3042\u308b\u30d1\u30b9\u3092\u512a\u5148\u3057\u307e\u3059\u3002TLS\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u6697\u53f7\u3092\u6700\u65b0\u306e\u72b6\u614b\u306b\u4fdd\u3061\u3001OCSP\u30b9\u30c6\u30fc\u30d7\u30ea\u30f3\u30b0\u3068\u8a3c\u660e\u66f8\u3092\u5468\u671f\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u3001ID\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u52d5\u4f5c\u304c\u4e00\u8cab\u3057\u305f\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002 <strong>\u30d5\u30a3\u30eb\u30bf\u30fc<\/strong> \u7a4d\u6975\u7684\u3060\u3002.<\/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\/02\/developerdesk4812.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u57fa\u6e96\u3068\u4fe1\u983c\u30e1\u30ab\u30cb\u30ba\u30e0<\/h2>\n\n<p>\u79c1\u306fTLS\u3092\u6b21\u306e\u3088\u3046\u306b\u88dc\u5b8c\u3057\u3066\u3044\u308b\u3002 <strong>MTA-STS<\/strong> \u305d\u3057\u3066 <strong>TLS-RPT<\/strong>, \u5b89\u5168\u306a\u8f38\u9001\u3092\u7dad\u6301\u3057\u3001\u30a8\u30e9\u30fc\u306e\u5831\u544a\u3092\u53d7\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u3002\u53ef\u80fd\u306a\u9650\u308a <strong>DANE<\/strong> \u3054\u90fd\u5408\u4e3b\u7fa9\u3092\u907f\u3051\u308b\u305f\u3081\u306bTLSA\u30ec\u30b3\u30fc\u30c9\u3092\u7d4c\u7531\u3059\u308b\u3002\u8996\u899a\u7684\u306a\u30c8\u30e9\u30b9\u30c8\u30fb\u30a2\u30f3\u30ab\u30fc\u3068\u3057\u3066\u306f <strong>BIMI<\/strong> \u5fc5\u8981\u3067\u3042\u308c\u3070\u3001\u30d6\u30e9\u30f3\u30c9\u3092\u76ee\u306b\u898b\u3048\u308b\u5f62\u3067\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306bVMC\u8a3c\u660e\u66f8\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002. <strong>\u30a2\u30fc\u30af<\/strong> \u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u30fb\u30c1\u30a7\u30fc\u30f3\u306e\u914d\u9001\u3092\u5b89\u5b9a\u3055\u305b\u308b <strong>\u30a8\u30b9\u30a2\u30fc\u30eb\u30a8\u30b9<\/strong> \u8ee2\u9001\u4e2d\u306bSPF\u304c\u58ca\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u307e\u305f <strong>\u30a2\u30a4\u30d4\u30fc\u30d6\u30a4\u30b7\u30c3\u30af\u30b9<\/strong>-\u30d7\u30ed\u30d3\u30b8\u30e7\u30cb\u30f3\u30b0\u306b\u3088\u308a\u3001\u6700\u65b0\u306e\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u5b89\u5fc3\u3057\u3066\u30c7\u30e5\u30a2\u30eb\u30b9\u30bf\u30c3\u30af\u30fb\u30d1\u30b9\u3092\u53d7\u3051\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n<h2>\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u9078\u629e\u3068\u30b3\u30b9\u30c8\uff1a\u30d7\u30fc\u30eb\u3001\u72ec\u81ea\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3001\u4e88\u7b97<\/h2>\n\n<p>\u3092\u9078\u3076\u3002 <strong>\u30d7\u30ed\u30d0\u30a4\u30c0<\/strong> IP\u306e\u54c1\u8cea\u3001\u30d7\u30fc\u30eb\u306e\u30b5\u30a4\u30ba\u3001\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u306e\u5c65\u6b74\u3001\u5236\u9650\u306e\u900f\u660e\u6027\u306b\u3088\u308a\u307e\u3059\u3002\u5171\u6709\u30d1\u30c3\u30b1\u30fc\u30b8\u306f\u3001\u885b\u751f\u72b6\u614b\u304c\u9069\u5207\u3067\u3042\u308b\u9650\u308a\u3001\u5c11\u91cf\u3067\u3042\u308c\u3070\u5341\u5206\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u6708\u984d5\uff5e15\u30e6\u30fc\u30ed\u3067\u3059\u3002\u5c02\u7528\u30a2\u30c9\u30ec\u30b9\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u3001\u76e3\u8996\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001IP\u3042\u305f\u308a\u6708\u984d30\uff5e120\u30e6\u30fc\u30ed\u3068\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3092\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002SLA\u3001\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u30fb\u30d1\u30b9\u3001\u30c6\u30b9\u30c8\u74b0\u5883\u306b\u3064\u3044\u3066\u306f\u3001\u672c\u756a\u524d\u306b\u5165\u5ff5\u306b\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u3088\u308a\u8a73\u7d30\u306a\u6982\u8981\u306b\u3064\u3044\u3066\u306f\u3001\u79c1\u306f\u30b3\u30f3\u30d1\u30af\u30c8\u306a <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%ac%e3%82%a4%e3%83%89-%e3%82%b9%e3%83%91%e3%83%a0-%e8%a9%95%e5%88%a4-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e5%8a%b9%e6%9e%9c-%e3%83%96\/\">\u8a55\u5224\u30ac\u30a4\u30c9<\/a>, \u30ea\u30b9\u30af\u3068\u4e88\u7b97\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u660e\u78ba\u306b\u3059\u308b\u3002.<\/p>\n\n<h2>\u696d\u52d9\u30d7\u30ed\u30bb\u30b9\u3001\u4e0a\u5834\u5ec3\u6b62\u3001\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3<\/h2>\n\n<p>\u79c1\u306f <strong>\u30e9\u30f3\u30d6\u30c3\u30af<\/strong> \u521d\u671f\u30bd\u30d5\u30c8\u30d6\u30ed\u30c3\u30af(421\/451)\u304b\u3089\u3001\u4e00\u6642\u7684\u306a\u30b9\u30ed\u30c3\u30c8\u30ea\u30f3\u30b0\u3001\u30cf\u30fc\u30c9\u30d6\u30ed\u30c3\u30af(5xx)\u3001\u69cb\u9020\u5316\u3055\u308c\u305f\u30ea\u30b9\u30c8\u89e3\u9664\u307e\u3067\u3002\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u5206\u6790\u3057\u3001\u30d1\u30bf\u30fc\u30f3\uff08\u4f8b\uff1a5.7.1 Policy Reject\uff09\u3092\u7279\u5b9a\u3057\u3001\u5bfe\u7b56\u3092\u6587\u66f8\u5316\u3057\u307e\u3059\uff1a\u30ea\u30b9\u30c8\u306e\u30af\u30ec\u30f3\u30b8\u30f3\u30b0\u3001\u983b\u5ea6\u306e\u8abf\u6574\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u30c1\u30a7\u30c3\u30af\u3001DNS\u306e\u4fee\u6b63\u3002\u30b9\u30b3\u30fc\u30d7\uff08DNSBL\u5bfe\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u5185\u90e8\u30ea\u30b9\u30c8\uff09\u306b\u5fdc\u3058\u3066\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u533a\u5225\u3057\u3001\u539f\u56e0\u304c\u660e\u3089\u304b\u306b\u662f\u6b63\u3055\u308c\u305f\u5834\u5408\u306b\u306e\u307f\u6a19\u7684\u578b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u767a\u52d5\u3059\u308b\u3002\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u3059\u3079\u3066\u6587\u66f8\u5316\u3057\u3001\u518d\u767a\u6642\u306b\u6a19\u6e96\u5316\u3055\u308c\u305f\u624b\u9806\u3067\u8fc5\u901f\u306b\u7d50\u679c\u3092\u51fa\u3059\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u3001\u540c\u610f\u3001\u30c7\u30fc\u30bf\u885b\u751f<\/h2>\n\n<p>\u79c1\u306f\u78ba\u4fdd\u3059\u308b <strong>\u540c\u610f\u66f8<\/strong> \u30af\u30ea\u30fc\u30f3\u3067\uff08\u30c0\u30d6\u30eb\u30aa\u30d7\u30c8\u30a4\u30f3\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001\u30bd\u30fc\u30b9\uff09\u3001\u5730\u57df\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u5c0a\u91cd\u3057\u3066\u3044\u307e\u3059\u3002\u5f79\u5272\u30a2\u30c9\u30ec\u30b9\u3001\u30ad\u30e3\u30c3\u30c1\u30aa\u30fc\u30eb\u30c9\u30e1\u30a4\u30f3\u3001\u53e4\u3044\u5728\u5eab\u3092\u63a7\u3048\u3081\u306b\u6271\u3044\u3001\u30b9\u30d1\u30e0\u30c8\u30e9\u30c3\u30d7\u306e\u30ea\u30b9\u30af\u3092\u56de\u907f\u3057\u307e\u3059\u3002\u500b\u4eba\u60c5\u5831\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u6291\u5236\u30ea\u30b9\u30c8\u3092\u5206\u96e2\u3057\u3001\u660e\u78ba\u306a\u30eb\u30fc\u30eb\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002 <strong>\u900f\u660e\u6027<\/strong> \u9001\u4fe1\u8005\u3001\u76ee\u7684\u3001\u9023\u7d61\u983b\u5ea6\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306f\u6cd5\u7684\u306a\u78ba\u5b9f\u6027\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u914d\u4fe1\u53ef\u80fd\u6027\u3084\u30d6\u30e9\u30f3\u30c9\u306e\u4fe1\u983c\u6027\u306b\u3082\u76f4\u7d50\u3059\u308b\u3002.<\/p>\n\n<h2>\u7d99\u7d9a\u7684\u7ba1\u7406\u306e\u305f\u3081\u306e\u4e3b\u8981\u6570\u5024\u3068\u76ee\u6a19\u5024<\/h2>\n\n<p>\u79c1\u306f\u3001\u660e\u78ba\u306a\u76ee\u6a19\u30b3\u30ea\u30c9\u30fc\u3068\u691c\u8a3c\u53ef\u80fd\u306a\u95be\u5024\u3067\u30c7\u30ea\u30d0\u30ea\u30fc\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\uff1a<\/p>\n<ul>\n  <li><strong>\u30af\u30ec\u30fc\u30e0\u7387<\/strong>: &lt; 0.1 %\/\u6d3e\u9063\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3002.<\/li>\n  <li><strong>\u30cf\u30fc\u30c9\u30fb\u30d0\u30a6\u30f3\u30b9\u7387<\/strong>: &lt; 0.5-1.0 %;\u672a\u77e5\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u65e9\u671f\u306b\u9078\u5225\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30b9\u30d1\u30e0\u30c8\u30e9\u30c3\u30d7\u306e\u30d2\u30f3\u30c8<\/strong>\u3059\u3050\u306b\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u4e00\u6642\u505c\u6b62\u3059\u308b\u3002.<\/li>\n  <li><strong>\u958b\u5c01\u7387\uff0f\u30af\u30ea\u30c3\u30af\u7387<\/strong>\u30b9\u30c8\u30ea\u30fc\u30e0\u3054\u3068\u306e\u5b89\u5b9a\u6027\u3002\u751f\u306e\u5024\u3088\u308a\u3082\u30c8\u30ec\u30f3\u30c9\u306e\u65b9\u304c\u91cd\u8981\u3002.<\/li>\n  <li><strong>\u636e\u7f6e\u7387<\/strong>\u30a6\u30a9\u30fc\u30e0\u30a2\u30c3\u30d7\u3067\u30b7\u30f3\u30ad\u30f3\u30b0\u3002\u30d0\u30c3\u30af\u30aa\u30d5\u3067\u30ea\u30c8\u30e9\u30a4\u3002.<\/li>\n  <li><strong>TLS\u30ab\u30d0\u30ec\u30c3\u30b8<\/strong>\u53ef\u80fd\u3067\u3042\u308c\u3070\u3001StartTLS\u3067%\u309295\u56de\u6210\u529f\u3055\u305b\u308b\u3002.<\/li>\n<\/ul>\n<p>\u3082\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u3002 <strong>\u53d7\u4fe1\u6642\u9593<\/strong>, \u30ad\u30e5\u30fc\u5185\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3084\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u9650\u754c\u3092\u65e9\u3044\u6bb5\u968e\u3067\u8a8d\u8b58\u3059\u308b\u305f\u3081\u3060\u3002\u79c1\u306f\u30b7\u30fc\u30c9\u30c6\u30b9\u30c8\u3092\u88dc\u8db3\u3068\u3057\u3066\u306e\u307f\u4f7f\u7528\u3057\u3001\u5b9f\u969b\u306e\u30ec\u30b7\u30fc\u30d0\u30fc\u30fb\u30bb\u30b0\u30e1\u30f3\u30c8\u306f\u3088\u308a\u95a2\u9023\u6027\u306e\u9ad8\u3044\u30b7\u30b0\u30ca\u30eb\u3092\u63d0\u4f9b\u3059\u308b\u3002\u767a\u898b\u3092\u6052\u4e45\u7684\u306a\u3082\u306e\u306b\u5909\u63db\u3059\u308b <strong>\u6291\u5236\u306e\u8ad6\u7406<\/strong> \u305d\u3057\u3066\u3001\u5b66\u7fd2\u306e\u6210\u529f\u304c\u6c38\u7d9a\u7684\u306a\u52b9\u679c\u3092\u3082\u305f\u3089\u3059\u3088\u3046\u306b\u3001\u30eb\u30fc\u30eb\u3092\u7d30\u5206\u5316\u3059\u308b\u3002.<\/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\/02\/hosting-serverraum-8746.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u8981\u7d04\uff1a\u53d7\u4fe1\u30c8\u30ec\u30a4\u306e\u30ce\u30eb\u30de\u3092\u4e88\u6e2c\u901a\u308a\u306b\u5897\u3084\u3059<\/h2>\n\n<p>\u30b3\u30f3\u30d0\u30a4\u30f3 <strong>\u8a55\u5224<\/strong>, 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