{"id":12013,"date":"2025-08-12T08:35:40","date_gmt":"2025-08-12T06:35:40","guid":{"rendered":"https:\/\/webhosting.de\/email-header-analysieren-spamquellen-finden-workflow-schutzschild\/"},"modified":"2025-08-12T08:35:40","modified_gmt":"2025-08-12T06:35:40","slug":"%e9%9b%bb%e5%ad%90%e3%83%a1%e3%83%bc%e3%83%ab%e3%81%ae%e3%83%98%e3%83%83%e3%83%80%e3%83%bc%e3%82%92%e5%88%86%e6%9e%90%e3%81%97%e3%80%81%e3%82%b9%e3%83%91%e3%83%a0%e3%81%ae%e9%80%81%e4%bf%a1%e5%85%83","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/email-header-analysieren-spamquellen-finden-workflow-schutzschild\/","title":{"rendered":"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u5206\u6790\u30b9\u30d1\u30e0\u306e\u9001\u4fe1\u5143\u3092\u7d20\u65e9\u304f\u78ba\u5b9f\u306b\u898b\u3064\u3051\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>A <strong>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0<\/strong> \u306f\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u3084\u30dc\u30c3\u30c8\u30cd\u30c3\u30c8\u30b9\u30d1\u30e0\u3092\u3001\u958b\u5c01\u3055\u308c\u308b\u524d\u304b\u3089\u8a8d\u8b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u3092\u5206\u6790\u3059\u308b\u3053\u3068\u3067\u3001\u9001\u4fe1\u8005\u3001\u8a8d\u8a3c\u30c1\u30a7\u30c3\u30af\u3001\u914d\u9001\u30c1\u30a7\u30fc\u30f3\u3001\u64cd\u4f5c\u3092\u78ba\u5b9f\u306b\u8ffd\u8de1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n<ul>\n  <li><strong>\u30d8\u30c3\u30c0\u30fc\u60c5\u5831<\/strong> \u5404\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u767a\u4fe1\u5143\u3068\u914d\u9001\u306b\u95a2\u3059\u308b\u6280\u8853\u7684\u306a\u8a73\u7d30\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/li>\n  <li><strong>SPF\u3001DKIM<\/strong> \u3068DMARC\u306e\u5024\u306f\u3001\u30e1\u30fc\u30eb\u304c\u6b63\u5f53\u306a\u3082\u306e\u3067\u3042\u308b\u304b\u64cd\u4f5c\u3055\u308c\u305f\u3082\u306e\u3067\u3042\u308b\u304b\u3092\u793a\u3059\u3002<\/li>\n  <li><strong>\u30a2\u30a4\u30d4\u30fc\u30a2\u30c9\u30ec\u30b9<\/strong> \u3068Received\u884c\u306f\u3001\u30aa\u30ea\u30b8\u30f3\u30fb\u30b5\u30fc\u30d0\u30fc\u3092\u898b\u3064\u3051\u308b\u306e\u306b\u5f79\u7acb\u3064\u3002<\/li>\n  <li><strong>\u30c4\u30fc\u30eb<\/strong> \u30d8\u30c3\u30c0\u30fc\u89e3\u6790\u306f\u3001\u4e3b\u8981\u306a\u7279\u5fb4\u306e\u8a55\u4fa1\u3068\u8996\u899a\u5316\u3092\u5bb9\u6613\u306b\u3059\u308b\u3002<\/li>\n  <li><strong>\u30b9\u30d1\u30e0\u6307\u6a19<\/strong> X-Spam\u30b9\u30c6\u30fc\u30bf\u30b9\u3084BCL\u5024\u306a\u3069\u306f\u3001\u4e0d\u8981\u307e\u305f\u306f\u5371\u967a\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u793a\u3059\u3002<\/li>\n<\/ul>\n\n<h2>\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n<p>\u3059\u3079\u3066\u306eE\u30e1\u30fc\u30eb\u306b\u306f\u3001\u76ee\u306b\u898b\u3048\u308b\u30c6\u30ad\u30b9\u30c8\u306e\u307b\u304b\u306b\u3001\u76ee\u306b\u898b\u3048\u306a\u3044\u90e8\u5206\u3001\u3064\u307e\u308aE\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4e00\u884c\u3054\u3068\u306b\u4fdd\u5b58\u3055\u308c\u305f\u6280\u8853\u60c5\u5831\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u7d4c\u7531\u3067\u9001\u4fe1\u3055\u308c\u305f\u304b\u3001\u3044\u3064\u9001\u4fe1\u3055\u308c\u305f\u304b\u3001\u53d7\u4fe1\u8005\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u3069\u306e\u3088\u3046\u306b\u30c1\u30a7\u30c3\u30af\u3057\u305f\u304b\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u8a8d\u8a3c\u7d50\u679c\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u60c5\u5831\u3082\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u5b8c\u5168\u306a\u30d8\u30c3\u30c0\u30fc\u306f\u901a\u5e38\u3001\u6700\u521d\u306e <strong>\u53d7\u9818<\/strong>-line - \u3053\u308c\u306f\u3001\u914d\u4fe1\u30c1\u30a7\u30fc\u30f3\u306e\u5404\u30ce\u30fc\u30c9\u3092\u6642\u7cfb\u5217\u306b\u8a18\u9332\u3059\u308b\u3002\u65e9\u304f\u8868\u793a\u3055\u308c\u308b\u307b\u3069\u3001\u5143\u306e\u30bd\u30fc\u30b9\u306b\u8fd1\u3044\u3002\u307e\u305f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30c7\u30fc\u30bf\u3082\u3042\u308b\u3002 <strong>\u30ea\u30bf\u30fc\u30f3\u30d1\u30b9<\/strong>, <strong>\u30e1\u30c3\u30bb\u30fc\u30b8ID<\/strong>, <strong>\u8a8d\u8a3c\u7d50\u679c<\/strong> \u6216\u3044\u306f <strong>X-\u30b9\u30d1\u30e0\u72b6\u6cc1<\/strong>.<\/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\/2025\/08\/email-header-analyse-6371.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u9023\u3059\u308b\u30d8\u30c3\u30c0\u30fc\u30fb\u30d5\u30a3\u30fc\u30eb\u30c9<\/h2>\n<p>\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u5143\u3092\u7279\u5b9a\u3057\u305f\u3044\u5834\u5408\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u3044\u304f\u3064\u304b\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u7279\u306b\u5f79\u306b\u7acb\u3061\u307e\u3059\u3002\u3053\u308c\u3089\u306b\u306f\u5b8c\u5168\u306a <strong>\u53d7\u3051\u53d6\u3063\u305f\u30c1\u30a7\u30fc\u30f3<\/strong>\u306e\u3088\u3046\u306a\u5206\u91ce\u3082\u3042\u308b\u3002 <strong>\u8a8d\u8a3c\u7d50\u679c<\/strong> \u305d\u3057\u3066 <strong>X\u30d8\u30c3\u30c0\u30fc<\/strong>.<\/p>\n<p>SPF\u3001DKIM\u3001DMARC\u306e\u30c7\u30fc\u30bf\u3082\u30d8\u30c3\u30c0\u30fc\u3067\u9001\u4fe1\u3055\u308c\u308b\uff1a<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30d5\u30a3\u30fc\u30eb\u30c9<\/th>\n      <th>\u8aac\u660e<\/th>\n      <th>\u4f8b<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u8a8d\u8a3c\u7d50\u679c<\/td>\n      <td>\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u7d50\u679c<\/td>\n      <td>spf=pass; dkim=pass; dmarc=fail<\/td>\n    <\/tr>\n    <tr>\n      <td>\u53d7\u9818<\/td>\n      <td>SMTP\u30db\u30c3\u30d7\u306b\u3088\u308b\u53d7\u4fe1\u5c65\u6b74<\/td>\n      <td>from mail.example.com (IP) by mx.google.com<\/td>\n    <\/tr>\n    <tr>\n      <td>X-\u30b9\u30d1\u30e0\u72b6\u6cc1<\/td>\n      <td>\u30b9\u30d1\u30e0\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u30c1\u30a7\u30c3\u30af\u7d50\u679c<\/td>\n      <td>YES\u3001\u30b9\u30b3\u30a2=9.1 \u5fc5\u9808=5.0<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2>\u53d7\u4fe1\u56de\u7dda\u304b\u3089\u30b9\u30d1\u30e0\u767a\u4fe1\u5143\u3092\u7279\u5b9a<\/h2>\n<p>\u4edd <strong>\u53d7\u4fe1\u30e9\u30a4\u30f3<\/strong> \u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u3069\u306e\u30b5\u30fc\u30d0\u30fc\u5c40\u3092\u7d4c\u7531\u3057\u3066\u8ee2\u9001\u3055\u308c\u305f\u304b\u3092\u793a\u3059\u3002\u6700\u5f8c\u306eReceived\u884c\u306f\u5143\u306e\u30b5\u30fc\u30d0\u30fc\u3001\u3064\u307e\u308a\u672c\u5f53\u306e\u9001\u4fe1\u5143\u3092\u8868\u3059\u3002\u30b9\u30d1\u30e0\u9001\u4fe1\u8005\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u3084\u30eb\u30fc\u30d7\u3092\u64cd\u4f5c\u3057\u3066\u7d4c\u8def\u3092\u507d\u88c5\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/p>\n<p>\u307e\u305a\u3001\u53d7\u4fe1\u3057\u305f\u6700\u3082\u53e4\u3044\u884c\u3092\u8abf\u3079\u3001\u305d\u306e\u884c\u306b\u5909\u308f\u3063\u305fIP\u30a2\u30c9\u30ec\u30b9\u3001\u30b5\u30fc\u30d0\u30fc\u540d\u3001\u7570\u5e38\u306a\u6642\u9593\u306e\u305a\u308c\u304c\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u304b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002GeoIP\u30de\u30c3\u30d4\u30f3\u30b0\u3084DNS\u30ea\u30be\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u898b\u308b\u3053\u3068\u3067\u3001\u3053\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u3069\u3053\u306b\u3042\u308a\u3001\u6b63\u898f\u306e\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306b\u5c5e\u3057\u3066\u3044\u308b\u306e\u304b\u3001\u3042\u308b\u3044\u306f\u65e2\u77e5\u306e\u30b9\u30d1\u30e0\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u91cd\u8981\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u6bd4\u8f03\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%b9%e3%83%91%e3%83%a0%e3%83%8f%e3%82%a6%e3%82%b9%e3%83%bborg-%e3%82%ac%e3%82%a4%e3%83%89-%e3%82%b5%e3%83%bc%e3%83%93%e3%82%b9%e3%81%ae%e8%aa%ac%e6%98%8e%e3%81%aa%e3%81%a9%e3%82%92%e8%b3%bc\/\">\u30b9\u30d1\u30e0\u30cf\u30a6\u30b9<\/a>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/email-header-analyse-2934.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u64cd\u4f5c\u3055\u308c\u305f\u9001\u4fe1\u8005\u60c5\u5831\u306e\u8a8d\u8b58<\/h2>\n<p>\u30b9\u30d1\u30de\u30fc\u306f\u3001\u95b2\u89a7\u30a2\u30c9\u30ec\u30b9\uff08\"From:\"\uff09\u3084\u8fd4\u4fe1\u5148\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u30ea\u30bf\u30fc\u30f3\u30d1\u30b9\u3092\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u9001\u4fe1\u8005\u306f\u3001\u305d\u306e\u30e1\u30fc\u30eb\u304c\u4fe1\u983c\u3067\u304d\u308b\u30d1\u30fc\u30c8\u30ca\u30fc\u3084\u9867\u5ba2\u304b\u3089\u306e\u3082\u306e\u3060\u3068\u4fe1\u3058\u8fbc\u307e\u3055\u308c\u308b\u3002\u3057\u304b\u3057\u3001\u30d8\u30c3\u30c0\u30fc\u306f\u6280\u8853\u7684\u306b\u8cac\u4efb\u306e\u3042\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306b\u3064\u3044\u3066\u591a\u304f\u306e\u3053\u3068\u3092\u660e\u3089\u304b\u306b\u3057\u3066\u3044\u308b-\u3053\u3053\u306b\u306f\u77db\u76fe\u304c\u3042\u308b\u3002<\/p>\n<p>From:\u300d\u3068\u300cReturn-Path:\u300d\u304c\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u7591\u3046\u3079\u304d\u3067\u3042\u308b\u3002Reply-To\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5168\u304f\u7570\u306a\u308b\u30c9\u30e1\u30a4\u30f3\u306b\u8a98\u5c0e\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3082\u3001\u6b3a\u779e\u306e\u8a66\u307f\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30e1\u30fc\u30eb\u306e\u4e2d\u306b\u306f\u3001\u507d\u306eDKIM\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u3084\u6709\u52b9\u306a\u30c9\u30e1\u30a4\u30f3\u540d\u3068\u601d\u308f\u308c\u308b\u3082\u306e\u307e\u3067\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30d8\u30c3\u30c0\u30fc\u306b\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u7d4c\u7531\u3057\u305f\u5b9f\u969b\u306e\u30eb\u30fc\u30c8\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<h2>\u8a8d\u8a3c\u30c1\u30a7\u30c3\u30af\u3092\u8aad\u307f\u4e0a\u3052\u308b\uff1aSPF\u3001DKIM\u3001DMARC<\/h2>\n<p>\u306a\u308a\u3059\u307e\u3057\u3084\u30dc\u30c3\u30c8\u30e1\u30fc\u30eb\u304b\u3089\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u3001\u307b\u3068\u3093\u3069\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u8a8d\u8a3c\u624b\u7d9a\u304d\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u3089\u306f\u3001\u4f8b\u3048\u3070\u3001\u6a5f\u68b0\u304c\u8aad\u307f\u53d6\u308a\u53ef\u80fd\u306a\u30c1\u30a7\u30c3\u30af\u7d50\u679c\u3092\u751f\u6210\u3059\u308b\uff1a<\/p>\n<ul>\n  <li><strong>SPF\u3060\uff1a<\/strong> \u9001\u4fe1\u8005\u306f\u3053\u306eIP\u3092\u7d4c\u7531\u3057\u3066\u9001\u4fe1\u3059\u308b\u3053\u3068\u3092\u8a31\u53ef\u3055\u308c\u305f\u306e\u304b\uff1f<\/li>\n  <li><strong>DKIM\uff1a<\/strong> \u6697\u53f7\u30ad\u30fc\u306f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u3068\u4e00\u81f4\u3059\u308b\u304b\u3002<\/li>\n  <li><strong>DMARC\uff1a<\/strong> From\u30a2\u30c9\u30ec\u30b9\u3068\u8a8d\u8a3c\u306f\u4e00\u7dd2\u3067\u3059\u304b\uff1f<\/li>\n<\/ul>\n<p>\u3053\u306e\u60c5\u5831\u306f\u3001\"Authentication-Results: \"\u306e\u884c\u3067\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u591a\u304f\u306e\u5834\u5408\u3001SPF=pass\u3001dkim=fail\u307e\u305f\u306fdmarc=pass\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001DMARC\u304c\u5931\u6557\u3057\u3066\u3082\u30e1\u30fc\u30eb\u304c\u6b63\u3057\u304f\u898b\u3048\u308b\u5834\u5408\u3001\u30d8\u30c3\u30c0\u30fc\u3092\u3055\u3089\u306b\u5206\u6790\u3059\u308b\u304b\u3001\u8ffd\u52a0\u306eDNS\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u3079\u304d\u3067\u3042\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308bDMARC\u30ec\u30dd\u30fc\u30c8\u3092\u8a73\u3057\u304f\u898b\u308b\u3053\u3068\u306f\u7406\u306b\u304b\u306a\u3063\u3066\u3044\u308b\u3002 <a href=\"https:\/\/webhosting.de\/ja\/dmarc%e3%81%8c%e3%82%bb%e3%82%ad%e3%83%a5%e3%82%a2%e3%83%8d%e3%83%83%e3%83%88%e3%81%ae%e3%82%b9%e3%83%97%e3%83%bc%e3%83%95%e3%82%a3%e3%83%b3%e3%82%b0%e3%82%92%e5%a0%b1%e5%91%8a\/\">DMARC\u30ec\u30dd\u30fc\u30c8\u7528SecureNet<\/a>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/spamquellen-analyse-1234.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d5\u30a3\u30eb\u30bf\u30fc\u306b\u3088\u308b\u30b9\u30d1\u30e0\u8a55\u4fa1\uff1aX-Spam\u30b9\u30c6\u30fc\u30bf\u30b9\u3068BCL<\/h2>\n<p>\u591a\u304f\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u306f\u3001\u5185\u90e8\u30b9\u30d1\u30e0\u30d5\u30a3\u30eb\u30bf\u306b\u3088\u3063\u3066\u8ffd\u52a0\u3055\u308c\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306f\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u3067\u3042\u308b\u53ef\u80fd\u6027\u3092\u793a\u3059\u30b9\u30b3\u30a2\u3084\u30b9\u30c6\u30fc\u30bf\u30b9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u7279\u306b\u4e00\u822c\u7684\u3067\u3059\uff1a<\/p>\n<p><strong>X-\u30b9\u30d1\u30e0\u306e\u30b9\u30c6\u30fc\u30bf\u30b9<\/strong> \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u5185\u90e8\u30d5\u30a3\u30eb\u30bf\u306e\u3057\u304d\u3044\u5024\u3092\u8d85\u3048\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u793a\u3057\u307e\u3059\uff08\u4f8b\uff1aYES\u3001score=9.3\uff09\u3002<\/p>\n<p><strong>X-\u30b9\u30d1\u30e0\u30ec\u30d9\u30eb<\/strong> \u3057\u304d\u3044\u5024\u3092\u8868\u3059\u30a2\u30b9\u30bf\u30ea\u30b9\u30af\uff08\"*\"\uff09\u306e\u6570\u3002<\/p>\n<p><strong>BCL\u5024\uff1a<\/strong> \u30de\u30a4\u30af\u30ed\u30bd\u30d5\u30c8\u30fb\u30d5\u30a1\u30df\u30ea\u30fc\u306e\u30e1\u30fc\u30eb\u306b\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u30fb\u30ab\u30c6\u30b4\u30ea\u30fc\u30fb\u30ec\u30d9\u30eb\uff080\uff5e9\u306e\u30ea\u30b9\u30af\u30fb\u30d5\u30a1\u30af\u30bf\u30fc\uff09\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306e\u5024\u304c\u975e\u5e38\u306b\u9ad8\u3044\u5834\u5408\u306f\u3001\u7a4d\u6975\u7684\u306b\u8ffd\u8de1\u3068\u9001\u4fe1\u8005\u8abf\u67fb\u3092\u958b\u59cb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5206\u6790\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u305f\u308a\u3001\u540c\u3058\u30c1\u30e3\u30cd\u30eb\u306e\u4ed6\u306e\u30d8\u30c3\u30c0\u30fc\u3068\u6bd4\u8f03\u3059\u308b\u3053\u3068\u3067\u3001\u8a2d\u5b9a\u3084\u30b9\u30b3\u30a2\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u60c5\u5831\u304c\u898b\u3064\u304b\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<h2>\u30d8\u30c3\u30c0\u30fc\u8a55\u4fa1\u306e\u305f\u3081\u306e\u5206\u6790\u30c4\u30fc\u30eb<\/h2>\n<p>\u624b\u4f5c\u696d\u3067\u30d8\u30c3\u30c0\u30fc\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306e\u306f\u6642\u9593\u304c\u304b\u304b\u308b\u3002\u305d\u306e\u305f\u3081\u3001\u591a\u304f\u306e\u30c4\u30fc\u30eb\u304c\u30b0\u30e9\u30d5\u30a3\u30ab\u30eb\u306a\u5206\u6790\u3092\u63d0\u4f9b\u3057\u3001\u4e2d\u9593\u30b9\u30c6\u30c3\u30d7\u3092\u30ab\u30e9\u30fc\u3067\u8868\u793a\u3057\u305f\u308a\u3001IP\u3092\u76f4\u63a5\u30c1\u30a7\u30c3\u30af\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002\u4e00\u822c\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/p>\n<ul>\n  <li>Microsoft Message Header Analyser (Office365\u4e92\u63db)<\/li>\n  <li>\u30b0\u30fc\u30b0\u30eb\u30d8\u30c3\u30c0\u30fc\u30a2\u30ca\u30e9\u30a4\u30b6\u30fc\uff08Gmail\u7528\uff09<\/li>\n  <li>Mailheader.net (\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3001\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9)<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u306f\u3001SPF\u3001DKIM\u3001\u307e\u305f\u306fDMARC\u306e\u8a55\u4fa1\u3092\u660e\u78ba\u306b\u5f37\u8abf\u3057\u307e\u3059\u3002IP-DNS\u30de\u30c3\u30d4\u30f3\u30b0\u3001\u4e0d\u6b63\u306a\u8a2d\u5b9a\u3001\u4e0d\u5b8c\u5168\u306a\u30c1\u30a7\u30fc\u30f3\u3082\u4e00\u76ee\u3067\u8a8d\u8b58\u3067\u304d\u307e\u3059\u3002\u79c1\u306f\u8ee2\u9001\u3084\u4e00\u62ec\u53d7\u4fe1\u30e1\u30fc\u30eb\u3092\u5206\u6790\u3059\u308b\u3068\u304d\u306b\u3001\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u3092\u597d\u3093\u3067\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\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\/2025\/08\/email-header-analyse-5678.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u88dc\u8db3\u30bd\u30fc\u30b9\u3068\u3057\u3066\u306e\u30ed\u30b0\u30c7\u30fc\u30bf\uff1a\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u5206\u6790<\/h2>\n<p>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u52a0\u3048\u3066\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30ed\u30b0\u3082\u3055\u3089\u306a\u308b\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u95a2\u9023\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u30d5\u30ed\u30fc\u3001\u4e0d\u6b63\u306a\u914d\u4fe1\u3001\u307e\u305f\u306f\u7e70\u308a\u8fd4\u3057\u9001\u4fe1\u8005\u3092\u7c21\u5358\u306b\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8a73\u7d30\u306a\u30ed\u30b0\u306f\u3001Postfix\u3001Exim\u3001Microsoft Exchange\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u4f01\u696d\u74b0\u5883\u3067\u306f\u7279\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>\u30d8\u30c3\u30c0\u30fc\u3068\u30ed\u30b0\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b8c\u5168\u306a\u753b\u50cf\u304c\u5f97\u3089\u308c\u308b\u3002\u4f8b\u3048\u3070\u3001\u7591\u308f\u3057\u3044\u30e1\u30c3\u30bb\u30fc\u30b8ID\u30c1\u30a7\u30fc\u30f3\u3084\u3001\u4e0d\u6b63\u306aSPF\u30c7\u30fc\u30bf\u3092\u7e70\u308a\u8fd4\u3057\u914d\u4fe1\u3059\u308bIP\u30c9\u30e1\u30a4\u30f3\u3092\u63a2\u3057\u307e\u3059\u3002\u30c6\u30af\u30cb\u30ab\u30eb\u5206\u6790\u306f\u52b9\u7387\u7684\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/postfix-%e3%83%ad%e3%82%b0%e8%a7%a3%e6%9e%90-%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e8%a7%a3%e6%9e%90-%e3%83%ad%e3%82%b0%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%ac%e3%82%a4\/\">Postfix\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u6790<\/a> \u3068\u81ea\u52d5\u30d0\u30a6\u30f3\u30b9\u3002<\/p>\n\n<h2>\u5408\u6cd5\u7684\u306a\u8f38\u9001\u30eb\u30fc\u30c8\u306e\u5206\u985e<\/h2>\n<p>\u3059\u3079\u3066\u306e\u7570\u5e38\u306a\u30d8\u30c3\u30c0\u30fc\u884c\u304c\u81ea\u52d5\u7684\u306b\u7591\u308f\u3057\u3044\u3068\u306f\u9650\u3089\u306a\u3044\u3002\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u95a2\u4e0e\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3042\u308b\uff1a\u30cb\u30e5\u30fc\u30b9\u30ec\u30bf\u30fc\u30b5\u30fc\u30d3\u30b9\u3001CRM\u30b7\u30b9\u30c6\u30e0\u3001\u5185\u90e8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u306a\u3069\u306f\u3001\u3057\u3070\u3057\u3070DKIM\/SPF\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u5909\u66f4\u3059\u308b\u3002\u3053\u3053\u3067\u306f\u6587\u8108\u304c\u91cd\u8981\u3067\u3042\u308b\u3002<\/p>\n<p>\u6b63\u898f\u306e\u9001\u4fe1\u8005\u304b\u3089\u306e\u53c2\u7167\u30d8\u30c3\u30c0\u30fc\u3092\u5b9a\u671f\u7684\u306b\u4fdd\u5b58\u3057\u3066\u304a\u304f\u3079\u304d\u3067\u3059\u3002\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u901a\u5e38\u3068\u306f\u7570\u306a\u308b\u30b1\u30fc\u30b9\u3067\u3082\u3059\u3050\u306b\u9055\u3044\u3092\u8a8d\u8b58\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u8a3a\u65ad\u3084\u91cd\u5927\u306a\u914d\u4fe1\u30a8\u30e9\u30fc\u306e\u30b9\u30d4\u30fc\u30c9\u304c\u5411\u4e0a\u3057\u307e\u3059\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\/2025\/08\/entwickler-schreibtisch-1234.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d8\u30c3\u30c0\u30fc\u306e\u5206\u6790\u306b\u3088\u308a\u30b9\u30d1\u30e0\u306e\u9001\u4fe1\u5143\u3092\u78ba\u5b9f\u306b\u691c\u51fa<\/h2>\n<p>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u306f\u591a\u304f\u306e\u6280\u8853\u7684\u306a\u624b\u304c\u304b\u308a\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u3088\u308a\u7684\u3092\u7d5e\u3063\u305f\u65b9\u6cd5\u3067\u4e0d\u6b63\u4f7f\u7528\u3084\u4e0d\u8981\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u8a8d\u8b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u96a0\u308c\u305f\u30b5\u30fc\u30d0\u30fc\u30c1\u30a7\u30fc\u30f3\u3001\u8a8d\u8a3c\u30a8\u30e9\u30fc\u3001\u307e\u305f\u306f\u6a19\u7684\u578b\u507d\u9020\u3092\u767a\u898b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u7d14\u7c8b\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u30d9\u30fc\u30b9\u306e\u30c1\u30a7\u30c3\u30af\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n<p>\u4e0d\u5be9\u306a\u30d8\u30c3\u30c0\u30fc\u3092\u5b9a\u671f\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u7570\u5e38\u3092\u6587\u66f8\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u914d\u4fe1\u7387\u3092\u5411\u4e0a\u3055\u305b\u3001\u30e1\u30fc\u30eb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30ea\u30b9\u30c8\u30a8\u30f3\u30c8\u30ea\u3084\u4e0d\u6b63\u4f7f\u7528\u306e\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u30a4\u30f3\u30d5\u30e9\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\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\/2025\/08\/email-header-analyse-4739.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u8907\u96d1\u306a\u75c7\u4f8b\u306b\u5bfe\u3059\u308b\u9ad8\u5ea6\u306a\u51e6\u7f6e<\/h2>\n<p>\u7279\u306b\u5927\u4f01\u696d\u306e\u74b0\u5883\u3084\u96c6\u4e2d\u7684\u306aE\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u5834\u5408\u3001\u53d7\u4fe1\u56de\u7dda\u306b\u8907\u6570\u306e\u8ee2\u9001\u5c40\u3084\u4e2d\u9593\u5c40\u304c\u73fe\u308c\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308b\u3002\u4f8b\u3048\u3070\u3001\u4f01\u696d\u304c\u5916\u90e8\u306e\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u7d4c\u7531\u3067\u9001\u4fe1\u3057\u305f\u308a\u3001\u96c6\u4e2d\u578b\u306e\u30b9\u30d1\u30e0\u5bfe\u7b56\u30a2\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u3092\u4f7f\u7528\u3057\u305f\u308a\u3059\u308b\u5834\u5408\u3067\u3042\u308b\u3002\u305d\u306e\u7d50\u679c\u3001Received\u30d8\u30c3\u30c0\u30fc\u30d5\u30a3\u30fc\u30eb\u30c9\u3068X\u30d8\u30c3\u30c0\u30fc\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u8ffd\u52a0\u3055\u308c\u3001\u4e00\u898b\u3059\u308b\u3068\u6df7\u4e71\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u306f\u3001\u8a73\u7d30\u306a\u56f3\u3092\u63cf\u3044\u305f\u308a\u3001\u30d8\u30c3\u30c0\u30fc\u89e3\u6790\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u81ea\u52d5\u5316\u3055\u308c\u305f\u30ea\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u305f\u308a\u3059\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<p>\u8907\u96d1\u306a\u30d8\u30c3\u30c0\u30fc\u3092\u6271\u3046\u3053\u3068\u304c\u591a\u3044\u5834\u5408\u306f\u3001\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u5178\u578b\u7684\u306a\u8981\u7d20\u3068\u305d\u306e\u671f\u5f85\u3055\u308c\u308b\u5185\u5bb9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u30ea\u30b9\u30c8\u306b\u306f\u3001\u3069\u306eIP\u304cSPF\u30be\u30fc\u30f3\u3067\u8a8d\u53ef\u3055\u308c\u305f\u30bd\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u304b\u3001\u3069\u306eDKIM\u30bb\u30ec\u30af\u30bf\u304c\u30e1\u30fc\u30eb\u306b\u8868\u793a\u3055\u308c\u308b\u3079\u304d\u304b\u3092\u793a\u3057\u307e\u3059\u3002\u9038\u8131\u304c\u898b\u3064\u304b\u308c\u3070\u3059\u3050\u306b\u3001\u3053\u308c\u306f\u30d8\u30c3\u30c0\u30fc\u304c\u64cd\u4f5c\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u306e\u826f\u3044\u6307\u6a19\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n  <li><strong>\u53c2\u8003\u30d8\u30c3\u30c0\u30fc\u3068\u306e\u6bd4\u8f03\uff1a<\/strong> \u3042\u306a\u305f\u306e\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u306e\u6b63\u5f53\u306aE\u30e1\u30fc\u30eb\u306e\u4f8b\u3092\u7528\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n  <li><strong>DNS\u30ec\u30b3\u30fc\u30c9\u306e\u5b9a\u671f\u7684\u306a\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\uff1a<\/strong> \u5909\u66f4\u3055\u308c\u305fIP\u69cb\u9020\u306f\u3001\u5e38\u306bSPF\u3068DMARC\u306b\u901f\u3084\u304b\u306b\u53cd\u6620\u3055\u308c\u308b\u3079\u304d\u3067\u3042\u308b\u3002<\/li>\n  <li><strong>\u30d5\u30a9\u30ef\u30fc\u30c0\u30fc\u3078\u306e\u914d\u616e<\/strong> \u8a8d\u8a3c\u60c5\u5831\u306e\u53d7\u3051\u6e21\u3057\u306bARC\uff08Authenticated Received Chain\uff09\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002<\/li>\n<\/ul>\n\n<h2>\u30e1\u30c3\u30bb\u30fc\u30b8ID\u3068\u305d\u306e\u610f\u5473<\/h2>\n<p>\u73fe\u5834\u3082\u307e\u305f\u660e\u3089\u304b\u306b\u3057\u3066\u3044\u308b\u3002 <strong>\u30e1\u30c3\u30bb\u30fc\u30b8ID<\/strong>.\u9001\u4fe1\u3055\u308c\u308b\u5404\u30e1\u30fc\u30eb\u306b\u306f\u3001\u4f5c\u6210\u6642\u307e\u305f\u306f\u8ee2\u9001\u6642\u306b\u4e00\u610f\u306e\u8b58\u5225\u5b50\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30b9\u30d1\u30e0\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306e\u4e2d\u306b\u306f\u3001\u9001\u4fe1\u8005\u3084\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u7167\u5408\u3067\u304d\u306a\u3044\u4e00\u822c\u7684\u306a\u3001\u3042\u308b\u3044\u306f\u5b8c\u5168\u306b\u30e9\u30f3\u30c0\u30e0\u306a\u30e1\u30c3\u30bb\u30fc\u30b8ID\u3092\u4f7f\u7528\u3059\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8ID\u304c\u91cd\u8907\u3057\u3066\u3044\u305f\u308a\u3001ID\u304c\u76ee\u7acb\u3063\u3066\u5358\u7d14\u3067\u3042\u3063\u305f\u308a\u3059\u308b\u5834\u5408\u3082\u3001\u81ea\u52d5\u5316\u3055\u308c\u305f\u30b9\u30d1\u30e0\u30c4\u30fc\u30eb\u3092\u793a\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3084\u30a2\u30fc\u30ab\u30a4\u30d6\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u3063\u3066\u3001\u4f3c\u305f\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8ID\u3092\u898b\u3064\u3051\u3001\u30d1\u30bf\u30fc\u30f3\u3092\u8a8d\u8b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b7\u30ea\u30a2\u30eb\u5316\u3055\u308c\u305f\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30fb\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3092\u3088\u308a\u8fc5\u901f\u306b\u691c\u77e5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u30e1\u30c3\u30bb\u30fc\u30b8ID\u304c\u300cFrom:\u300d\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u3082\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u3001\u3053\u3053\u3067\u9001\u4fe1\u8005\u60c5\u5831\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h2>\u5b89\u5168\u57fa\u6e96\u306e\u88dc\u8db3\uff1aARC\u304a\u3088\u3073BIMI<\/h2>\n<p>Authenticated Received Chain (ARC)\u306f\u3001\u7279\u306b\u8ee2\u9001\u3084\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u3092\u4f7f\u3063\u305f\u8907\u96d1\u306a\u30e1\u30fc\u30eb\u30d5\u30ed\u30fc\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u308c\u306f\u3001\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u304b\u3069\u3046\u304b\u3092\u3088\u308a\u3088\u304f\u5224\u65ad\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u4e2d\u9593\u30b9\u30c6\u30fc\u30b7\u30e7\u30f3\u9593\u3067\u8a8d\u8a3c\u7d50\u679c\u3092\u6e21\u3059\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u884c\u3067\u3053\u308c\u3092\u8a8d\u8b58\u3067\u304d\u307e\u3059\u3002 <em>\u30a2\u30fc\u30af\u30fb\u30b7\u30fc\u30eb<\/em> \u6216\u3044\u306f <em>ARC-\u8a8d\u8a3c\u7d50\u679c<\/em>.\u3053\u308c\u3089\u306e\u30d8\u30c3\u30c0\u30fc\u304c\u6b63\u3057\u304f\u7ba1\u7406\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u30aa\u30ea\u30b8\u30ca\u30eb\u306eDKIM\u7f72\u540d\u306f\u8ee2\u9001\u5f8c\u3082\u6709\u52b9\u3067\u3042\u308b\u3002<\/p>\n<p>\u307e\u305f\u3001DMARC\u304c\u6b63\u3057\u304f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u9001\u4fe1\u8005\u306e\u30ed\u30b4\u3092\u8868\u793a\u3067\u304d\u308bBIMI\uff08Brand Indicators for Message Identification\uff09\u306e\u3088\u3046\u306a\u65b0\u3057\u3044\u53d6\u308a\u7d44\u307f\u3082\u3042\u308b\u3002BIMI\u306f\u3001\u914d\u4fe1\u30c1\u30a7\u30fc\u30f3\u306e\u89b3\u70b9\u304b\u3089\u306f\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u76f4\u63a5\u306e\u69cb\u6210\u8981\u7d20\u3067\u306f\u306a\u3044\u304c\u3001DKIM\u3084DMARC\u306a\u3069\u306e\u30d8\u30c3\u30c0\u30c7\u30fc\u30bf\u304c\u6b63\u3057\u304f\u5206\u6790\u3067\u304d\u308b\u5834\u5408\u306b\u306e\u307f\u3001\u78ba\u5b9f\u306b\u6a5f\u80fd\u3059\u308b\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001BIMI\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u304c\u5b9f\u969b\u306b\u30d6\u30e9\u30f3\u30c9\u6240\u6709\u8005\u304b\u3089\u6765\u305f\u3082\u306e\u306a\u306e\u304b\u3001\u305d\u308c\u3068\u3082\u507d\u9020\u3055\u308c\u305f\u3082\u306e\u306a\u306e\u304b\u3092\u8996\u899a\u7684\u306b\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n<h2>\u5178\u578b\u7684\u306a\u8a2d\u5b9a\u30df\u30b9\u3068\u305d\u306e\u898b\u3064\u3051\u65b9<\/h2>\n<p>\u76ee\u7acb\u3064\u30d8\u30c3\u30c0\u30fc\u306e\u3059\u3079\u3066\u304c\u60aa\u610f\u306e\u7d50\u679c\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u306a\u3044\u3002\u5358\u7d14\u306a\u8a2d\u5b9a\u30df\u30b9\u304c\u80cc\u5f8c\u306b\u3042\u308b\u3053\u3068\u3082\u591a\u3044\u3002\u4f8b\u3048\u3070\u3001\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u5148\u3092\u5909\u66f4\u3059\u308b\u969b\u306bDNS\u3092\u6b63\u3057\u304f\u8abf\u6574\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u3001\u81ea\u5206\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u4e0d\u6ce8\u610f\u306b\u8aa4\u3063\u305fSPF\u307e\u305f\u306fDKIM\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u914d\u4fe1\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u300cpass\u300d\u3067\u306f\u306a\u304f\u300csoftfail\u300d\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u306f\u3001\u9001\u4fe1\u8005IP\u304cSPF\u30ec\u30b3\u30fc\u30c9\u306b\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u793a\u3059\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n  <li><strong>DKIM \u7f72\u540d\u304c\u3042\u308a\u307e\u305b\u3093\uff1a<\/strong> \u7f72\u540d\u30b5\u30fc\u30d3\u30b9\u304c\u8aa4\u3063\u3066\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3001\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3002<\/li>\n  <li><strong>SPF\u30a8\u30f3\u30c8\u30ea\u30fc\u306b\u4e0d\u9069\u5207\u306aIP\u304c\u542b\u307e\u308c\u3066\u3044\u308b\uff1a<\/strong> \u65b0\u898f\u307e\u305f\u306f\u524a\u9664\u3055\u308c\u305fIP\u304c\u66f4\u65b0\u3055\u308c\u306a\u3044\u3002<\/li>\n  <li><strong>\u5fd8\u308c\u3089\u308c\u305f\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3<\/strong> \u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306f\u3001\u7279\u306b\u5927\u304d\u306a\u7d44\u7e54\u3067\u306f\u898b\u843d\u3068\u3055\u308c\u3084\u3059\u304f\u3001\u6b63\u3057\u3044SPF\u30ec\u30b3\u30fc\u30c9\u304c\u305d\u3053\u306b\u5165\u529b\u3055\u308c\u306a\u3044\u3002<\/li>\n<\/ul>\n<p>\u30d8\u30c3\u30c0\u30fc\u30c1\u30a7\u30c3\u30af\u4e2d\u306b\u540c\u3058\u8a2d\u5b9a\u30df\u30b9\u306b\u4f55\u5ea6\u3082\u906d\u9047\u3059\u308b\u5834\u5408\u306f\u3001\u9001\u4fe1\u8005\u306eDNS\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u78ba\u8a8d\u3057\u3001\u30bf\u30a4\u30d7\u30df\u30b9\u3092\u4fee\u6b63\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u306e\u8aa4\u691c\u51fa\u7387\u3092\u4e0b\u3052\u308b\u3068\u540c\u6642\u306b\u3001\u52b9\u679c\u7684\u306a\u30b9\u30d1\u30e0\u9632\u5fa1\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h2>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u5fdc\u7b54\u6642\u9593<\/h2>\n<p>\u52b9\u679c\u7684\u306a\u30b9\u30d1\u30e0\u5bfe\u7b56\u306b\u306f\u3001\u76ee\u7acb\u3064\u30e1\u30fc\u30eb\u3092\u7d20\u65e9\u304f\u8a8d\u8b58\u3057\u3001\u305d\u308c\u306b\u5fdc\u3058\u3066\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u898f\u6a21\u3084\u6bce\u65e5\u53d7\u4fe1\u3059\u308b\u30e1\u30fc\u30eb\u306e\u6570\u306b\u3082\u3088\u308b\u304c\u3001\u81ea\u52d5\u5316\u3059\u308b\u3053\u3068\u306f\u4fa1\u5024\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3002\u591a\u304f\u306e\u4f01\u696d\u304cSIEM\u3084\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u5c0e\u5165\u3057\u3001\u81ea\u52d5\u7684\u306b\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3066\u8105\u5a01\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3044\u308b\u3002\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u304c\u5831\u544a\u3055\u308c\u308b\u4e00\u5b9a\u306e\u3057\u304d\u3044\u5024\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u3082\u3046\u4e00\u3064\u306e\u6709\u52b9\u306a\u5bfe\u7b56\u306f\u3001\u30ab\u30b9\u30bf\u30de\u30fc\u30b5\u30dd\u30fc\u30c8\u3084IT\u30c1\u30fc\u30e0\u3067\u50cd\u304f\u5f93\u696d\u54e1\u306e\u5b9a\u671f\u7684\u306a\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3067\u3042\u308b\u3002\u5f7c\u3089\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u306b\u3042\u308b\u6700\u60aa\u306e\u30b9\u30d1\u30e0\u6307\u6a19\u3092\u5373\u5ea7\u306b\u8a8d\u8b58\u3059\u308b\u65b9\u6cd5\u3092\u77e5\u3063\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u91cd\u8981\u306a\u30e1\u30fc\u30eb\u304c\u8105\u5a01\u3068\u8a8d\u8b58\u3055\u308c\u308b\u524d\u306b\u30b7\u30b9\u30c6\u30e0\u5185\u306b\u9577\u304f\u7559\u307e\u308b\u3053\u3068\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3044\u3063\u305f\u3093\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u304c\u8a8d\u8b58\u3055\u308c\u308b\u3068\u3001\u660e\u78ba\u306a\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5bfe\u5fdc\u30eb\u30fc\u30c1\u30f3\u304c\u3055\u3089\u306a\u308b\u8abf\u67fb\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3001\u8a18\u4e8b\u3067\u8aac\u660e\u3057\u305f\u30c4\u30fc\u30eb\u3084\u30c6\u30af\u30cb\u30c3\u30af\u304c\u518d\u3073\u6d3b\u8e8d\u3059\u308b\u3002<\/p>\n\n<h2>\u30d8\u30c3\u30c0\u30fc\u5206\u6790\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30d7\u30ed\u30bb\u30b9\u5168\u4f53\u3078\u306e\u7d71\u5408<\/h2>\n<p>\u5fb9\u5e95\u7684\u306a\u30d8\u30c3\u30c0\u30fc\u5206\u6790\u306f\u3001\u6c7a\u3057\u3066\u5358\u72ec\u3067\u5b9f\u65bd\u3059\u3079\u304d\u3067\u306f\u306a\u3044\u3002\u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5168\u4f53\u7684\u306a\u9632\u5fa1\u306e\u9023\u9396\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4f8b\u3048\u3070\u3001\u4e0d\u5be9\u306aIP\u30a2\u30c9\u30ec\u30b9\u3092\u898b\u3064\u3051\u305f\u3089\u3001SPF\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u672c\u6587\u306e\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u3084\u30ea\u30f3\u30af\u5206\u6790\u3082\u5b9f\u65bd\u3059\u308b\u3002\u771f\u306e\u30dc\u30c3\u30c8\u30cd\u30c3\u30c8\u30fb\u30b9\u30d1\u30e0\u306f\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u64cd\u4f5c\u3001\u507d\u88c5\u30ea\u30f3\u30af\u3001\u30c8\u30ed\u30a4\u306e\u6728\u99ac\u306a\u3069\u3001\u8907\u6570\u306e\u653b\u6483\u624b\u6bb5\u306b\u57fa\u3065\u3044\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/p>\n<p>\u6a19\u6e96\u5316\u3055\u308c\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b9\u30bf\u30c3\u30af\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30d8\u30c3\u30c0\u30fc\u89e3\u6790\u306e\u7d50\u679c\u3092\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u307e\u305f\u306f\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u30ed\u30b0\u304b\u3089\u306e\u60c5\u5831\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u73fe\u5728\u3001\u8907\u6570\u306e\u30b5\u30fc\u30d3\u30b9\u3067\u30ed\u30b0\u30a4\u30f3\u5931\u6557\u3084DDoS\u653b\u6483\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3044\u308bIP\u304c\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u53d7\u4fe1\u884c\u306b\u540c\u6642\u306b\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u306f\u7279\u306b\u7591\u308f\u3057\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5fdc\u7b54\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3057\u3001\u5305\u62ec\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a55\u4fa1\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h2>\u52b9\u7387\u7684\u306a\u30d8\u30c3\u30c0\u30fc\u8a55\u4fa1\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<p>\u9577\u671f\u7684\u306b\u6210\u529f\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u3092\u5206\u6790\u3059\u308b\u969b\u306b\u3044\u304f\u3064\u304b\u306e\u57fa\u672c\u539f\u5247\u3092\u5b88\u308b\u3053\u3068\u304c\u671b\u307e\u3057\u3044\u3002\u4ee5\u4e0b\u304c\u305d\u306e\u4f8b\u3067\u3042\u308b\u3002<\/p>\n<ul>\n  <li><strong>\u8a08\u753b\u7684\u306b\u9032\u3081\u308b\uff1a<\/strong> \u6c7a\u3081\u3089\u308c\u305f\u9806\u5e8f\u306b\u5f93\u3063\u3066\u4f5c\u696d\u3059\u308b\u3002\u4f8b\u3048\u3070\u3001\u6700\u521d\u306b\u53d7\u4fe1\u884c\u3001\u6b21\u306b\u8a8d\u8a3c\u7d50\u679c\u3001X\u30d8\u30c3\u30c0\u30fc\u306e\u9806\u3002<\/li>\n  <li><strong>\u5b9a\u671f\u7684\u306b\u66f4\u65b0\u3059\u308b\uff1a<\/strong> \u6700\u3082\u91cd\u8981\u306a\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30d1\u30fc\u30c8\u30ca\u30fc\u306e\u30ca\u30ec\u30c3\u30b8\u30fb\u30d9\u30fc\u30b9\u3068\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u30fb\u30d8\u30c3\u30c0\u30fc\u3092\u5e38\u306b\u6700\u65b0\u306e\u72b6\u614b\u306b\u4fdd\u3064\u3002<\/li>\n  <li><strong>\u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\uff1a<\/strong> \u7279\u306b\u5927\u5bb9\u91cf\u306e\u74b0\u5883\u3067\u306f\u3001\u5c02\u7528\u306e\u5206\u6790\u30c4\u30fc\u30eb\u3092\u4f7f\u3048\u3070\u3001\u3088\u308a\u901f\u304f\u3001\u3088\u308a\u5b89\u5168\u306b\u3067\u304d\u308b\u3053\u3068\u3082\u3042\u308b\u3002<\/li>\n  <li><strong>\u6301\u7d9a\u53ef\u80fd\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3<\/strong> \u30d8\u30c3\u30c0\u30fc\u306e\u7570\u5e38\u306f\u3001\u3088\u308a\u5927\u304d\u306a\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u90e8\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u5185\u90e8\u30c1\u30b1\u30c3\u30c8\u307e\u305f\u306f\u30ed\u30b0\u3092\u4f7f\u7528\u3057\u3066\u3001\u8ffd\u8de1\u53ef\u80fd\u306a\u65b9\u6cd5\u3067\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u3092\u7ba1\u7406\u3059\u308b\u3002<\/li>\n<\/ul>\n<p>\u7279\u306b\u30c1\u30fc\u30e0\u306b\u304a\u3044\u3066\u306f\u3001\u30ca\u30ec\u30c3\u30b8\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30d8\u30c3\u30c0\u30fc\u3001\u8a8d\u8a3c\u7d50\u679c\u3001\u5206\u6790\u306e\u7c21\u5358\u306a\u30b5\u30de\u30ea\u30fc\u306a\u3069\u3001\u5177\u4f53\u7684\u306a\u30e1\u30fc\u30eb\u306e\u4f8b\u3092\u53ce\u96c6\u3059\u308b\u306e\u304c\u3088\u3044\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u4e0d\u5be9\u306a\u30e1\u30fc\u30eb\u3092\u5206\u6790\u3059\u308b\u969b\u306b\u4f55\u304c\u91cd\u8981\u306a\u306e\u304b\u3092\u3001\u65b0\u3057\u3044\u540c\u50da\u3067\u3082\u3059\u3050\u306b\u5b66\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h2>\u9001\u308a\u624b\u3068\u53d7\u3051\u624b\u304c\u30e1\u30ea\u30c3\u30c8\u3092\u5171\u6709<\/h2>\n<p>\u30af\u30ea\u30fc\u30f3\u3067\u8ffd\u8de1\u53ef\u80fd\u306a\u30e1\u30fc\u30eb\u30a4\u30f3\u30d5\u30e9\u306f\u3001\u53d7\u4fe1\u8005\u3060\u3051\u3067\u306a\u304f\u3001\u9001\u4fe1\u8005\u3068\u3057\u3066\u3082\u91cd\u8981\u3067\u3059\u3002\u5c02\u9580\u7684\u306a\u30cb\u30e5\u30fc\u30b9\u30ec\u30bf\u30fc\u3084\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u306f\u3001\u3059\u3079\u3066\u306e\u8a8d\u8a3c\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3046\u3057\u306a\u3044\u3068\u3001\u610f\u56f3\u305b\u305a\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u3063\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6b63\u3057\u3044SPF\u30a8\u30f3\u30c8\u30ea\u3001\u6709\u52b9\u306aDKIM\u30b7\u30b0\u30cd\u30c1\u30e3\u3001\u9069\u5207\u306aDMARC\u30dd\u30ea\u30b7\u30fc\u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u9001\u4fe1\u8005\u304c\u3059\u3050\u306b\u8a8d\u8b58\u3067\u304d\u3001\u7591\u308f\u3057\u3044\u30d5\u30a3\u30eb\u30bf\u30fc\u306b\u5f15\u3063\u304b\u304b\u308b\u53ef\u80fd\u6027\u304c\u4f4e\u304f\u306a\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/p>\n<p>\u53d7\u4fe1\u8005\u306f\u3001\u7d4c\u8def\u3084\u8a8d\u8a3c\u7d50\u679c\u304c\u660e\u78ba\u306b\u898b\u3048\u308b\u305f\u3081\u3001\u6f5c\u5728\u7684\u306a\u653b\u6483\u3084\u507d\u9020\u306e\u8a66\u307f\u3092\u3088\u308a\u8fc5\u901f\u306b\u691c\u77e5\u3067\u304d\u308b\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308b\u3002\u305d\u306e\u7d50\u679c\u3001\u53cc\u65b9\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u4ea4\u63db\u304c\u900f\u660e\u5316\u3055\u308c\u3001\u4fe1\u983c\u304c\u751f\u307e\u308c\u3001\u653b\u6483\u5bfe\u8c61\u304c\u6700\u5c0f\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n\n<h2>\u6982\u8981<\/h2>\n<p>\u30d8\u30c3\u30c0\u30fc\u5206\u6790\u306f\u3001\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u30b9\u30d1\u30e0\u3084\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u653b\u6483\u304c\u88ab\u5bb3\u3092\u3082\u305f\u3089\u3059\u524d\u306b\u8a8d\u8b58\u3059\u308b\u305f\u3081\u306e\u6700\u3082\u91cd\u8981\u306a\u30c6\u30af\u30cb\u30c3\u30af\u306e1\u3064\u3067\u3059\u3002\u53d7\u4fe1\u30c1\u30a7\u30fc\u30f3\u3001\u8a8d\u8a3c\u30c1\u30a7\u30c3\u30af\uff08SPF\u3001DKIM\u3001DMARC\uff09\u3001X-Spam-Status\u3084BCL\u5024\u306e\u3088\u3046\u306a\u7279\u5225\u306b\u633f\u5165\u3055\u308c\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u898b\u308b\u3053\u3068\u3067\u3001\u96a0\u308c\u305f\u30c8\u30ea\u30c3\u30af\u3084\u6a19\u7684\u3092\u7d5e\u3063\u305f\u6b3a\u779e\u306e\u8a66\u307f\u3092\u767a\u898b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8907\u96d1\u306a\u74b0\u5883\u3067\u306f\u3001\u4f53\u7cfb\u7684\u306b\u9032\u3081\u3001\u53c2\u7167\u30d8\u30c3\u30c0\u30fc\u3092\u7dad\u6301\u3057\u3001\u9038\u8131\u3092\u6b63\u78ba\u306b\u6587\u66f8\u5316\u3059\u308b\u3053\u3068\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002\u540c\u6642\u306b\u3001\u4fe1\u983c\u3067\u304d\u308b\u7d50\u679c\u3092\u5f97\u308b\u305f\u3081\u306b\u306f\u3001\u30c4\u30fc\u30eb\u3068\u30ed\u30b0\u5206\u6790\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u3092\u5b9a\u671f\u7684\u306b\u5206\u6790\u3057\u3001\u767a\u898b\u3055\u308c\u305f\u30d1\u30bf\u30fc\u30f3\u306b\u5bfe\u51e6\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9ad8\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30b9\u30d1\u30e0\u7387\u306e\u4f4e\u4e0b\u306e\u6069\u6075\u3092\u53d7\u3051\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u81ea\u793e\u306e\u914d\u4fe1\u7387\u3082\u5411\u4e0a\u3057\u307e\u3059\u3002\u69cb\u9020\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u3001\u9069\u5207\u306a\u30c4\u30fc\u30eb\u3001\u305d\u3057\u3066DNS\u30ec\u30b3\u30fc\u30c9\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u52d5\u4f5c\u3001\u5927\u5931\u6557\u3057\u304c\u3061\u306a\u8a2d\u5b9a\u306b\u95a2\u3059\u308b\u78ba\u304b\u306a\u57fa\u790e\u77e5\u8b58\u304c\u3001\u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u3067\u4fe1\u983c\u3067\u304d\u308b\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u9375\u3067\u3059\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u30ac\u30a4\u30c9\u30e1\u30fc\u30eb\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u5206\u6790\u3057\u3001\u53d7\u4fe1\u3057\u305f\u30c1\u30a7\u30fc\u30f3\u3092\u8aad\u307f\u3001SPF\/DKIM\/DMARC\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u30b9\u30d1\u30e0\u306e\u9001\u4fe1\u5143\u3092\u7279\u5b9a\u3059\u308b\u3002\u30d5\u30a9\u30fc\u30ab\u30b9: \u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306e\u5206\u6790<\/p>","protected":false},"author":1,"featured_media":12006,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","inline_featured_image":false,"footnotes":""},"categories":[821],"tags":[],"class_list":["post-12013","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spambekaempfung-web_hosting"],"acf":[],"_wp_attached_file":null,"_wp_attachment_metadata":null,"litespeed-optimize-size":null,"litespeed-optimize-set":null,"_elementor_source_image_hash":null,"_wp_attachment_image_alt":null,"stockpack_author_name":null,"stockpack_author_url":null,"stockpack_provider":null,"stockpack_image_url":null,"stockpack_license":null,"stockpack_license_url":null,"stockpack_modification":null,"color":null,"original_id":null,"original_url":null,"original_link":null,"unsplash_location":null,"unsplash_sponsor":null,"unsplash_exif":null,"unsplash_attachment_metadata":null,"_elementor_is_screenshot":null,"surfer_file_name":null,"surfer_file_original_url":null,"envato_tk_source_kit":null,"envato_tk_source_index":null,"envato_tk_manifest":null,"envato_tk_folder_name":null,"envato_tk_builder":null,"envato_elements_download_event":null,"_menu_item_type":null,"_menu_item_menu_item_parent":null,"_menu_item_object_id":null,"_menu_item_object":null,"_menu_item_target":null,"_menu_item_classes":null,"_menu_item_xfn":null,"_menu_item_url":null,"_trp_menu_languages":null,"rank_math_primary_category":null,"rank_math_title":null,"inline_featured_image":null,"_yoast_wpseo_primary_category":null,"rank_math_schema_blogposting":null,"rank_math_schema_videoobject":null,"_oembed_049c719bc4a9f89deaead66a7da9fddc":null,"_oembed_time_049c719bc4a9f89deaead66a7da9fddc":null,"_yoast_wpseo_focuskw":null,"_yoast_wpseo_linkdex":null,"_oembed_27e3473bf8bec795fbeb3a9d38489348":null,"_oembed_c3b0f6959478faf92a1f343d8f96b19e":null,"_trp_translated_slug_en_us":null,"_wp_desired_post_slug":null,"_yoast_wpseo_title":null,"tldname":null,"tldpreis":null,"tldrubrik":null,"tldpolicylink":null,"tldsize":null,"tldregistrierungsdauer":null,"tldtransfer":null,"tldwhoisprivacy":null,"tldregistrarchange":null,"tldregistrantchange":null,"tldwhoisupdate":null,"tldnameserverupdate":null,"tlddeletesofort":null,"tlddeleteexpire":null,"tldumlaute":null,"tldrestore":null,"tldsubcategory":null,"tldbildname":null,"tldbildurl":null,"tldclean":null,"tldcategory":null,"tldpolicy":null,"tldbesonderheiten":null,"tld_bedeutung":null,"_oembed_d167040d816d8f94c072940c8009f5f8":null,"_oembed_b0a0fa59ef14f8870da2c63f2027d064":null,"_oembed_4792fa4dfb2a8f09ab950a73b7f313ba":null,"_oembed_33ceb1fe54a8ab775d9410abf699878d":null,"_oembed_fd7014d14d919b45ec004937c0db9335":null,"_oembed_21a029d076783ec3e8042698c351bd7e":null,"_oembed_be5ea8a0c7b18e658f08cc571a909452":null,"_oembed_a9ca7a298b19f9b48ec5914e010294d2":null,"_oembed_f8db6b27d08a2bb1f920e7647808899a":null,"_oembed_168ebde5096e77d8a89326519af9e022":null,"_oembed_cdb76f1b345b42743edfe25481b6f98f":null,"_oembed_87b0613611ae54e86e8864265404b0a1":null,"_oembed_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_oembed_time_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_tldname":null,"_tldclean":null,"_tldpreis":null,"_tldcategory":null,"_tldsubcategory":null,"_tldpolicy":null,"_tldpolicylink":null,"_tldsize":null,"_tldregistrierungsdauer":null,"_tldtransfer":null,"_tldwhoisprivacy":null,"_tldregistrarchange":null,"_tldregistrantchange":null,"_tldwhoisupdate":null,"_tldnameserverupdate":null,"_tlddeletesofort":null,"_tlddeleteexpire":null,"_tldumlaute":null,"_tldrestore":null,"_tldbildname":null,"_tldbildurl":null,"_tld_bedeutung":null,"_tldbesonderheiten":null,"_oembed_ad96e4112edb9f8ffa35731d4098bc6b":null,"_oembed_8357e2b8a2575c74ed5978f262a10126":null,"_oembed_3d5fea5103dd0d22ec5d6a33eff7f863":null,"_eael_widget_elements":null,"_oembed_0d8a206f09633e3d62b95a15a4dd0487":null,"_oembed_time_0d8a206f09633e3d62b95a15a4dd0487":null,"_aioseo_description":null,"_eb_attr":null,"_eb_data_table":null,"_oembed_819a879e7da16dd629cfd15a97334c8a":null,"_oembed_time_819a879e7da16dd629cfd15a97334c8a":null,"_acf_changed":null,"_wpcode_auto_insert":null,"_edit_last":null,"_edit_lock":null,"_oembed_e7b913c6c84084ed9702cb4feb012ddd":null,"_oembed_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_time_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_03514b67990db061d7c4672de26dc514":null,"_oembed_time_03514b67990db061d7c4672de26dc514":null,"rank_math_news_sitemap_robots":null,"rank_math_robots":null,"_eael_post_view_count":"4379","_trp_automatically_translated_slug_ru_ru":null,"_trp_automatically_translated_slug_et":null,"_trp_automatically_translated_slug_lv":null,"_trp_automatically_translated_slug_fr_fr":null,"_trp_automatically_translated_slug_en_us":null,"_wp_old_slug":null,"_trp_automatically_translated_slug_da_dk":null,"_trp_automatically_translated_slug_pl_pl":null,"_trp_automatically_translated_slug_es_es":null,"_trp_automatically_translated_slug_hu_hu":null,"_trp_automatically_translated_slug_fi":null,"_trp_automatically_translated_slug_ja":null,"_trp_automatically_translated_slug_lt_lt":null,"_elementor_edit_mode":null,"_elementor_template_type":null,"_elementor_version":null,"_elementor_pro_version":null,"_wp_page_template":null,"_elementor_page_settings":null,"_elementor_data":null,"_elementor_css":null,"_elementor_conditions":null,"_happyaddons_elements_cache":null,"_oembed_75446120c39305f0da0ccd147f6de9cb":null,"_oembed_time_75446120c39305f0da0ccd147f6de9cb":null,"_oembed_3efb2c3e76a18143e7207993a2a6939a":null,"_oembed_time_3efb2c3e76a18143e7207993a2a6939a":null,"_oembed_59808117857ddf57e478a31d79f76e4d":null,"_oembed_time_59808117857ddf57e478a31d79f76e4d":null,"_oembed_965c5b49aa8d22ce37dfb3bde0268600":null,"_oembed_time_965c5b49aa8d22ce37dfb3bde0268600":null,"_oembed_81002f7ee3604f645db4ebcfd1912acf":null,"_oembed_time_81002f7ee3604f645db4ebcfd1912acf":null,"_elementor_screenshot":null,"_oembed_7ea3429961cf98fa85da9747683af827":null,"_oembed_time_7ea3429961cf98fa85da9747683af827":null,"_elementor_controls_usage":null,"_elementor_page_assets":[],"_elementor_screenshot_failed":null,"theplus_transient_widgets":null,"_eael_custom_js":null,"_wp_old_date":null,"_trp_automatically_translated_slug_it_it":null,"_trp_automatically_translated_slug_pt_pt":null,"_trp_automatically_translated_slug_zh_cn":null,"_trp_automatically_translated_slug_nl_nl":null,"_trp_automatically_translated_slug_pt_br":null,"_trp_automatically_translated_slug_sv_se":null,"rank_math_analytic_object_id":null,"rank_math_internal_links_processed":null,"_trp_automatically_translated_slug_ro_ro":null,"_trp_automatically_translated_slug_sk_sk":null,"_trp_automatically_translated_slug_bg_bg":null,"_trp_automatically_translated_slug_sl_si":null,"litespeed_vpi_list":["webhostinglogo.png"],"litespeed_vpi_list_mobile":["webhostinglogo.png"],"rank_math_seo_score":null,"rank_math_contentai_score":null,"ilj_limitincominglinks":null,"ilj_maxincominglinks":null,"ilj_limitoutgoinglinks":null,"ilj_maxoutgoinglinks":null,"ilj_limitlinksperparagraph":null,"ilj_linksperparagraph":null,"ilj_blacklistdefinition":null,"ilj_linkdefinition":null,"_eb_reusable_block_ids":null,"rank_math_focus_keyword":"email header","rank_math_og_content_image":null,"_yoast_wpseo_metadesc":null,"_yoast_wpseo_content_score":null,"_yoast_wpseo_focuskeywords":null,"_yoast_wpseo_keywordsynonyms":null,"_yoast_wpseo_estimated-reading-time-minutes":null,"rank_math_description":null,"surfer_last_post_update":null,"surfer_last_post_update_direction":null,"surfer_keywords":null,"surfer_location":null,"surfer_draft_id":null,"surfer_permalink_hash":null,"surfer_scrape_ready":null,"_thumbnail_id":"12006","footnotes":null,"_links":{"self":[{"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/posts\/12013","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/comments?post=12013"}],"version-history":[{"count":0,"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/posts\/12013\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/media\/12006"}],"wp:attachment":[{"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/media?parent=12013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/categories?post=12013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhosting.de\/ja\/wp-json\/wp\/v2\/tags?post=12013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}