{"id":20723,"date":"2026-01-09T10:30:21","date_gmt":"2026-01-09T01:30:21","guid":{"rendered":"https:\/\/www.synergy-marketing.co.jp\/blog\/?p=20723"},"modified":"2026-01-09T10:30:21","modified_gmt":"2026-01-09T01:30:21","slug":"email_error-message-list","status":"publish","type":"post","link":"https:\/\/www.synergy-marketing.co.jp\/blog\/email_error-message-list","title":{"rendered":"\u3010\u30e1\u30fc\u30eb\u30a8\u30e9\u30fc\u4e00\u89a7\u3011\u62c5\u5f53\u8005\u304c\u77e5\u308b\u3079\u304d\u539f\u56e0\u3068\u5bfe\u7b56\uff5c\u5230\u9054\u7387\u3092\u9ad8\u3081\u308b\u65b9\u6cd5"},"content":{"rendered":"<div class=\"post-content\">\n<div class=\"box box-gray\">\n<p><strong>&lt;\u3053\u306e\u8a18\u4e8b\u3067\u308f\u304b\u308b\u3053\u3068&gt;<\/strong><\/p>\n<ul>\n<li>\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u306e\u653e\u7f6e\u304c\u3001\u306a\u305c\u4f01\u696d\u306e\u6a5f\u4f1a\u640d\u5931\u3084\u4fe1\u983c\u4f4e\u4e0b\u306b\u3064\u306a\u304c\u308b\u306e\u304b\u3001\u305d\u306e\u7406\u7531\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/li>\n<li>\u300cUser unknown\u300d\u306a\u3069\u3001\u62c5\u5f53\u8005\u304c\u3088\u304f\u76ee\u306b\u3059\u308b\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u610f\u5473\u3068\u539f\u56e0\u3001\u5177\u4f53\u7684\u306a\u5bfe\u51e6\u6cd5\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/li>\n<li>\u30a8\u30e9\u30fc\u3092\u672a\u7136\u306b\u9632\u3050\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u306a\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\uff08SPF\u30fbDKIM\u30fbDMARC\uff09\u306e\u91cd\u8981\u6027\u304c\u7406\u89e3\u3067\u304d\u307e\u3059\u3002<\/li>\n<li>\u30e1\u30fc\u30eb\u914d\u4fe1\u30c4\u30fc\u30eb\u306a\u3069\u3092\u6d3b\u7528\u3057\u3066\u3001\u30a8\u30e9\u30fc\u5bfe\u7b56\u3092\u52b9\u7387\u5316\u3057\u3001\u30e1\u30fc\u30eb\u5230\u9054\u7387\u3092\u7dad\u6301\u3059\u308b\u65b9\u6cd5\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_mainvisual.png\" alt=\"\u3010\u30e1\u30fc\u30eb\u30a8\u30e9\u30fc\u4e00\u89a7\u3011\u62c5\u5f53\u8005\u304c\u77e5\u308b\u3079\u304d\u539f\u56e0\u3068\u5bfe\u7b56\uff5c\u5230\u9054\u7387\u3092\u9ad8\u3081\u308b\u65b9\u6cd5\" width=\"750\" height=\"456\" \/><\/p>\n<p>\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3084\u696d\u52d9\u9023\u7d61\u3092\u884c\u3046\u3046\u3048\u3067\u3001\u907f\u3051\u3066\u901a\u308c\u306a\u3044\u306e\u304c\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u767a\u751f\u3067\u3059\u3002\u9001\u4fe1\u6642\u306e\u5165\u529b\u30df\u30b9\u3084\u53d7\u4fe1\u5074\u306e\u8a2d\u5b9a\u5909\u66f4\u306a\u3069\u3001\u539f\u56e0\u306f\u3055\u307e\u3056\u307e\u3067\u3059\u304c\u3001\u554f\u984c\u306f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u653e\u7f6e\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3001\u300c\u306a\u305c\u767a\u751f\u3059\u308b\u306e\u304b\u300d\u300c\u3069\u3093\u306a\u7a2e\u985e\u306e\u30a8\u30e9\u30fc\u304c\u5371\u967a\u306a\u306e\u304b\u300d\u304c\u308f\u304b\u3089\u305a\u3001\u3064\u3044\u5f8c\u56de\u3057\u306b\u3057\u3066\u3057\u307e\u3046\u65b9\u3082\u591a\u3044\u3067\u3057\u3087\u3046\u3002\u305d\u3053\u3067\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u3092\u653e\u7f6e\u3059\u308b\u3053\u3068\u3067\u751f\u3058\u308b\u30ea\u30b9\u30af\u3068\u3001\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8aad\u307f\u89e3\u304d\u65b9\u3001\u305d\u3057\u3066\u914d\u4fe1\u54c1\u8cea\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u5177\u4f53\u7684\u306a\u5bfe\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<div class=\"inner-cta\">\n<div class=\"inner-cta-content\">\n<div class=\"inner-cta-content-img\">\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/wp\/wp-content\/uploads\/thumb_mail_checksheet.png\" alt=\"\u3059\u3050\u4f7f\u3048\u308b\u30c1\u30a7\u30c3\u30af\u30b7\u30fc\u30c8\u4ed8\uff01\u8aa4\u914d\u4fe1\u3092\u9632\u3050\u30e1\u30fc\u30eb\u5236\u4f5c\u30fb\u914d\u4fe1\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\" width=\"200\" height=\"150\" \/><\/p>\n<\/div>\n<div class=\"inner-cta-content-text\">\n<h4>\u3059\u3050\u4f7f\u3048\u308b\u30c1\u30a7\u30c3\u30af\u30b7\u30fc\u30c8\u4ed8\uff01\u8aa4\u914d\u4fe1\u3092\u9632\u3050\u30e1\u30fc\u30eb\u5236\u4f5c\u30fb\u914d\u4fe1\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h4>\n<p>\u30e1\u30fc\u30eb\u5236\u4f5c\u30fb\u914d\u4fe1\u6642\u306e\u8aa4\u914d\u4fe1\u3092\u9632\u3050\u305f\u3081\u306b\u77e5\u3063\u3066\u304a\u304d\u305f\u3044\u77e5\u8b58\u3068\u904b\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb<\/p>\n<p class=\"inner-cta-content-btn\"><a id=\"ct-blog-innnercta-01\" class=\"btn btn-red btn-block\" href=\"https:\/\/form.synergy-marketing.co.jp\/webapp\/form\/18784_mubb_10\/index.do?code=mail_checksheet\" target=\"_blank\" rel=\"noopener\">\u8cc7\u6599\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2>\u306a\u305c\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\uff08\u30d0\u30a6\u30f3\u30b9\u30e1\u30fc\u30eb\uff09\u3092\u653e\u7f6e\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u306e\u304b\uff1f<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_image01.png\" alt=\"\u306a\u305c\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\uff08\u30d0\u30a6\u30f3\u30b9\u30e1\u30fc\u30eb\uff09\u3092\u653e\u7f6e\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u306e\u304b\uff1f\" width=\"750\" height=\"456\" class=\"alignnone size-full wp-image-20719\" srcset=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_image01.png 750w, https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_image01-230x140.png 230w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<p>\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\uff08<a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/what-is-bounce-email\" target=\"_blank\" rel=\"noopener\">\u30d0\u30a6\u30f3\u30b9\u30e1\u30fc\u30eb<\/a>\uff09\u306f\u653e\u7f6e\u3057\u3066\u304a\u304f\u3068\u91cd\u5927\u306a\u554f\u984c\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u914d\u4fe1\u30ea\u30b9\u30c8\u306e\u54c1\u8cea\u304c\u4e0b\u304c\u308a\u3001\u5230\u9054\u7387\u3084\u30d6\u30e9\u30f3\u30c9\u306e\u4fe1\u983c\u6027\u306b\u3082\u5f71\u97ff\u3092\u53ca\u307c\u3057\u304b\u306d\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u3092\u653e\u7f6e\u3059\u308b\u3053\u3068\u3067\u751f\u3058\u308b3\u3064\u306e\u30ea\u30b9\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u5230\u9054\u7387\u306e\u4f4e\u4e0b\u3068\u6a5f\u4f1a\u640d\u5931<\/h3>\n<p>\u5b58\u5728\u3057\u306a\u3044\u30a2\u30c9\u30ec\u30b9\u306b\u30e1\u30fc\u30eb\u3092\u9001\u308a\u7d9a\u3051\u308b\u3068\u3001ISP\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\uff09\u304b\u3089\u300c\u8cea\u306e\u4f4e\u3044\u30ea\u30b9\u30c8\u306b\u914d\u4fe1\u3057\u3066\u3044\u308b\u300d\u3068\u5224\u65ad\u3055\u308c\u3001\u30b9\u30d1\u30e0\u6271\u3044\u3055\u308c\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u30a8\u30e9\u30fc\u3068\u306f\u95a2\u4fc2\u306e\u306a\u3044\u6b63\u5e38\u306a\u5b9b\u5148\u306b\u3082\u30e1\u30fc\u30eb\u304c\u5c4a\u304d\u306b\u304f\u304f\u306a\u308a\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u632f\u308a\u5206\u3051\u3089\u308c\u308b\u30b1\u30fc\u30b9\u3082\u5897\u3048\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u304c\u7d9a\u304f\u3068\u3001\u9867\u5ba2\u306b\u91cd\u8981\u306a\u60c5\u5831\u304c\u5c4a\u304b\u305a\u3001\u305b\u3063\u304b\u304f\u306e\u8ca9\u4fc3\u6a5f\u4f1a\u3092\u9003\u3059\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u6570\u4ef6\u306e\u30a8\u30e9\u30fc\u3092\u653e\u7f6e\u3059\u308b\u3060\u3051\u3067\u3001\u30e1\u30fc\u30eb\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e0b\u3052\u3066\u3057\u307e\u3046\u30ea\u30b9\u30af\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n<div class=\"box\">\n<div class=\"row\">\n<div class=\"col-md-3 col-sm-4 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/mailmagazine_deliverability\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/571_mainvisual.png\" alt=\"\u30e1\u30eb\u30de\u30ac\u306e\u5230\u9054\u7387\u3068\u306f\uff1f\u5230\u9054\u7387\u3092\u6c7a\u3081\u308b\u8981\u56e0\u3084\u6539\u5584\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\" \/><\/a><\/div>\n<div class=\"col-md-9 col-sm-8 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/mailmagazine_deliverability\" target=\"_blank\" rel=\"noopener\"><strong>\u30e1\u30eb\u30de\u30ac\u306e\u5230\u9054\u7387\u3068\u306f\uff1f\u5230\u9054\u7387\u3092\u6c7a\u3081\u308b\u8981\u56e0\u3084\u6539\u5584\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<h3>\u9001\u4fe1\u5143IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u60aa\u5316<\/h3>\n<p>\u300cIP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u300d\u3068\u306f\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u306e\u4fe1\u983c\u6027\u3092\u8a55\u4fa1\u3059\u308b\u6307\u6a19\u3067\u3059\u3002\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u7387\u304c\u9ad8\u3044\u72b6\u614b\u3092\u653e\u7f6e\u3059\u308b\u3068\u3001ISP\u3084\u53d7\u4fe1\u30b5\u30fc\u30d0\u306b\u300c\u4fe1\u983c\u3067\u304d\u306a\u3044\u9001\u4fe1\u5143\u300d\u3068\u5224\u65ad\u3055\u308c\u3001\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3055\u308c\u308b\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3044\u3063\u305f\u3093\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u4e0b\u304c\u308b\u3068\u3001\u77ed\u671f\u9593\u3067\u56de\u5fa9\u3055\u305b\u308b\u306e\u306f\u96e3\u3057\u304f\u3001\u6b63\u5e38\u306a\u30e1\u30fc\u30eb\u914d\u4fe1\u306b\u3082\u5f71\u97ff\u304c\u53ca\u3073\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u914d\u4fe1\u505c\u6b62\u3084\u30a2\u30ab\u30a6\u30f3\u30c8\u5236\u9650\u3068\u3044\u3063\u305f\u6df1\u523b\u306a\u30c8\u30e9\u30d6\u30eb\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u3082\u3042\u308b\u305f\u3081\u3001\u65e9\u671f\u306e\u5bfe\u5fdc\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002<\/p>\n<h3>\u914d\u4fe1\u30b3\u30b9\u30c8\u306e\u7121\u99c4<\/h3>\n<p>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306e\u591a\u304f\u306f\u3001\u9001\u4fe1\u901a\u6570\u3084\u767b\u9332\u30a2\u30c9\u30ec\u30b9\u6570\u306b\u5fdc\u3058\u3066\u8ab2\u91d1\u3055\u308c\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u5c4a\u304b\u306a\u3044\u3068\u308f\u304b\u3063\u3066\u3044\u308b\u30a2\u30c9\u30ec\u30b9\u306b\u9001\u4fe1\u3092\u7d9a\u3051\u308b\u3053\u3068\u306f\u3001\u30b3\u30b9\u30c8\u306e\u7121\u99c4\u9063\u3044\u306b\u307b\u304b\u306a\u308a\u307e\u305b\u3093\u3002\u7279\u306b\u3001\u5927\u898f\u6a21\u306a\u914d\u4fe1\u3092\u884c\u3046\u4f01\u696d\u3067\u306f\u3001\u6570\uff05\u306e\u30a8\u30e9\u30fc\u3067\u3082\u5e74\u9593\u3067\u898b\u308c\u3070\u76f8\u5f53\u306a\u91d1\u984d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u3092\u5b9a\u671f\u7684\u306b\u9664\u5916\u30fb\u6574\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u7121\u99c4\u306a\u914d\u4fe1\u30b3\u30b9\u30c8\u3092\u524a\u6e1b\u3067\u304d\u3001\u9650\u3089\u308c\u305f\u4e88\u7b97\u3092\u672c\u5f53\u306b\u53cd\u5fdc\u304c\u5f97\u3089\u308c\u308b\u9867\u5ba2\u5c64\u306b\u96c6\u4e2d\u3067\u304d\u307e\u3059\u3002\u30b3\u30b9\u30c8\u6700\u9069\u5316\u306e\u89b3\u70b9\u304b\u3089\u3082\u3001\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u306e\u7ba1\u7406\u306f\u91cd\u8981\u306a\u65bd\u7b56\u3068\u3044\u3048\u307e\u3059\u3002<\/p>\n<div class=\"inner-cta\">\n<div class=\"inner-cta-content\">\n<div class=\"inner-cta-content-img\">\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/wp\/wp-content\/uploads\/thumb_btob_lead.png\" alt=\"\u898b\u8fbc\u307f\u9867\u5ba2\u306e\u7372\u5f97\u6570\u30fb\u53d7\u6ce8\u6570\u3092\u5411\u4e0a\u3055\u305b\u308b\u3001\u5b9f\u8df5\u7684\u624b\u6cd5\u3092\u7d39\u4ecb\uff01\" width=\"200\" height=\"150\" \/><\/p>\n<\/div>\n<div class=\"inner-cta-content-text\">\n<h4>\u898b\u8fbc\u307f\u9867\u5ba2\u306e\u7372\u5f97\u6570\u30fb\u53d7\u6ce8\u6570\u3092\u5411\u4e0a\u3055\u305b\u308b\u3001\u5b9f\u8df5\u7684\u624b\u6cd5\u3092\u7d39\u4ecb\uff01<\/h4>\n<p>\u7372\u5f97\u3057\u305f\u30ea\u30fc\u30c9\u3092\u5546\u8ac7\u306b\u3064\u306a\u3052\u308b\u305f\u3081\u306e\u624b\u6cd5\u3092\u3001\u5b9f\u4f8b\u3092\u3082\u3068\u306b\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p class=\"inner-cta-content-btn\"><a id=\"ct-blog-innnercta-02\" class=\"btn btn-red btn-block\" href=\"https:\/\/form.synergy-marketing.co.jp\/webapp\/form\/18784_mubb_10\/index.do?code=btob_lead\" target=\"_blank\" rel=\"noopener\">\u8cc7\u6599\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2>\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u4e00\u89a7<\/h2>\n<p>\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u304c\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3068\u3001\u591a\u304f\u306e\u5834\u5408\u300cMAILER-DAEMON\u300d\u3084\u300cMail Delivery Subsystem\u300d\u3068\u3044\u3046\u5dee\u51fa\u4eba\u304b\u3089\u81ea\u52d5\u3067\u30e1\u30fc\u30eb\u304c\u8fd4\u9001\u3055\u308c\u3066\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u30a8\u30e9\u30fc\u3092\u901a\u77e5\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3042\u308a\u3001\u305d\u306e\u672c\u6587\u306b\u66f8\u304b\u308c\u305f\u5177\u4f53\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8aad\u307f\u89e3\u304f\u3053\u3068\u304c\u539f\u56e0\u7a76\u660e\u306e\u7b2c\u4e00\u6b69\u3067\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u305d\u306e\u672c\u6587\u306b\u3088\u304f\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u539f\u56e0\u30fb\u5bfe\u51e6\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<div class=\"box\">\n<div class=\"row\">\n<div class=\"col-md-3 col-sm-4 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/email-delivery_error\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/541_mainvisual.png\" alt=\"\u30e1\u30fc\u30eb\u306e\u914d\u4fe1\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\uff01\u30a8\u30e9\u30fc\u3092\u6e1b\u3089\u3059\u65b9\u6cd5\u3082\u89e3\u8aac\" \/><\/a><\/div>\n<div class=\"col-md-9 col-sm-8 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/email-delivery_error\" target=\"_blank\" rel=\"noopener\"><strong>\u30e1\u30fc\u30eb\u306e\u914d\u4fe1\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\uff01\u30a8\u30e9\u30fc\u3092\u6e1b\u3089\u3059\u65b9\u6cd5\u3082\u89e3\u8aac<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<h3>MAILER-DAEMON<\/h3>\n<p>\u300cMAILER-DAEMON\u300d\u3084\u300cMail Delivery Subsystem\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u30e1\u30fc\u30eb\u306f\u3001\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u304c\u5b9b\u5148\u306b\u5c4a\u304b\u305a\u3001\u30b5\u30fc\u30d0\u304b\u3089\u81ea\u52d5\u3067\u8fd4\u9001\u3055\u308c\u305f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3059\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u672c\u6587\u306b\u306f\u914d\u4fe1\u3067\u304d\u306a\u304b\u3063\u305f\u7406\u7531\u3084\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u304c\u8a18\u8f09\u3055\u308c\u3066\u304a\u308a\u3001\u539f\u56e0\u3092\u7a81\u304d\u6b62\u3081\u308b\u624b\u304c\u304b\u308a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001\u5b9b\u5148\u30a2\u30c9\u30ec\u30b9\u306e\u5165\u529b\u30df\u30b9\u3001\u53d7\u4fe1\u8005\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u5bb9\u91cf\u306e\u8d85\u904e\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u4e0d\u5177\u5408\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u8d85\u904e\u3001\u3042\u308b\u3044\u306f\u30b9\u30d1\u30e0\u5224\u5b9a\u306b\u3088\u308b\u62d2\u5426\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u5bfe\u5fdc\u3059\u308b\u969b\u306f\u3001\u307e\u305a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8a73\u7d30\u3092\u8aad\u307f\u53d6\u308a\u3001\u5177\u4f53\u7684\u306a\u539f\u56e0\u3092\u5207\u308a\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u8aa4\u3063\u305f\u5b9b\u5148\u3092\u4fee\u6b63\u3057\u3066\u518d\u9001\u4fe1\u3057\u305f\u308a\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u5727\u7e2e\u3057\u3066\u5bb9\u91cf\u3092\u6291\u3048\u308b\u3001\u3042\u308b\u3044\u306f\u76f8\u624b\u306b\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u6574\u7406\u3092\u4f9d\u983c\u3059\u308b\u306a\u3069\u306e\u884c\u52d5\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30a8\u30e9\u30fc\u304c\u7e70\u308a\u8fd4\u3055\u308c\u308b\u5834\u5408\u306f\u81ea\u793e\u306e\u9001\u4fe1\u74b0\u5883\u3084\u30b5\u30fc\u30d0\u8a2d\u5b9a\u306b\u554f\u984c\u304c\u306a\u3044\u304b\u3082\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u3084\u53d7\u4fe1\u8005\u5074\u306e\u62c5\u5f53\u8005\u306b\u76f8\u8ac7\u3059\u308b\u3053\u3068\u304c\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n<div class=\"box\">\n<div class=\"row\">\n<div class=\"col-md-3 col-sm-4 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/mail-delivery-system_solution\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/545_mainvisual.png\" alt=\"maildeliverysystem\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\uff1f\u5c4a\u304f\u7406\u7531\u3068\u5bfe\u51e6\u6cd5\u3092\u89e3\u8aac\" \/><\/a><\/div>\n<div class=\"col-md-9 col-sm-8 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/mail-delivery-system_solution\" target=\"_blank\" rel=\"noopener\"><strong>maildeliverysystem\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\uff1f\u5c4a\u304f\u7406\u7531\u3068\u5bfe\u51e6\u6cd5\u3092\u89e3\u8aac<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<h3>User unknown\uff1a\u5b9b\u5148\u30a2\u30c9\u30ec\u30b9\u306e\u8aa4\u308a\u3092\u4fee\u6b63\u3059\u308b<\/h3>\n<p>\u300cUser unknown\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u9001\u4fe1\u5148\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u5b9b\u5148\u306e\u30b9\u30da\u30eb\u30df\u30b9\u3084\u5165\u529b\u9593\u9055\u3044\u3001\u65e2\u306b\u524a\u9664\u3055\u308c\u305f\u30a2\u30ab\u30a6\u30f3\u30c8\u3078\u306e\u9001\u4fe1\u3001\u307e\u305f\u306f\u914d\u4fe1\u30ea\u30b9\u30c8\u306b\u8aa4\u3063\u3066\u767b\u9332\u3055\u308c\u305f\u7121\u52b9\u306a\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u304c\u4e3b\u306a\u539f\u56e0\u3067\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u3063\u3066\u306f\u300cRecipient address rejected: User unknown\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u3082\u3042\u308a\u3001\u3053\u3046\u3057\u305f\u5834\u5408\u306f\u53d7\u4fe1\u8005\u306e\u30b5\u30fc\u30d0\u304c\u8a72\u5f53\u30a2\u30c9\u30ec\u30b9\u3092\u8a8d\u8b58\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u89e3\u6c7a\u306b\u306f\u3001\u307e\u305a\u5b9b\u5148\u306e\u7db4\u308a\u3092\u6b63\u3057\u304f\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u7b2c\u4e00\u3067\u3059\u3002\u7279\u306b\u3001\u8a18\u53f7\u3084\u30c9\u30e1\u30a4\u30f3\u90e8\u5206\u306b\u8aa4\u308a\u304c\u306a\u3044\u304b\u3092\u7d30\u304b\u304f\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30e1\u30fc\u30eb\u30de\u30ac\u30b8\u30f3\u3084\u4e00\u6589\u914d\u4fe1\u306e\u969b\u306b\u306f\u3001\u53e4\u3044\u30a2\u30c9\u30ec\u30b9\u3084\u5b58\u5728\u3057\u306a\u3044\u30a2\u30c9\u30ec\u30b9\u3092\u30ea\u30b9\u30c8\u304b\u3089\u5b9a\u671f\u7684\u306b\u9664\u5916\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002\u53d7\u4fe1\u5074\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u8a2d\u5b9a\u304c\u5f71\u97ff\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308b\u305f\u3081\u3001\u76f8\u624b\u306b\u53d7\u4fe1\u8a31\u53ef\u3092\u4f9d\u983c\u3059\u308b\u3053\u3068\u3082\u6709\u52b9\u3067\u3059\u3002<\/p>\n<div class=\"box\">\n<div class=\"row\">\n<div class=\"col-md-3 col-sm-4 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/tools_invalid-email-address-detection\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/614_mainvisual.png\" alt=\"\u30e1\u30fc\u30eb\u4e0d\u9054\u306e\u539f\u56e0\u306f\u300c\u7121\u52b9\u30a2\u30c9\u30ec\u30b9\u300d\u304b\u3082\u22ef\u22ef\u6210\u679c\u3092\u6700\u5927\u5316\u3059\u308b\u30ea\u30b9\u30c8\u7ba1\u7406\u306e\u91cd\u8981\u6027\" \/><\/a><\/div>\n<div class=\"col-md-9 col-sm-8 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/tools_invalid-email-address-detection\" target=\"_blank\" rel=\"noopener\"><strong>\u30e1\u30fc\u30eb\u4e0d\u9054\u306e\u539f\u56e0\u306f\u300c\u7121\u52b9\u30a2\u30c9\u30ec\u30b9\u300d\u304b\u3082\u22ef\u22ef\u6210\u679c\u3092\u6700\u5927\u5316\u3059\u308b\u30ea\u30b9\u30c8\u7ba1\u7406\u306e\u91cd\u8981\u6027<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<h3>HOST unknown\uff1a\u30c9\u30e1\u30a4\u30f3\u540d\u306e\u8aa4\u308a\u3092\u4fee\u6b63\u3059\u308b<\/h3>\n<p>\u300cHOST unknown\u300d\u3084\u300cRecipient domain not found\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u306f\u3001\u5b9b\u5148\u30e1\u30fc\u30eb\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u5b58\u5728\u3057\u306a\u3044\u3001\u307e\u305f\u306fDNS\u3067\u89e3\u6c7a\u3067\u304d\u306a\u3044\u5834\u5408\u306b\u8fd4\u3055\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u300c@example.con\u300d\u306e\u3088\u3046\u306b\u7db4\u308a\u3092\u9593\u9055\u3048\u305f\u308a\u3001\u65e2\u306b\u4f7f\u308f\u308c\u306a\u304f\u306a\u3063\u305f\u30c9\u30e1\u30a4\u30f3\u3078\u9001\u4fe1\u3057\u305f\u3068\u304d\u306b\u8d77\u3053\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u53d7\u4fe1\u8005\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u304c\u505c\u6b62\u4e2d\u3001\u3042\u308b\u3044\u306fDNS\u8a2d\u5b9a\u306b\u4e0d\u5099\u304c\u3042\u308b\u5834\u5408\u306b\u3082\u540c\u69d8\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p>\u89e3\u6c7a\u306b\u306f\u3001\u307e\u305a\u81ea\u5206\u304c\u5165\u529b\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u306e\u6b63\u78ba\u6027\u3092\u78ba\u8a8d\u3057\u3001\u30bf\u30a4\u30d4\u30f3\u30b0\u30df\u30b9\u3092\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002\u6b63\u3057\u3044\u7db4\u308a\u3067\u3042\u308b\u306b\u3082\u95a2\u308f\u3089\u305a\u9001\u308c\u306a\u3044\u5834\u5408\u306f\u3001\u76f8\u624b\u306e\u30b5\u30fc\u30d0\u304c\u4e00\u6642\u7684\u306b\u4e0d\u5b89\u5b9a\u306a\u53ef\u80fd\u6027\u3082\u3042\u308b\u305f\u3081\u3001\u6642\u9593\u3092\u304a\u3044\u3066\u518d\u9001\u3059\u308b\u3053\u3068\u304c\u6709\u52b9\u3067\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u3082\u89e3\u6c7a\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u53d7\u4fe1\u8005\u306b\u9023\u7d61\u3057\u3066\u30c9\u30e1\u30a4\u30f3\u3084\u30e1\u30fc\u30eb\u74b0\u5883\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u3082\u3089\u3046\u306e\u304c\u9069\u5207\u3067\u3059\u3002\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u6b63\u78ba\u6027\u3068\u30c9\u30e1\u30a4\u30f3\u306e\u6709\u52b9\u6027\u3092\u5e38\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u3046\u3057\u305f\u30c8\u30e9\u30d6\u30eb\u306f\u672a\u7136\u306b\u9632\u3052\u307e\u3059\u3002<\/p>\n<h3>Message content rejected\uff1a\u30b9\u30d1\u30e0\u5224\u5b9a\u3092\u56de\u907f\u3059\u308b<\/h3>\n<p>\u300cMessage content rejected\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u306f\u3001\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u5185\u5bb9\u304c\u53d7\u4fe1\u5074\u306e\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u308a\u30b9\u30d1\u30e0\u3068\u5224\u5b9a\u3055\u308c\u3001\u62d2\u5426\u3055\u308c\u305f\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u672c\u6587\u306b\u4e0d\u81ea\u7136\u306a\u8868\u73fe\u304c\u542b\u307e\u308c\u3066\u3044\u305f\u308a\u3001\u30ea\u30f3\u30af\u304c\u904e\u5270\u306b\u591a\u3044\u3001\u7279\u5b9a\u306e\u7981\u6b62\u30ef\u30fc\u30c9\u3092\u542b\u3093\u3067\u3044\u308b\u3001\u3042\u308b\u3044\u306f\u904e\u53bb\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u5224\u5b9a\u3055\u308c\u305f\u9001\u4fe1\u5143\u304b\u3089\u9001\u4fe1\u3057\u3066\u3044\u308b\u306a\u3069\u304c\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3046\u3057\u305f\u5834\u5408\u3001\u307e\u305a\u30e1\u30fc\u30eb\u672c\u6587\u3092\u898b\u76f4\u3057\u3001\u5ba3\u4f1d\u8272\u304c\u5f37\u3059\u304e\u306a\u3044\u304b\u3001\u4ef6\u540d\u306b\u4e0d\u5be9\u306a\u5358\u8a9e\u3092\u542b\u3093\u3067\u3044\u306a\u3044\u304b\u3001\u753b\u50cf\u3084\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u304c\u904e\u5ea6\u3067\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3055\u3089\u306b\u3001\u77ed\u6642\u9593\u306b\u5927\u91cf\u306e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3068\u30d6\u30ed\u30c3\u30af\u5bfe\u8c61\u306b\u306a\u308a\u3084\u3059\u3044\u305f\u3081\u3001\u9001\u4fe1\u9593\u9694\u3084\u4ef6\u6570\u3092\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u52a0\u3048\u3066\u3001<a href=\"https:\/\/www.synergy-marketing.co.jp\/glossary\/spf\/\" target=\"_blank\" rel=\"noopener\">SPF<\/a>\u3084<a href=\"https:\/\/www.synergy-marketing.co.jp\/glossary\/dkim\/\" target=\"_blank\" rel=\"noopener\">DKIM<\/a>\u3001<a href=\"https:\/\/www.synergy-marketing.co.jp\/glossary\/dmarc\/\" target=\"_blank\" rel=\"noopener\">DMARC<\/a>\u3068\u3044\u3063\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u53d7\u4fe1\u5074\u306b\u6b63\u5f53\u306a\u9001\u4fe1\u3067\u3042\u308b\u3053\u3068\u3092\u8a3c\u660e\u3057\u3001\u30b9\u30d1\u30e0\u5224\u5b9a\u306e\u30ea\u30b9\u30af\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>Storage quota exceeded\uff1a\u53d7\u4fe1\u8005\u306e\u5bb9\u91cf\u8d85\u904e\u306b\u5bfe\u5fdc\u3059\u308b<\/h3>\n<p>\u300cStorage quota exceeded\u300d\u3084\u300cMailbox full\u300d\u3068\u3044\u3063\u305f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u53d7\u4fe1\u8005\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c\u5bb9\u91cf\u306e\u4e0a\u9650\u306b\u9054\u3057\u3066\u3044\u308b\u305f\u3081\u65b0\u3057\u3044\u30e1\u30fc\u30eb\u3092\u53d7\u3051\u4ed8\u3051\u3089\u308c\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u5834\u5408\u3001\u9001\u4fe1\u5074\u3067\u4fee\u6b63\u3067\u304d\u308b\u90e8\u5206\u306f\u307b\u3068\u3093\u3069\u306a\u304f\u3001\u53d7\u4fe1\u8005\u304c\u4e0d\u8981\u306a\u30e1\u30fc\u30eb\u3092\u524a\u9664\u3057\u305f\u308a\u5bb9\u91cf\u3092\u62e1\u5f35\u3057\u306a\u3044\u9650\u308a\u30e1\u30fc\u30eb\u306f\u5c4a\u304d\u307e\u305b\u3093\u3002\u7279\u306b\u6cd5\u4eba\u30e1\u30fc\u30eb\u3084\u7121\u6599\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001\u5bb9\u91cf\u5236\u9650\u304c\u53b3\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3082\u591a\u304f\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3080\u5927\u304d\u306a\u30e1\u30fc\u30eb\u306f\u3059\u3050\u306b\u4e0a\u9650\u3092\u8d85\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u9001\u4fe1\u8005\u3068\u3057\u3066\u3067\u304d\u308b\u3053\u3068\u306f\u3001\u3057\u3070\u3089\u304f\u6642\u9593\u3092\u304a\u3044\u3066\u518d\u9001\u3092\u8a66\u307f\u308b\u304b\u3001\u5225\u306e\u9023\u7d61\u624b\u6bb5\u3092\u5229\u7528\u3057\u3066\u76f8\u624b\u306b\u5bb9\u91cf\u4e0d\u8db3\u3092\u77e5\u3089\u305b\u308b\u3053\u3068\u3067\u3059\u3002\u91cd\u8981\u306a\u30e1\u30fc\u30eb\u3067\u3042\u308c\u3070\u3001\u96fb\u8a71\u3084\u30c1\u30e3\u30c3\u30c8\u306a\u3069\u5225\u7d4c\u8def\u3067\u306e\u9023\u7d61\u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u304c\u671b\u307e\u3057\u304f\u3001\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u304b\u3063\u305f\u7406\u7531\u3092\u4f1d\u3048\u308b\u3053\u3068\u3067\u76f8\u624b\u306b\u65e9\u6025\u306a\u5bfe\u5fdc\u3092\u4fc3\u3059\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>Message size exceeds\uff1a\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u898b\u76f4\u3059<\/h3>\n<p>\u300cMessage size exceeds limit\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u306f\u3001\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u30b5\u30a4\u30ba\u304c\u9001\u4fe1\u5074\u307e\u305f\u306f\u53d7\u4fe1\u5074\u306e\u30b5\u30fc\u30d0\u3067\u8a2d\u5b9a\u3055\u308c\u305f\u4e0a\u9650\u3092\u8d85\u3048\u3066\u3057\u307e\u3063\u305f\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u591a\u304f\u306e\u30e1\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u6570MB\u304b\u3089\u6570\u5341MB\u306e\u5236\u9650\u304c\u3042\u308a\u3001\u5927\u5bb9\u91cf\u306e\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u305d\u306e\u307e\u307e\u9001\u308b\u3068\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u89e3\u6c7a\u306e\u305f\u3081\u306b\u306f\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u5727\u7e2e\u3057\u305f\u308a\u3001\u8907\u6570\u306e\u30e1\u30fc\u30eb\u306b\u5206\u5272\u3057\u3066\u9001\u4fe1\u3059\u308b\u3001\u3042\u308b\u3044\u306f\u30af\u30e9\u30a6\u30c9\u30b9\u30c8\u30ec\u30fc\u30b8\u3084\u30aa\u30f3\u30e9\u30a4\u30f3\u5171\u6709\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u6709\u52b9\u3067\u3059\u3002\u307e\u305f\u3001\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\u306b\u3088\u3063\u3066\u306f\u5727\u7e2e\u7387\u304c\u4f4e\u304f\u306a\u308b\u5834\u5408\u3082\u3042\u308b\u305f\u3081\u3001\u4e0d\u8981\u306a\u753b\u50cf\u3084\u4f59\u5206\u306a\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3057\u3001\u5bb9\u91cf\u3092\u3067\u304d\u308b\u3060\u3051\u6291\u3048\u308b\u5de5\u592b\u3082\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3>Badrcptto list\uff1a\u53d7\u4fe1\u62d2\u5426\u3078\u306e\u5bfe\u51e6\u3092\u884c\u3046<\/h3>\n<p>\u300cYour envelope recipient is in my badrcptto list\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u53d7\u4fe1\u8005\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u304c\u7279\u5b9a\u306e\u9001\u4fe1\u8005\u3084\u30c9\u30e1\u30a4\u30f3\u3092\u62d2\u5426\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3057\u3066\u3044\u308b\u305f\u3081\u306b\u914d\u4fe1\u304c\u62d2\u5426\u3055\u308c\u305f\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>\u53d7\u4fe1\u8005\u81ea\u8eab\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u5bfe\u7b56\u3068\u3057\u3066\u9001\u4fe1\u5143\u3092\u62d2\u5426\u3057\u3066\u3044\u308b\u5834\u5408\u3084\u3001\u30b5\u30fc\u30d0\u7ba1\u7406\u8005\u304c\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u306f\u3001\u9001\u4fe1\u8005\u5074\u3067\u7121\u7406\u306b\u518d\u9001\u3057\u3066\u3082\u7d50\u679c\u306f\u5909\u308f\u3089\u305a\u3001\u914d\u4fe1\u3092\u7d9a\u3051\u308b\u3053\u3068\u3067\u9006\u306b\u30b9\u30d1\u30e0\u6271\u3044\u3055\u308c\u308b\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u306f\u3001\u307e\u305a\u8a72\u5f53\u30a2\u30c9\u30ec\u30b9\u3092\u914d\u4fe1\u30ea\u30b9\u30c8\u304b\u3089\u9664\u5916\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u53d7\u4fe1\u8005\u306b\u9023\u7d61\u3092\u53d6\u308a\u3001\u62d2\u5426\u8a2d\u5b9a\u306e\u89e3\u9664\u3084\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u767b\u9332\u3092\u4f9d\u983c\u3059\u308b\u3053\u3068\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u307e\u305f\u3001\u30e1\u30fc\u30eb\u306e\u5185\u5bb9\u3084\u914d\u4fe1\u983b\u5ea6\u3092\u898b\u76f4\u3057\u3001\u53d7\u4fe1\u8005\u306b\u3068\u3063\u3066\u4fa1\u5024\u306e\u3042\u308b\u60c5\u5831\u63d0\u4f9b\u3092\u5fc3\u304c\u3051\u308b\u3053\u3068\u304c\u3001\u4fe1\u983c\u3092\u56de\u5fa9\u3057\u3001\u518d\u3073\u6b63\u5e38\u306b\u3084\u308a\u53d6\u308a\u3092\u884c\u3046\u305f\u3081\u306e\u6709\u52b9\u306a\u624b\u6bb5\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30a8\u30e9\u30fc\u3092\u9632\u6b62\u3059\u308b\u306b\u306f<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_image02.png\" alt=\"\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30a8\u30e9\u30fc\u3092\u9632\u6b62\u3059\u308b\u306b\u306f\" width=\"750\" height=\"456\" class=\"alignnone size-full wp-image-20720\" srcset=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_image02.png 750w, https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/627_image02-230x140.png 230w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<p>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u591a\u304f\u306f\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3084\u8a2d\u5b9a\u304c\u539f\u56e0\u3067\u3059\u3002\u7279\u306b\u3001SMTP\u3084IMAP\u3068\u3044\u3063\u305f\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7406\u89e3\u4e0d\u8db3\u3084\u3001\u8a8d\u8a3c\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u306e\u4e0d\u5099\u304c\u539f\u56e0\u3068\u306a\u308b\u30b1\u30fc\u30b9\u306f\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30a8\u30e9\u30fc\u3092\u9632\u3050\u305f\u3081\u306b\u62bc\u3055\u3048\u3066\u304a\u304f\u3079\u304d\u57fa\u672c\u3068\u5b9f\u8df5\u7684\u306a\u5bfe\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>SMTP\u30fbPOP\u30fbIMAP\u30b5\u30fc\u30d0\u306e\u5f79\u5272\u3092\u7406\u89e3\u3059\u308b<\/h3>\n<p>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30a8\u30e9\u30fc\u3092\u9632\u3050\u306b\u306f\u3001\u30e1\u30fc\u30eb\u304c\u3069\u306e\u3088\u3046\u306b\u9001\u53d7\u4fe1\u3055\u308c\u308b\u304b\u306e\u57fa\u672c\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u30fbSMTP\u30b5\u30fc\u30d0\uff1a\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u30fb\u8ee2\u9001\u3059\u308b\u305f\u3081\u306e\u30b5\u30fc\u30d0\u3067\u3059\u3002\u3053\u3053\u3067\u306e\u8a8d\u8a3c\u8a2d\u5b9a\u306e\u4e0d\u5099\u306a\u3069\u304c\u3001\u9001\u4fe1\u30a8\u30e9\u30fc\u306e\u76f4\u63a5\u7684\u306a\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\u30fbPOP\uff0fIMAP\u30b5\u30fc\u30d0\uff1a\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u305f\u3081\u306e\u30b5\u30fc\u30d0\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u53d7\u4fe1\u5074\u306e\u4ed5\u7d44\u307f\u3067\u3059\u304c\u3001\u5168\u4f53\u50cf\u3092\u628a\u63e1\u3057\u3066\u304a\u304f\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>\u7279\u306b\u3001\u30e1\u30fc\u30eb\u3092\u78ba\u5b9f\u306b\u5c4a\u3051\u308b\u305f\u3081\u306b\u306f\u3001\u9001\u4fe1\u3092\u62c5\u3046SMTP\u30b5\u30fc\u30d0\u306e\u5f79\u5272\u3068\u8a2d\u5b9a\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u9001\u53d7\u4fe1\u306e\u4ed5\u7d44\u307f\u3092\u62bc\u3055\u3048\u308b<\/h3>\n<p>\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u3066\u304b\u3089\u53d7\u4fe1\u3055\u308c\u308b\u307e\u3067\u306b\u306f\u3001\u9001\u4fe1\u5074\u2192SMTP\u30b5\u30fc\u30d0\u2192DNS\uff08MX\u30ec\u30b3\u30fc\u30c9\u53c2\u7167\uff09\u2192\u53d7\u4fe1\u5074SMTP\u30b5\u30fc\u30d0\u3068\u30eb\u30fc\u30c8\u304c\u78ba\u7acb\u3055\u308c\u3001\u305d\u306e\u5f8cPOP3\u3084IMAP\u3092\u7528\u3044\u3066\u30a8\u30f3\u30c9\u30e6\u30fc\u30b6\u30fc\u306e\u7aef\u672b\u306b\u914d\u4fe1\u3055\u308c\u307e\u3059\u3002SMTP\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u8ee2\u9001\u3092\u62c5\u5f53\u3057\u3001Queue\u306b\u3088\u308b\u518d\u9001\u3084\u8a8d\u8a3c\u6a5f\u69cb\u3092\u901a\u3058\u3001\u78ba\u5b9f\u306a\u914d\u4fe1\u3092\u652f\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u3046\u3057\u305f\u4e00\u9023\u306e\u30d5\u30ed\u30fc\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u767a\u751f\u6642\u306b\u306f\u3069\u306e\u6bb5\u968e\u3067\u969c\u5bb3\u304c\u8d77\u304d\u3066\u3044\u308b\u306e\u304b\u3092\u8fc5\u901f\u306b\u8b58\u5225\u30fb\u89e3\u6790\u3067\u304d\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u52b9\u7387\u5316\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u9001\u53d7\u4fe1\u306e\u4ed5\u7d44\u307f\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u30ed\u30b0\u3084\u63a5\u7d9a\u8a2d\u5b9a\u306e\u898b\u76f4\u3057\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u969c\u5bb3\u5bfe\u5fdc\u3084\u904b\u7528\u6539\u5584\u306b\u3064\u306a\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n<h3>\u30a8\u30e9\u30fc\u3092\u672a\u7136\u306b\u9632\u3050\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\uff08SPF\u30fbDKIM\u30fbDMARC\uff09\u3092\u884c\u3046<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/601_image02.png\" alt=\"DMARC\u3092\u652f\u3048\u308bSPF\u3068DKIM\u306e\u4ed5\u7d44\u307f\u56f3\u89e3\u3002SPF\u306eIP\u78ba\u8a8d\u3068DKIM\u306e\u7f72\u540d\u691c\u8a3c\u306e\u7d50\u679c\u306b\u57fa\u3065\u304d\u3001DMARC\u304c\u76e3\u8996\u30fb\u9694\u96e2\u30fb\u62d2\u5426\u3092\u5224\u65ad\u3059\u308b\u6d41\u308c\" width=\"750\" height=\"541\" class=\"alignnone size-full wp-image-20340\" srcset=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/601_image02.png 750w, https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/601_image02-194x140.png 194w, https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/601_image02-638x460.png 638w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<p>SPF\u306f\u3001\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u304c\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u306b\u8a8d\u53ef\u3055\u308c\u305f\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u3092DNS\u30ec\u30b3\u30fc\u30c9\u3067\u660e\u793a\u3057\u3001\u306a\u308a\u3059\u307e\u3057\u9001\u4fe1\u3092\u9632\u304e\u307e\u3059\u3002DKIM\u306f\u3001\u30e1\u30fc\u30eb\u672c\u6587\u3084\u30d8\u30c3\u30c0\u30fc\u306b\u30c7\u30b8\u30bf\u30eb\u7f72\u540d\u3092\u4ed8\u4e0e\u3057\u3001\u9001\u4fe1\u9014\u4e2d\u306e\u6539\u3056\u3093\u9632\u6b62\u3068\u30c9\u30e1\u30a4\u30f3\u6b63\u5f53\u6027\u306e\u4fdd\u8a3c\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>DMARC\u306f\u3001SPF\u3084DKIM\u306b\u52a0\u3048\u3066\u300cFrom:\u300d\u30a2\u30c9\u30ec\u30b9\u306e\u6574\u5408\u6027\u3092\u691c\u8a3c\u3057\u3001\u4e0d\u6b63\u306a\u5834\u5408\u306f\u53d7\u4fe1\u62d2\u5426\u3084\u9694\u96e2\u306a\u3069\u306e\u51e6\u7406\u3092\u53d7\u4fe1\u5074\u306b\u6307\u793a\u3067\u304d\u3001\u3055\u3089\u306b\u30ec\u30dd\u30fc\u30c8\u3082\u53d7\u4fe1\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u3092\u9069\u5207\u306b\u8a2d\u5b9a\uff08DNS\u306bTXT\u30ec\u30b3\u30fc\u30c9\u8a2d\u7f6e\u30fb\u7f72\u540d\u9375\u306e\u7ba1\u7406\uff09\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30d1\u30e0\u3084\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u9632\u6b62\u3068\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u5411\u4e0a\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u53c2\u8003\u8a18\u4e8b\uff1a<a href=\"https:\/\/www.synergy-marketing.co.jp\/cloud\/synergylead\/support\/faq-mail-senderid-spf\/\" target=\"_blank\" rel=\"noopener\">SPF\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/a><\/p>\n<p>\u53c2\u8003\u8a18\u4e8b\uff1a<a href=\"https:\/\/www.synergy-marketing.co.jp\/cloud\/synergylead\/support\/faq-mail-what-is-dkim\/\" target=\"_blank\" rel=\"noopener\">DKIM\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/a><\/p>\n<p>\u53c2\u8003\u8a18\u4e8b\uff1a<a href=\"https:\/\/www.synergy-marketing.co.jp\/cloud\/synergylead\/support\/faq-mail-what-is-dmarc\/\" target=\"_blank\" rel=\"noopener\">DMARC\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/a><\/p>\n<h3>\u5b9a\u671f\u7684\u306b\u30ed\u30b0\u3084\u914d\u4fe1\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u30e1\u30fc\u30eb\u9001\u4fe1\u30fb\u914d\u4fe1\u306e\u4fe1\u983c\u6027\u3092\u7dad\u6301\u3059\u308b\u306b\u306f\u3001\u30b5\u30fc\u30d0\u3084\u914d\u4fe1\u30c4\u30fc\u30eb\u304c\u51fa\u529b\u3059\u308b\u30ed\u30b0\u3084\u914d\u4fe1\u30ec\u30dd\u30fc\u30c8\u3092\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30e1\u30fc\u30eb\u306e\u30a8\u30e9\u30fc\u7406\u7531\uff08\u8a8d\u8a3c\u5931\u6557\u3001\u5230\u9054\u5148\u62d2\u5426\u3001\u30ad\u30e5\u30fc\u306e\u6ede\u7559\u306a\u3069\uff09\u306f\u30ed\u30b0\u306b\u8a18\u9332\u3055\u308c\u3066\u304a\u308a\u3001\u65e9\u671f\u306b\u7570\u5e38\u3092\u691c\u51fa\u3059\u308b\u304d\u3063\u304b\u3051\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u7279\u306bDMARC\u3067\u306f\u3001\u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\uff08\u5230\u9054\u3057\u305f\u30fb\u9694\u96e2\u3055\u308c\u305f\u30fb\u62d2\u5426\u3055\u308c\u305f\u30e1\u30fc\u30eb\uff09\u306e\u60c5\u5831\u304cDNS\u7d4c\u7531\u3067\u9001\u3089\u308c\u3066\u304d\u3066\u3001\u914d\u4fe1\u54c1\u8cea\u306e\u50be\u5411\u628a\u63e1\u3084\u8a2d\u5b9a\u898b\u76f4\u3057\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3055\u3089\u306b\u3001BCC\u901a\u77e5\u3084\u914d\u4fe1\u5c65\u6b74\u306a\u3069\u306e\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001\u5b9f\u969b\u306b\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u305f\u308a\u3001\u7570\u5e38\u9001\u4fe1\u306e\u7279\u5b9a\u306b\u3082\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n<h3>\u914d\u4fe1\u30c4\u30fc\u30eb\u3084\u30ea\u30ec\u30fc\u30b5\u30fc\u30d3\u30b9\u3092\u6d3b\u7528\u3059\u308b<\/h3>\n<p>\u5927\u91cf\u914d\u4fe1\u3084\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb\u306a\u3069\u306e\u76ee\u7684\u3067\u30e1\u30fc\u30eb\u3092\u9001\u308b\u969b\u306b\u306f\u3001\u81ea\u793e\u30b5\u30fc\u30d0\u3060\u3051\u3067\u306a\u304f\u3001\u5c02\u9580\u306e\u914d\u4fe1\u30c4\u30fc\u30eb\u30fb\u30e1\u30fc\u30eb\u30ea\u30ec\u30fc\u30b5\u30fc\u30d3\u30b9\uff08\u30e1\u30fc\u30eb\u9001\u4fe1\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\uff09\u3092\u6d3b\u7528\u3059\u308b\u3068\u52b9\u679c\u7684\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u9001\u4fe1\u30a4\u30f3\u30d5\u30e9\u30fb\u8a8d\u8a3c\u8a2d\u5b9a\uff08SPF\uff0fDKIM\uff0fDMARC\uff09\u30fb\u914d\u4fe1\u30ec\u30dd\u30fc\u30c8\u30fb\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306a\u3069\u3092\u5305\u62ec\u3059\u308b\u6a5f\u80fd\u3092\u5099\u3048\u3066\u304a\u308a\u3001\u5230\u9054\u7387\u5411\u4e0a\u3068\u904b\u7528\u52b9\u7387\u5316\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u5916\u90e8\u30ea\u30ec\u30fc\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u53ef\u7528\u6027\u306e\u9ad8\u3044\u30a4\u30f3\u30d5\u30e9\u3092\u5229\u7528\u3067\u304d\u3001\u30e1\u30fc\u30eb\u304c\u30b9\u30d1\u30e0\u6271\u3044\u3055\u308c\u306b\u304f\u304f\u306a\u308b\u70b9\u3082\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u3002\u3053\u3046\u3057\u305f\u30c4\u30fc\u30eb\u30fb\u30b5\u30fc\u30d3\u30b9\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u6a5f\u80fd\u3092\u5f37\u5316\u3057\u306a\u304c\u3089\u5b89\u5168\u304b\u3064\u9ad8\u78ba\u7387\u3067\u914d\u4fe1\u3067\u304d\u308b\u4f53\u5236\u304c\u6574\u3044\u307e\u3059\u3002<\/p>\n<div class=\"box\">\n<div class=\"row\">\n<div class=\"col-md-3 col-sm-4 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/mail-delivery-system_casestudy\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/www.synergy-marketing.co.jp\/blog\/wp\/wp-content\/uploads\/504_mainvisual.png\" alt=\"\u30e1\u30fc\u30eb\u914d\u4fe1\u30c4\u30fc\u30eb\u306e\u5c0e\u5165\u4e8b\u4f8b5\u9078\uff01\u30c4\u30fc\u30eb\u306e\u7a2e\u985e\u3084\u30e1\u30fc\u30eb\u914d\u4fe1\u3092\u6210\u529f\u3055\u305b\u308b\u30dd\u30a4\u30f3\u30c8\u306a\u3069\u3082\u89e3\u8aac\" \/><\/a><\/div>\n<div class=\"col-md-9 col-sm-8 col-xs-6\"><a href=\"https:\/\/www.synergy-marketing.co.jp\/blog\/mail-delivery-system_casestudy\" target=\"_blank\" rel=\"noopener\"><strong>\u30e1\u30fc\u30eb\u914d\u4fe1\u30c4\u30fc\u30eb\u306e\u5c0e\u5165\u4e8b\u4f8b5\u9078\uff01\u30c4\u30fc\u30eb\u306e\u7a2e\u985e\u3084\u30e1\u30fc\u30eb\u914d\u4fe1\u3092\u6210\u529f\u3055\u305b\u308b\u30dd\u30a4\u30f3\u30c8\u306a\u3069\u3082\u89e3\u8aac<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u306e\u767a\u751f\u306f\u3001\u5358\u306a\u308b\u914d\u4fe1\u30c8\u30e9\u30d6\u30eb\u3067\u306f\u306a\u304f\u3001\u5230\u9054\u7387\u3084\u30d6\u30e9\u30f3\u30c9\u4fe1\u983c\u6027\u3001\u3055\u3089\u306b\u306f\u30b3\u30b9\u30c8\u306b\u3082\u5f71\u97ff\u3092\u53ca\u307c\u3059\u91cd\u8981\u306a\u8ab2\u984c\u3067\u3059\u3002\u653e\u7f6e\u3059\u308c\u3070IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f4e\u4e0b\u3084\u30b9\u30d1\u30e0\u5224\u5b9a\u306a\u3069\u3001\u5168\u4f53\u306e\u914d\u4fe1\u54c1\u8cea\u3092\u4e0b\u3052\u308b\u539f\u56e0\u306b\u306a\u308a\u304b\u306d\u307e\u305b\u3093\u3002\u539f\u56e0\u3092\u6b63\u3057\u304f\u5206\u6790\u3057\u3001\u5b9a\u671f\u7684\u306b\u30ea\u30b9\u30c8\u3092\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3059\u308b\u3053\u3068\u304c\u3001\u5b89\u5b9a\u3057\u305f\u30e1\u30fc\u30eb\u914d\u4fe1\u306e\u7b2c\u4e00\u6b69\u3067\u3059\u3002<\/p>\n<p>\u305d\u306e\u3046\u3048\u3067\u3001SPF\u30fbDKIM\u30fbDMARC\u3068\u3044\u3063\u305f\u8a8d\u8a3c\u8a2d\u5b9a\u3084\u30ed\u30b0\u78ba\u8a8d\u306a\u3069\u3001\u65e5\u3005\u306e\u904b\u7528\u7ba1\u7406\u3092\u5fb9\u5e95\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3068\u306f\u3044\u3048\u3001\u624b\u52d5\u3067\u306e\u5bfe\u5fdc\u306b\u306f\u9650\u754c\u304c\u3042\u308a\u3001\u7279\u306b\u5927\u91cf\u914d\u4fe1\u3084\u30bb\u30b0\u30e1\u30f3\u30c8\u5225\u914d\u4fe1\u3092\u884c\u3046\u5834\u5408\u306f\u3001\u30c4\u30fc\u30eb\u306b\u3088\u308b\u81ea\u52d5\u5316\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002<\/p>\n<p>\u30b7\u30ca\u30b8\u30fc\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u304c\u63d0\u4f9b\u3059\u308b\u300cSynergy!\u300d\u306f\u3001\u8a8d\u8a3c\u8a2d\u5b9a\u652f\u63f4\u3084\u914d\u4fe1\u30ec\u30dd\u30fc\u30c8\u306e\u53ef\u8996\u5316\u306a\u3069\u3001\u5b89\u5b9a\u3057\u305f\u30e1\u30fc\u30eb\u914d\u4fe1\u3092\u652f\u3048\u308b\u4ed5\u7d44\u307f\u3092\u6a19\u6e96\u642d\u8f09\u3057\u3066\u3044\u307e\u3059\u3002\u30a8\u30e9\u30fc\u5bfe\u7b56\u3084\u914d\u4fe1\u54c1\u8cea\u306e\u5411\u4e0a\u306b\u8ab2\u984c\u3092\u611f\u3058\u3066\u3044\u308b\u65b9\u306f\u3001\u305c\u3072\u304a\u6c17\u8efd\u306b\u3054\u76f8\u8ac7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><a href=\"https:\/\/form.synergy-marketing.co.jp\/webapp\/form\/18784_mubb_8\/index.do\" target=\"_blank\" rel=\"noopener\">\u304a\u554f\u3044\u5408\u308f\u305b\u306f\u3053\u3061\u3089<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&lt;\u3053\u306e\u8a18\u4e8b\u3067\u308f\u304b\u308b\u3053\u3068&gt; \u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u306e\u653e\u7f6e\u304c\u3001\u306a\u305c\u4f01\u696d\u306e\u6a5f\u4f1a\u640d\u5931\u3084\u4fe1\u983c\u4f4e\u4e0b\u306b\u3064\u306a\u304c\u308b\u306e\u304b\u3001\u305d\u306e\u7406\u7531\u304c\u308f\u304b\u308a\u307e\u3059\u3002 \u300cUser unknown\u300d\u306a\u3069\u3001\u62c5\u5f53\u8005\u304c\u3088\u304f\u76ee\u306b\u3059\u308b\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u610f\u5473\u3068\u539f\u56e0\u3001&#8230;<\/p>\n","protected":false},"author":83,"featured_media":20718,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-20723","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mail-marketing"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/posts\/20723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/users\/83"}],"replies":[{"embeddable":true,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/comments?post=20723"}],"version-history":[{"count":5,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/posts\/20723\/revisions"}],"predecessor-version":[{"id":20729,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/posts\/20723\/revisions\/20729"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/media\/20718"}],"wp:attachment":[{"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/media?parent=20723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/categories?post=20723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.synergy-marketing.co.jp\/blog\/wp-json\/wp\/v2\/tags?post=20723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}