{"id":15056,"date":"2024-03-27T09:00:36","date_gmt":"2024-03-27T00:00:36","guid":{"rendered":"https:\/\/blastmail.jp\/blog\/?p=15056"},"modified":"2025-03-19T19:37:16","modified_gmt":"2025-03-19T10:37:16","slug":"yahoo-guideline","status":"publish","type":"post","link":"https:\/\/blastmail.jp\/blog\/spam\/yahoo-guideline","title":{"rendered":"\u7c73\u30e4\u30d5\u30fc\u3067\u306f\u300c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u306e\u66f4\u65b0\u304c\u5b8c\u4e86\uff01\u56fd\u5185\u306e\u30e4\u30d5\u30fc\u30e1\u30fc\u30eb\u306f\u4eca\u5f8c\u3069\u3046\u306a\u308b\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-15058\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/yahoo-guideline.png\" alt=\"\" width=\"640\" height=\"360\" \/><\/p>\n<p>Google\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u6e1b\u5c11\u3092\u76ee\u7684\u306b2024\u5e742\u6708\u304b\u3089\u65bd\u884c\u3057\u305f\u300c<a href=\"https:\/\/support.google.com\/a\/answer\/81126\">\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/a>\u300d\u306f\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306b\u9ad8\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\u3092\u6c42\u3081\u308b\u5185\u5bb9\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u95a2\u9023\u8a18\u4e8b\uff1a<a href=\"https:\/\/blastmail.jp\/blog\/spam\/gmail-guideline-202402\">\u3010\u89e3\u6c7a\u7b56\u30112024\u5e742\u6708\u3088\u308aGmail\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u304c\u5909\u66f4\uff011\u65e55000\u4ef6\u4ee5\u4e0a\u306e\u914d\u4fe1\u306f\u5bfe\u5fdc\u5fc5\u9808\uff01<\/a><\/p>\n<p><strong>\u5927\u91cf\u9001\u4fe1\u8005\u306b\u5411\u3051\u305f\u6539\u8a02<\/strong>\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u4ed6\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u767a\u8868\u3057\u3066\u3044\u308b\u3082\u306e\u3068\u6bd4\u8f03\u3057\u3066\u3082\u30cf\u30fc\u30c9\u30eb\u304c\u9ad8\u3044\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3057\u304b\u3057\u4eca\u5f8c\u3001<strong>Gmail\u4ee5\u5916\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8<\/strong>\u3082\u4e0a\u8a18\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u8ffd\u968f\u3059\u308b\u5f62\u3067\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u66f4\u65b0\u3057\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u64b2\u6ec5\u3092\u76ee\u6307\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u65e5\u672c\u56fd\u5185\u306e\u30e1\u30fc\u30e9\u30fc\u30b7\u30a7\u30a2\u30e9\u30f3\u30ad\u30f3\u30b0\u3067\u4e0a\u4f4d\u306b\u5165\u308b<strong>\u300cYahoo!\u30e1\u30fc\u30eb\u300d<\/strong>\u3082\u305d\u306e\u4e2d\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n<p>\u53c2\u8003\u8a18\u4e8b\uff1a<a href=\"https:\/\/vibetrace.com\/ja\/%E9%9B%BB%E5%AD%90%E3%83%A1%E3%83%BC%E3%83%AB%E3%82%AF%E3%83%A9%E3%82%A4%E3%82%A2%E3%83%B3%E3%83%88%E3%81%AE%E4%BD%BF%E7%94%A8%E7%8A%B6%E6%B3%81%E7%B5%B1%E8%A8%88-2023\/\">\u6700\u65b0\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u7d71\u8a08\u3068\u50be\u5411 [2023 \u5e74]<\/a><\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u5909\u5316\u3059\u308b\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u74b0\u5883\u306b\u5bfe\u3057\u3066\u300cYahoo!\u30e1\u30fc\u30eb\u300d\u306f\u4eca\u5f8c\u3069\u306e\u3088\u3046\u306a\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u767a\u8868\u3057\u3066\u884c\u304f\u304b\u306b\u6ce8\u76ee\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Yahoo!\u30e1\u30fc\u30eb\u306e\u5229\u7528\u8005\u306f\u3082\u3061\u308d\u3093\u3001\u30e1\u30fc\u30e9\u30fc\uff08\u30a6\u30a7\u30d6\u30e1\u30fc\u30eb\uff09\u3092\u4f7f\u3046\u6a5f\u4f1a\u304c\u3042\u308b\u65b9\u306f\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u30102025\u5e743\u6708\u6700\u65b0\u901f\u5831\u3011Yahoo!\u30e1\u30fc\u30eb\u3082\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30f3\u3092\u66f4\u65b0\uff01<\/h3>\n<p>Yahoo Japan\u306f2024\u5e7412\u6708\u304b\u30892025\u5e74\u306b\u304b\u3051\u3066\u3001DMARC\u3068\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u30e6\u30fc\u30b6\u30fc\u306b\u7fa9\u52d9\u4ed8\u3051\u308b\u65e8\u3092\u767a\u8868\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u5185\u5bb9\u3068\u3057\u3066\u306fGmail\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3068\u540c\u69d8\u306b\u3001\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u306e\u300cSPF\u30ec\u30b3\u30fc\u30c9\u300d\u300cDKIM\u8a2d\u5b9a\u300d\u300cDMARC\u8a2d\u5b9a\u300d\u3092\u7fa9\u52d9\u4ed8\u3051\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u4eca\u5f8c\u3053\u308c\u3089\u3092\u6e80\u305f\u3055\u306a\u3044\u30e1\u30fc\u30eb\u306f\u3001Gmail\u306e\u307f\u306a\u3089\u305aYahoo\u30e1\u30fc\u30eb\u306e\u53d7\u4fe1\u7bb1\u306b\u3082\u5c4a\u304b\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u53c2\u8003\u8a18\u4e8b\uff1a<a href=\"https:\/\/securityboulevard.com\/2025\/01\/yahoo-japan-enforces-dmarc-adoption-for-users-in-2025\/\" target=\"_blank\" rel=\"noopener\">Yahoo Japan Enforces DMARC Adoption for Users in 2025<\/a><\/p>\n<h2>\u30e4\u30d5\u30fc\u3082\u66f4\u65b0\uff01\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u6982\u8981<\/h2>\n<p>\u30e4\u30d5\u30fc\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u66f4\u65b0\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308bGmail\u306e<strong>\u300c\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d<\/strong>\u306f\u3069\u306e\u3088\u3046\u306a\u8981\u4ef6\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u4e0a\u8a18\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306f\u3001\u5f8c\u8ff0\u3059\u308b\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u9001\u4fe1\u8005\u304c\u914d\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306f\u53d7\u4fe1\u30dc\u30c3\u30af\u30b9\u306b\u5206\u985e\u3055\u308c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u3092\u793a\u5506\u3057\u305f\u3082\u306e\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u914d\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u304c\u6b63\u3057\u304fGmail\u306b\u53d7\u4fe1\u3055\u308c\u308b\u305f\u3081\u306b\u3082\u3001\u66f4\u65b0\u3055\u308c\u305f\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u306a\u304a\u3001\u4e0a\u8a18\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306f<strong>\u300c1\u65e5\u306b5,000\u4ef6\u3092\u8d85\u3048\u308b\u9001\u4fe1\u8005\u300d\u3068\u300c1\u65e5\u306b5,000\u4ef6\u4ee5\u4e0b\u306e\u9001\u4fe1\u8005\u300d<\/strong>\u3067\u8981\u4ef6\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u5206\u3051\u3066\u89e3\u8aac\u3092\u3057\u307e\u3059\u3002<\/p>\n<h3>\u9001\u4fe1\u6642\u306b\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u304c\u5fc5\u8981<\/h3>\n<p><strong>\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853<\/strong>\u306f\u3001\u9001\u4fe1\u5143\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u8a50\u79f0\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3001\u306a\u308a\u3059\u307e\u3057\u306e\u5224\u5b9a\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u306b\u306f<strong>\u300cSPF\u300d\u300cDKIM\u300d\u300cDMARC\u300d<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>1\u65e5\u306b5,000\u4ef6\u3092\u8d85\u3048\u308b\u914d\u4fe1\u8005\u306b\u306f\u300cSPF\u300d\u3068\u300cDKIM\u300d\u3001\u300cDMARC\u300d<strong>\u5168\u3066\u306e\u8a8d\u8a3c\u6280\u8853\u3092\u63a1\u7528\u3057\u305f\u4e0a\u3067\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u304c\u6c42\u3081\u3089\u308c\u3066\u304a\u308a<\/strong>\u3001\u305d\u308c\u672a\u6e80\u306e\u9001\u4fe1\u8005\u306b\u306f\u3069\u3061\u3089\u304b\u4e00\u65b9\u306e\u8a8d\u8a3c\u6280\u8853\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>Gmail\u3084Yahoo!\u30e1\u30fc\u30eb\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u30b7\u30a7\u30a2\u7387\u306e\u9ad8\u3044\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u306f\u3001SPF\u3084DKIM\u306f\u6a19\u6e96\u7684\u306b\u642d\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u81ea\u4f5c\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u305d\u3046\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u81ea\u5206\uff08\u81ea\u793e\uff09\u3067\u69cb\u7bc9\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u9001\u4fe1\u6642\u306b\u6697\u53f7\u5316\u6280\u8853\uff08TLS\u63a5\u7d9a\uff09\u304c\u5fc5\u8981<\/h3>\n<p><strong>TLS\uff08Transport Layer Security\uff09\u63a5\u7d9a<\/strong>\u3068\u306f\u3001\u30a6\u30a7\u30d6\u4e0a\u306e\u901a\u4fe1\u7d4c\u8def\u3092\u6697\u53f7\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u308b\u4ed5\u7d44\u307f\u3067\u3001\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1\u306b\u304a\u3044\u3066\u306f\u6539\u3056\u3093\u3084\u6f0f\u6d29\u306e\u9632\u6b62\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>TLS\u63a5\u7d9a\u3082DKIM\u3084SPF\u3068\u540c\u69d8\u306b\u3001\u5927\u624b\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u6280\u8853\u3067\u3059\u3002<\/p>\n<p>\u300c\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u3067\u306f\u3001\u5168\u3066\u306e\u9001\u4fe1\u8005\u306bTLS\u63a5\u7d9a\u3092\u6c42\u3081\u308b\u3001\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>TLS\u63a5\u7d9a\u3092\u4f7f\u3063\u3066\u3044\u306a\u3044\u9001\u4fe1\u8005\u306f\u3001\u5927\u91cf\u9001\u4fe1\u306e\u9001\u4fe1\u5143\u3067\u306a\u304f\u3068\u3082\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5206\u985e\u3055\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u9001\u53d7\u4fe1\u6642\u306b\u304a\u3051\u308bTLS\u63a5\u7d9a\u306e\u5f79\u5272\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u4f75\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u95a2\u9023\u8a18\u4e8b\uff1a<a href=\"https:\/\/blastmail.jp\/blog\/mail-delivery\/tls-send\">\u30e1\u30fc\u30eb\u914d\u4fe1\u306b\u304a\u3051\u308bTLS\u306e\u5f79\u5272\u3002Gmail\u306b\u6b63\u78ba\u306b\u30e1\u30fc\u30eb\u3092\u914d\u4fe1\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059<\/a><\/p>\n<h2>\u300c\u30e4\u30d5\u30fc\u30b8\u30e3\u30d1\u30f3\u300d\u3067\u306f\u73fe\u5728\u3001\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u95a2\u3057\u3066\u306e\u8a00\u53ca\u306f\u306a\u3044<\/h2>\n<p><strong>2024\u5e74\u73fe\u5728\u300cYahoo! JAPAN\u300d\u306f\u3001Gmail\u304c\u767a\u8868\u3057\u305f\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u6e96\u62e0\u3057\u305f\u65b0\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306f\u767a\u8868\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/strong><\/p>\n<p>\u3057\u304b\u3057\u3001\u5148\u8ff0\u306e\u901a\u308a\u4eca\u5f8c\u306f\u591a\u304f\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cGmail\u306e\u300c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u3068\u540c\u7a0b\u5ea6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\u3092\u6c42\u3081\u308b\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u767a\u8868\u3059\u308b\u3082\u306e\u3068\u601d\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>Gmail\u306e\u300c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u306b\u306f\u3001\u524d\u9805\u306e\u6982\u8981\u8aac\u660e\u3067\u306f\u89e6\u308c\u3066\u3044\u306a\u3044\u9805\u76ee\u3082\u3042\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u8981\u70b9\u3092\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u6280\u8853\u304c\u5fc5\u8981\uff085,000\u4ef6\/\u65e5 \u4ee5\u5185\u306e\u9001\u4fe1\u8005\u306fSPF\u304bDKIM\u306e\u3069\u3061\u3089\u304b\uff09<\/li>\n<li>TLS\u63a5\u7d9a\u304c\u5fc5\u8981<\/li>\n<li>Postmaster Tool\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u304c0.1%\u672a\u6e80<\/li>\n<li>From\u30d8\u30c3\u30c0\u306bGmail\u306e\u306a\u308a\u3059\u307e\u3057\u304c\u306a\u3044<\/li>\n<li>DMARC\u5bfe\u5fdc\u3001\u53ca\u3073\u30dd\u30ea\u30b7\u30fc\u5c0e\u5165\u304c\u5fc5\u8981\uff085,000\u4ef6\/\u65e5 \u4ee5\u4e0a\u306e\u9001\u4fe1\u8005\uff09<\/li>\n<li>\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u3067\u30e1\u30fc\u30eb\u914d\u4fe1\u3092\u505c\u6b62\u3067\u304d\u308b\u30aa\u30d7\u30c8\u30a2\u30a6\u30c8\u306e\u8a2d\u7f6e\uff085,000\u4ef6\/\u65e5 \u4ee5\u4e0a\u306e\u9001\u4fe1\u8005\uff09<\/div><\/li>\n<\/ul>\n<p>Gmail\u306e\u5229\u7528\u8005\u306b\u5411\u3051\u3066\u6b63\u78ba\u306b\u30e1\u30fc\u30eb\u3092\u914d\u4fe1\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306a\u8981\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>Yahoo! JAPAN\u3067\u3082\u3001\u540c\u69d8\u306e\u66f4\u65b0\u304c\u8003\u3048\u3089\u308c\u308b\u305f\u3081\u65e9\u3081\u306e\u5bfe\u7b56\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306b\u30e4\u30d5\u30fc\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u66f4\u65b0\u306f\u3069\u3046\u5f71\u97ff\u3059\u308b\uff1f<\/h2>\n<p>Yahoo!\u30e1\u30fc\u30eb\u306e\u3088\u3046\u306a\u30e6\u30fc\u30b6\u30fc\u304c\u591a\u3044\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u66f4\u65b0\u306f\u3001<strong>\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306b\u306f\u3069\u306e\u3088\u3046\u306b\u5f71\u97ff\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b<\/strong>\u3002<\/p>\n<p>\u307e\u305f\u3001\u305d\u306e\u969b\u306b\u767a\u751f\u3059\u308b\u554f\u984c\u3084\u30ea\u30b9\u30af\u3092\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u3053\u3053\u304b\u3089\u306f\u3001Gmail\u304c\u767a\u8868\u3057\u305f\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092Yahoo!\u30e1\u30fc\u30eb\u3067\u3082\u63a1\u7528\u3057\u305f\u5834\u5408\u306b\u767a\u751f\u3059\u308b\u554f\u984c\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u9001\u4fe1\u8005\u5074\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3067\u306f<strong>TLS\u63a5\u7d9a\u3068SPF\u30fbDKIM\u306e\u3069\u3061\u3089\u304b\u3092\u63a1\u7528\u3057\u306a\u3051\u308c\u3070\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5206\u985e\u3055\u308c\u308b<\/strong>\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><strong>1\u65e5\u306b5,000\u901a\u3092\u8d85\u3048\u308b\u914d\u4fe1\u3092\u3059\u308b\u5834\u5408\u306f\u3001\u30aa\u30d7\u30c8\u30a2\u30a6\u30c8\u306e\u8a2d\u7f6e\u306b\u52a0\u3048\u3066TLS\u63a5\u7d9a\u3068SPF\u30fbDKIM\u30fbDMARC\u306e\u5168\u3066\u3092\u63a1\u7528<\/strong>\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3055\u3089\u306b\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u304c0.1\uff05\u672a\u6e80\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001<strong>IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u6700\u9069\u5316\u3082\u5fc5\u8981<\/strong>\u3067\u3059\u3002<\/p>\n<div class=\"box01\"><span class=\"box-title\">IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u306f\uff1f<\/span>IP\u30a2\u30c9\u30ec\u30b9\uff08\u30a6\u30a7\u30d6\u4e0a\u306e\u4f4f\u6240\uff09\u306b\u95a2\u3059\u308b\u8a55\u4fa1\u3002\u30e1\u30fc\u30eb\u914d\u4fe1\u306b\u304a\u3044\u3066\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u3084\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306e\u5224\u65ad\u306b\u7528\u3044\u3089\u308c\u308b\u3002<\/div>\n<p>\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306e\u3088\u3046\u306a\u5927\u91cf\u914d\u4fe1\u3092\u524d\u63d0\u3068\u3057\u305f\u96c6\u5ba2\u3067\u306f\u3001<strong>\u4e0d\u9054\u30e1\u30fc\u30eb\u304c\u767a\u751f\u3057\u3084\u3059\u3044<\/strong>\u305f\u3081IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u4f4e\u4e0b\u3059\u308b\u50be\u5411\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Gmail\u306e\u3088\u3046\u306a\u7121\u6599\u3067\u4f7f\u7528\u53ef\u80fd\u306a\u30a6\u30a7\u30d6\u30e1\u30fc\u30eb\uff08\u30e1\u30fc\u30e9\u30fc\uff09\u3067\u306f\u3001\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u7248\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u914d\u4fe1\u30ea\u30b9\u30c8\u306e\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306a\u3069\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u307e\u305f\u300c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u3067\u306f\u30015,000\u4ef6\u306e\u3046\u30611\u4ef6\uff080.1\uff05\uff09\u4ee5\u4e0a\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u9001\u4fe1\u7387\u304c\u3042\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u30e1\u30fc\u30eb\u3092\u6b63\u5e38\u306b\u53d7\u4fe1\u3057\u306a\u3044\u53ef\u80fd\u6027\u304c\u793a\u5506\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306e\u3053\u3068\u3092\u8e0f\u307e\u3048\u308b\u3068\u300c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u306b\u5bfe\u5fdc\u3057\u305f\u3001\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3092\u884c\u3046\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u74b0\u5883\u3092\u6574\u5099\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>TLS\u63a5\u7d9a\u3092\u4f7f\u3046<\/li>\n<li>SPF\u30fbDKIM\u30fbDMARC\u306e\u8a2d\u5b9a<\/li>\n<li>\u5b9a\u671f\u7684\u306b\u4e0d\u9054\u30a2\u30c9\u30ec\u30b9\u306e\u524a\u9664\u3092\u884c\u3046<\/li>\n<li>\u30aa\u30d7\u30c8\u30a2\u30a6\u30c8\u3092\u8a2d\u7f6e\u3059\u308b\u3000<\/div><\/li>\n<\/ul>\n<p>\u53d7\u4fe1\u8005\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u5831\u544a\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306b\u306f\u4e0a\u8a18\u306e\u9805\u76ee\u306b\u52a0\u3048\u3066\u3001<strong>\u30b3\u30f3\u30c6\u30f3\u30c4\u81ea\u4f53\u306e\u8cea\u3082\u6539\u5584<\/strong>\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u73fe\u5728\u3001\u30e1\u30eb\u30de\u30ac\u3092\u306f\u3058\u3081\u3068\u3059\u308b<strong>\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3067\u306f\u3001HTML\u30e1\u30fc\u30eb\u3068\u547c\u3070\u308c\u308b\u8996\u899a\u7684\u306a\u8a34\u6c42\u52b9\u679c\u304c\u9ad8\u3044\u30e1\u30fc\u30eb\u5f62\u5f0f\u304c\u4e3b\u6d41<\/strong>\u3067\u3059\u3002<\/p>\n<p>\u30ac\u30e9\u30b1\u30fc\u6642\u4ee3\u306e\u3088\u3046\u306a\u3001\u30c6\u30ad\u30b9\u30c8\u306e\u307f\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u8aad\u307f\u8fbc\u3080\u6587\u5316\u306f\u307b\u3068\u3093\u3069\u6b8b\u3063\u3066\u3044\u306a\u3044\u3068\u8003\u3048\u3066\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u89e3\u8aac\u3057\u305f\u3088\u3046\u306a\u74b0\u5883\u306e\u6574\u5099\u3060\u3051\u3067\u306a\u304f\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u8cea\u306b\u3082\u76ee\u3092\u5411\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u300c\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300d\u3092\u4f7f\u3046\u3053\u3068\u3067\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u5bfe\u5fdc\u3057\u305f\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u304c\u3067\u304d\u308b<\/h2>\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306a\u9805\u76ee\u3092\u4f4e\u30b3\u30b9\u30c8\u3067\u30af\u30ea\u30a2\u3067\u304d\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u306f<strong>\u300c\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300d<\/strong>\u3068\u547c\u3070\u308c\u308b\u3001\u5927\u91cf\u914d\u4fe1\u306b\u7279\u5316\u3057\u305f\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30c4\u30fc\u30eb\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u300c\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300d\u306e\u7a2e\u985e\u3084\u6a5f\u80fd\u306f\u5e45\u5e83\u304f\u3001\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u306f\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u5341\u5206\u306b\u5bfe\u5fdc\u3067\u304d\u306a\u3044\u3082\u306e\u3082\u3042\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u3084\u6599\u91d1\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u6bd4\u8f03\u30fb\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u4f75\u305b\u3066\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u95a2\u9023\u8a18\u4e8b\uff1a<a href=\"https:\/\/blastmail.jp\/blog\/mail-delivery\/select20\">\u304a\u3059\u3059\u3081\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u6bd4\u8f0320\u9078\uff01\u56f3\u89e3\u3068\u30e9\u30f3\u30ad\u30f3\u30b0\u5f62\u5f0f\u3067\u89e3\u8aac<\/a><\/p>\n<p>\u4e0a\u8a18\u306e\u8a18\u4e8b\u3067\u3082\u7d39\u4ecb\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e1\u3064\u3067\u3042\u308b\u300c\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u300d\u3067\u306f\u3001Gmail\u306b\u3088\u308b\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u5bfe\u5fdc\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u300c\u30d6\u30e9\u30b9\u30c8\u30e1\u30fc\u30eb\u300d\u306f\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u5c0e\u5165\u304c\u521d\u3081\u3066\u306e\u65b9\u306b\u3082\u76f4\u611f\u7684\u306b\u4f7f\u7528\u304c\u3067\u304d\u308b\u30b7\u30f3\u30d7\u30eb\u306a\u64cd\u4f5c\u6027\u304c\u7279\u5fb4\u3067\u3001HTML\u30e1\u30fc\u30eb\u306e\u4f5c\u6210\u3082\u7c21\u5358\u306b\u884c\u3046\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3092\u884c\u3063\u3066\u3044\u308b\u65b9\u306f\u662f\u975e\u3001\u8a73\u7d30\u3092\u304a\u78ba\u304b\u3081\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>Google\u304c\u767a\u8868\u3057\u305fGmail\u304c\u767a\u8868\u3057\u305f\u300c\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u306f\u3001\u9001\u4fe1\u8005\u306bTLS\u63a5\u7d9a\u3084SPF\u30fbDKIM\u8a8d\u8a3c\u3092\u6c42\u3081\u3066\u304a\u308a\u3001<strong>\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u9001\u4fe1\u8005\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u5206\u985e\u3055\u308c\u308b<\/strong>\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<strong><\/strong><\/p>\n<p>\u3057\u304b\u3057\u3001\u4e16\u754c\u7684\u306b\u3082\u30e6\u30fc\u30b6\u30fc\u6570\u306e\u591a\u3044Gmail\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u64b2\u6ec5\u3092\u63b2\u3052\u305f\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u767a\u8868\u3057\u305f\u3053\u3068\u3067\u3001\u4ed6\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u3082\u540c\u69d8\u306e\u52d5\u304d\u3068\u306a\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3059\u3067\u306b<strong>\u300c\u7c73Yahoo!\u300d\u3067\u306f\u3001\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u66f4\u65b0\u304c\u5b9f\u65bd\u3055\u308c\u3066\u3044\u308b<\/strong>\u305f\u3081Yahoo!\u30e1\u30fc\u30eb\u3092\u63d0\u4f9b\u3059\u308b\u300cYahoo! 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