{"id":12347,"date":"2020-03-06T11:48:16","date_gmt":"2020-03-06T02:48:16","guid":{"rendered":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=12347"},"modified":"2025-11-26T13:35:00","modified_gmt":"2025-11-26T04:35:00","slug":"sendgrid-%e6%96%b0%e4%ba%ba%e6%88%90%e9%95%b7%e8%a8%98%e3%80%80%e7%ac%ac%e4%b9%9d%e5%9b%9e%e3%80%80%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%82%92%e7%ab%8b%e3%81%a6%e3%81%a6%e3%83%a1","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=12347","title":{"rendered":"\u3010SendGrid\u57fa\u672c\u8b1b\u5ea7 #9\u3011\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3092\u7acb\u3066\u3066\u30e1\u30fc\u30eb\u9001\u4fe1\u3057\u3066\u307f\u308b"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/11\/9.png\" alt=\"\u3010SendGrid\u57fa\u672c\u8b1b\u5ea7 #9\u3011\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3092\u7acb\u3066\u3066\u30e1\u30fc\u30eb\u9001\u4fe1\u3057\u3066\u307f\u308b\" width=\"100%\" class=\"aligncenter size-full wp-image-19731\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/11\/9.png 650w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/11\/9-300x185.png 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/11\/9-225x139.png 225w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/p>\n<p>\u6700\u8fd1\u306fGmail\u306a\u3069\u306eWeb\u30e1\u30fc\u30eb\u304c\u4e00\u822c\u7684\u306b\u306a\u308a\u3001\u30a4\u30f3\u30d5\u30e9\u3092\u610f\u8b58\u305b\u305a\u3068\u3082\u30e1\u30fc\u30eb\u304c\u9001\u308c\u3066\u3057\u307e\u3046\u4e16\u306e\u4e2d\u3067\u3059\u3002\u304b\u304f\u3044\u3046\u79c1\u3082\u3054\u591a\u5206\u306b\u6d29\u308c\u305a\u3001\u30e1\u30fc\u30eb\u306e\u4ed5\u7d44\u307f\u306b\u7121\u9813\u7740\u306a\u307e\u307e\u4e8c\u5341\u4f59\u5e74\u304c\u904e\u304e\u3066\u3044\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001SendGrid\u30c1\u30fc\u30e0\u3067\u50cd\u304f\u3046\u3061\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u5fc5\u8981\u306a\u624b\u9806\u3092\u5b66\u3093\u3067\u304a\u304d\u305f\u3044\u3068\u601d\u3046\u3088\u3046\u306b\u306a\u308a\u3001\u4eca\u56de\u30c1\u30e3\u30ec\u30f3\u30b8\u3057\u3066\u307f\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u76f4\u63a5SendGrid\u306e\u6a5f\u80fd\u306b\u95a2\u308f\u308b\u8a71\u3067\u306f\u306a\u3044\u306e\u3067\uff08\u3044\u3044\u3093\u3067\u3057\u3087\u3046\u304b\uff09\u3001\u8a2d\u5b9a\u7b49\u306e\u8a73\u7d30\u306a\u8aac\u660e\u306f\u305b\u305a\u306b\u3001\u30e1\u30fc\u30eb\u304c\u9001\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067\u306e\u6d41\u308c\u3092\u3088\u304f\u77e5\u3089\u306a\u3044\u4eba\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u66f8\u3051\u305f\u3089\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u304c\u9001\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067 (1) : \u30a4\u30f3\u30d5\u30e9\u306e\u69cb\u7bc9<\/h3>\n<p>\u4f4f\u3080\u5bb6\u3084\u4f4f\u6240\u304c\u306a\u3051\u308c\u3070\u624b\u7d19\u306e\u53d7\u3051\u6e21\u3057\u304c\u3067\u304d\u306a\u3044\u306e\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u30e1\u30fc\u30eb\u306e\u5834\u5408\u306b\u3082\u307e\u305a\u6700\u4f4e\u9650\u306e\u57fa\u76e4\uff1d\u30a4\u30f3\u30d5\u30e9\u3092\u6e96\u5099\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<h4>\u30b5\u30fc\u30d0\u3092\u7528\u610f\u3059\u308b<\/h4>\n<p>\u307e\u305a\u306f\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u3092\u5b9f\u969b\u306b\u884c\u3046\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\uff08\u30b5\u30fc\u30d0\uff09\u304c\u306a\u3044\u3068\u59cb\u307e\u308a\u307e\u305b\u3093\u3002<br \/>\n\u4eca\u56de\u306f\u3001Amazon Web Services (AWS) \u304c\u63d0\u4f9b\u3059\u308b\u30af\u30e9\u30a6\u30c9\u4e0a\u306e\u4eee\u60f3\u30b5\u30fc\u30d0 Amazon Elastic Compute Cloud (Amazon EC2; \u4ee5\u5f8cEC2)\u3092\u5229\u7528\u3057\u307e\u3057\u305f\u3002\u7269\u7406\u7684\u306a\u30b5\u30fc\u30d0\u3092\u7528\u610f\u3057\u306a\u304f\u3066\u3082\u3001Web\u30da\u30fc\u30b8\u304b\u3089\u7c21\u5358\u306a\u64cd\u4f5c\u3067\u81ea\u5206\u5c02\u7528\u306e\u30b5\u30fc\u30d0\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u3066\u4fbf\u5229\u3067\u3059\u3002AWS\u306f\u30e6\u30fc\u30b6\u767b\u9332\u5f8c1\u5e74\u9593\u306f\u7121\u6599\u5229\u7528\u67a0\u304c\u3042\u308a\u3001\u4eca\u56de\u3082\u305d\u306e\u7bc4\u56f2\u5185\u3067EC2\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u30b5\u30fc\u30d0\u3092\u7528\u610f\u3057\u305f\u3089\u3001\u30e1\u30fc\u30eb\u3092\u53d6\u308a\u6271\u3048\u308b\u3088\u3046\u306b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u7528\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\uff08\u3053\u308c\u306fMail Transfer Agent\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\uff09\u3002\u4ee3\u8868\u7684\u306a\u3082\u306e\u3068\u3057\u3066Postfix\u304c\u77e5\u3089\u308c\u3066\u3044\u3066\u3001\u4eca\u56de\u306f\u3053\u308c\u3092\u4f7f\u3044\u307e\u3057\u305f\u3002\u3042\u308a\u304c\u305f\u3044\u3053\u3068\u306b\u3001EC2\u306b\u306f\u6700\u521d\u304b\u3089\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u5b9f\u306f\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u81ea\u4f53\u306f\u3082\u3046\u3059\u3067\u306b\u53ef\u80fd\u3067\u3059\u3002EC2\u306e\u30b5\u30fc\u30d0\u306b\u63a5\u7d9a\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067\u9001\u4fe1\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ sendmail atesaki@toaddress.example\t\uff03\u5b9b\u5148\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\r\nFrom:sasidasi@fromaddress.example\t\t\uff03\u5dee\u51fa\u4eba (From\u30d8\u30c3\u30c0) \u3092\u6307\u5b9a\r\nTo:atesaki@toaddress.example\t\t\t\uff03\u5b9b\u5148 (To\u30d8\u30c3\u30c0) \u3092\u6307\u5b9a\r\nSubject:test\t\t\t\t\t\t\u3000\u3000\uff03\u4ef6\u540d (Subject\u30d8\u30c3\u30c0) \u3092\u6307\u5b9a\r\nThis is test.\t\t\t\t\t\t\u3000\u3000\uff03\u672c\u6587\u3092\u5165\u529b\r\n.\t\t\t\t\t\t\t\t\u3000\u3000\u3000\u3000\uff03\u30d4\u30ea\u30aa\u30c9\u3067\u7d42\u4e86\r\n<\/pre>\n<p>\u3053\u3053\u3067\u3001\u5b9b\u5148\u306f\u30e1\u30fc\u30eb\u304c\u78ba\u8a8d\u3067\u304d\u308b\u30a2\u30c9\u30ec\u30b9\u3001\u5dee\u51fa\u4eba\u306f\u9069\u5f53\u306a\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\uff08\u4e0a\u3067\u306f\u3001\u4f8b\u3068\u3057\u3066\u5b9b\u5148\u30c9\u30e1\u30a4\u30f3\u306btoaddress.example\u3001\u5dee\u51fa\u4eba\u306e\u30c9\u30e1\u30a4\u30f3\u306bfromaddress.example\u3092\u4f7f\u3044\u307e\u3057\u305f\uff09\u3002<br \/>\n\u3057\u304b\u3057\u3001\u5b9f\u969b\u306b\u81ea\u5206\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306b\u9001\u3063\u3066\u307f\u308b\u3068\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u3059\u3089\u5c4a\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u3053\u306e\u30e1\u30fc\u30eb\u306f\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u3068\u306f\u3068\u3066\u3082\u8a00\u3048\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<h4>\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u7528\u610f\u3059\u308b<\/h4>\n<p>\u4e0a\u306e\u30e1\u30fc\u30eb\u304c\u6b63\u5f53\u3067\u306a\u3044\u30dd\u30a4\u30f3\u30c8\u306e\u4e00\u3064\u306f\u3001\u5dee\u51fa\u4eba\u30a2\u30c9\u30ec\u30b9\u304c\u9069\u5f53\u3067\u3001\u8eab\u5143\u3092\u304d\u3061\u3093\u3068\u660e\u3089\u304b\u306b\u3057\u3066\u3044\u306a\u3044\u3068\u3053\u308d\u3067\u3059\u3002\u305d\u3053\u3067\u307e\u305a\u306f\u3001\u30e1\u30fc\u30eb\u306e\u5dee\u51fa\u4eba\u3001\u3064\u307e\u308a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u6c7a\u3081\u307e\u3059\u3002Gmail\u306e\u5834\u5408\u306b\u306f\u201dgmail.com\u201d\u3001Yahoo! JAPAN\u306e\u30e1\u30fc\u30eb\u306e\u5834\u5408\u306f\u201dyahoo.co.jp\u201d\u3068\u3044\u3046\u3088\u3046\u306b\u4e88\u3081\u30c9\u30e1\u30a4\u30f3\u304c\u6c7a\u307e\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u672c\u6765\u306f\u305d\u308c\u3082\u81ea\u5206\u3067\u7528\u610f\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u300c\u304a\u540d\u524d.com\u300d\u3084Amazon Route53\u306a\u3069\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u3092\u8cfc\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u4ee5\u5f8c\u201dfromaddress.example\u201d\u30c9\u30e1\u30a4\u30f3\u3092\u53d6\u5f97\u3057\u305f\u3068\u3057\u3066\u8a71\u3092\u9032\u3081\u307e\u3059\u3002<br \/>\n\u5b9f\u969b\u306b\u81ea\u5206\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u7528\u610f\u3057\u3066\u5dee\u51fa\u4eba\u3068\u3057\u3066\u6307\u5b9a\u3057\u3001Gmail\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u5b9b\u3066\u306b\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u3092\u8a66\u3057\u3066\u307f\u307e\u3057\u305f\u304c\u3001\u305d\u308c\u3067\u3082\u5c4a\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u30c9\u30e1\u30a4\u30f3\u3092\u7528\u610f\u3057\u305f\u3060\u3051\u3067\u306f\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u3060\u3068\u3044\u3046\u8a3c\u660e\u306b\u306f\u306a\u3089\u306a\u304b\u3063\u305f\u3088\u3046\u3067\u3059\u3002\u53d7\u4fe1\u8005\u5074\u306b\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u3067\u306a\u3044\u3068\u8a8d\u3081\u3066\u3082\u3089\u3046\u305f\u3081\u306b\u3001\u3084\u3089\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u306f\u307e\u3060\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u304c\u9001\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067 (2) : \u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u5bfe\u7b56<\/h3>\n<h4>\u56fa\u5b9aIP\u30a2\u30c9\u30ec\u30b9\u3092\u7528\u610f\u3059\u308b<\/h4>\n<p>\u8eab\u5143\u60c5\u5831\u306f\u5dee\u51fa\u4eba\u306e\u4ed6\u306b\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306f\u3001\u30b5\u30fc\u30d0\u306e\u4f4f\u6240\uff08\uff1dIP\u30a2\u30c9\u30ec\u30b9\uff09\u3067\u3059\u3002EC2\u3067\u306fIP\u30a2\u30c9\u30ec\u30b9\u304c\u306f\u3058\u3081\u304b\u3089\u7d10\u4ed8\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u5909\u52d5\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u5f8c\u306e\u8a2d\u5b9a\u3092\u3057\u3084\u3059\u304f\u3059\u308b\u3088\u3046\u3001\u56fa\u5b9aIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u307e\u3057\u305f\u3002AWS\u306e\u5834\u5408\u3001\u56fa\u5b9aIP\u30a2\u30c9\u30ec\u30b9\u306fElastic IP\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u56fa\u5b9aIP\u30a2\u30c9\u30ec\u30b9\u3092\u7528\u610f\u3057\u305f\u3089\u3001\u5dee\u51fa\u4eba\u30c9\u30e1\u30a4\u30f3\u306eA\u30ec\u30b3\u30fc\u30c9\u306b\u8a18\u8f09\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<h4>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b 1. SPF<\/h4>\n<p>\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306e\u5224\u5225\u306e\u305f\u3081\u306b\u78ba\u7acb\u3055\u308c\u305f\u6280\u8853\u304c\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3067\u3059\u3002\u305d\u306e\u4e2d\u3067\u3082<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3509\" rel=\"noopener\" target=\"_blank\">SPF (Sender Policy Framework) <\/a>\u306f\u3001\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u7167\u5408\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u9001\u4fe1\u8005\u306f\u30c9\u30e1\u30a4\u30f3\u306eDNS\u30ec\u30b3\u30fc\u30c9\u306b\u3069\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u308b\u304b\u660e\u8a18\u3057\u307e\u3059\u3002\u53d7\u4fe1\u8005\u306f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u306eDNS\u30ec\u30b3\u30fc\u30c9\u306b\u8a18\u8f09\u3055\u308c\u305fIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u6b63\u3057\u304f\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u305f\u304b\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002<br \/>\n\u81ea\u5206\u3067\u8a2d\u5b9a\u3059\u308b\u3068\u304d\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u4e8c\u3064\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>\u30c9\u30e1\u30a4\u30f3\u306eTXT\u30ec\u30b3\u30fc\u30c9\u306b\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u8a18\u8f09\uff08\u4ee5\u4e0b\u306f\u4f8b\uff09<\/li>\n<\/ul>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ dig fromaddress.example txt\r\nfromaddress.example IN TXT &quot;v=spf1 ip4:198.51.100.255 -all&quot;\r\n<\/pre>\n<ul>\n<li>\u30e1\u30fc\u30eb\u306eReturn-Path\u306b\u81ea\u5206\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u8a2d\u5b9a<\/li>\n<\/ul>\n<p>\u3053\u308c\u3067\u3001\u5dee\u51fa\u4eba\u30c9\u30e1\u30a4\u30f3\u3068IP\u30a2\u30c9\u30ec\u30b9\u304c\u5bfe\u5fdc\u4ed8\u304d\u3001\u30b9\u30d1\u30e0\u3068\u898b\u306a\u3055\u308c\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002\u81ea\u5206\u3067\u8a66\u3057\u3066\u307f\u305f\u3068\u304d\u306b\u306f\u3001SPF\u3092\u8a2d\u5b9a\u3057\u305f\u3068\u3053\u308dGmail\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u30e1\u30fc\u30eb\u304c\u5c4a\u304f\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\uff01<br \/>\n\u305f\u3060\u3053\u308c\u3067\u5145\u5206\u3068\u306f\u307e\u3060\u8a00\u3048\u306a\u3044\u306e\u3067\u3001\u4ed6\u306b\u3082\u3084\u3063\u3066\u307f\u305f\u8a2d\u5b9a\u3092\u4ee5\u4e0b\u3067\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h4>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b 2. DKIM<\/h4>\n<p><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=2044\" rel=\"noopener\" target=\"_blank\">DKIM (DomainKeys Identified Mail) <\/a>\u306f\u3001\u96fb\u5b50\u7f72\u540d\u3092\u7528\u3044\u305f\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3067\u3059\u3002\u9001\u4fe1\u8005\u306f\u96fb\u5b50\u7f72\u540d\u3092\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u8a18\u8f09\u3057\u3001\u53d7\u4fe1\u8005\u306f\u9001\u4fe1\u8005\u306e\u30c9\u30e1\u30a4\u30f3\u306eDNS\u30ec\u30b3\u30fc\u30c9\u306b\u8a18\u8f09\u3055\u308c\u305f\u516c\u958b\u9375\u3092\u4f7f\u3063\u3066\u305d\u308c\u3092\u7167\u5408\u3057\u307e\u3059\u3002\u5fc5\u8981\u306a\u4f5c\u696d\u306f\u4ee5\u4e0b\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u516c\u958b\u9375\u3068\u79d8\u5bc6\u9375\u306e\u30da\u30a2\u3092\u751f\u6210<\/li>\n<li>DNS\u306b\u516c\u958b\u9375\u3092\u8a18\u8f09\u3057\u305fDKIM\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\uff08\u4ee5\u4e0b\u306f\u4f8b\uff09<\/li>\n<\/ul>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ dig s1._domainkey.fromaddress.example txt\r\ns1._domainkey.fromaddress.example IN TXT &quot;v=DKIM1; k=rsa; p=XXXXX&quot;\r\n<\/pre>\n<ul>\n<li>\u79d8\u5bc6\u9375\u3092\u7528\u3044\u3066\u4f5c\u6210\u3057\u305f\u96fb\u5b50\u7f72\u540d\u3092\u30e1\u30fc\u30eb\u306eDKIM-Signature\u30d8\u30c3\u30c0\u306b\u8a18\u8f09\u3059\u308b\u3088\u3046\u8a2d\u5b9a<\/li>\n<\/ul>\n<p>\u3053\u308c\u3067\u3001\u30e1\u30fc\u30eb\u304c\u6307\u5b9a\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u304d\u3061\u3093\u3068\u5c4a\u304d\u3001\u304b\u3064\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u8a3c\u660e\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b 3. DMARC<\/h4>\n<p>\u3053\u308c\u306f\u4e0a\u4e8c\u3064\u3068\u5c11\u3057\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u7570\u306a\u308a\u307e\u3059\u3002SPF\u3068DKIM\u306f\u81ea\u5206\u304c\u9001\u3063\u305f\u30e1\u30fc\u30eb\u304c\u306a\u308a\u3059\u307e\u3057\u3067\u306a\u3044\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u3082\u306e\u3067\u3042\u3063\u305f\u306e\u306b\u5bfe\u3057\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=3137\" rel=\"noopener\" target=\"_blank\">DMARC (Domain-based Message Authentication, Reporting, and Conformance) <\/a>\u306f\u81ea\u5206\u306b\u306a\u308a\u3059\u307e\u3057\u305f\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u8005\u304c\u3069\u3046\u51e6\u7406\u3059\u3079\u304d\u304b\u5ba3\u8a00\u3059\u308b\u3082\u306e\u3067\u3059\u3002<br \/>\n\u884c\u3063\u305f\u4f5c\u696d\u306f\u3001_dmarc.fromaddress.example\u3078\u306eTXT\u30ec\u30b3\u30fc\u30c9\u8ffd\u52a0\u3067\u3059\u3002<\/p>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ dig _dmarc.fromaddress.example txt\r\n_dmarc.fromaddress.example. IN TXT\u3000&quot;v=DMARC1;p=none;rua=mailto:dmarc@fromaddress.example;ruf=mailto:dmarc@fromaddress.example;rf=afrf;pct=100&quot;\r\n<\/pre>\n<div id=\"attachment_12349\" style=\"width: 660px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-12349\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig1.png\" alt=\"DMARC\" width=\"100%\" class=\"size-full wp-image-12349\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig1.png 1122w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig1-300x67.png 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig1-768x172.png 768w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig1-1024x230.png 1024w\" sizes=\"(max-width: 1122px) 100vw, 1122px\" \/><p id=\"caption-attachment-12349\" class=\"wp-caption-text\">3\u3064\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3057\u3066\u3001Gmail\u3067\u78ba\u8a8d\u3057\u305f\u3068\u3053\u308d<\/p><\/div>\n<h4>Reverse DNS\u3092\u8a2d\u5b9a\u3059\u308b<\/h4>\n<p>IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u3092\u8abf\u3079\u308b\u3053\u3068\u3092\u9006\u5f15\u304d (Reverse DNS lookup) \u3068\u547c\u3073\u307e\u3059\u3002\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u3092\u9006\u5f15\u304d\u3067\u304d\u306a\u3044\u5834\u5408\u3001\u53d7\u4fe1\u8005\u306b\u3088\u3063\u3066\u306f\u53d7\u3051\u53d6\u308a\u304c\u62d2\u5426\u3055\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3001\u8a2d\u5b9a\u3057\u305f\u307b\u3046\u304c\u3088\u3044\u3067\u3057\u3087\u3046\u3002EC2\u306e\u5834\u5408\u306b\u306f\u30d5\u30a9\u30fc\u30e0\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u3066\u3001IP\u30a2\u30c9\u30ec\u30b9\u3068\u30c9\u30e1\u30a4\u30f3\u3092\u77e5\u3089\u305b\u308b\u3068Reverse DNS\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u304c\u9001\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067 (3) : \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/h3>\n<p>\u81ea\u5206\u304c\u9001\u308b\u30e1\u30fc\u30eb\u3084\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3092\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u304b\u3089\u5b88\u308b\u8a2d\u5b9a\u3082\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h4>TLS\u3067\u6697\u53f7\u5316\u3059\u308b<\/h4>\n<p>Gmail\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u5b9b\u306b\u9001\u3063\u305f\u30e1\u30fc\u30eb\u3092\u898b\u3066\u307f\u308b\u3068\u3001\u659c\u7dda\u4ed8\u304d\u306e\u8d64\u3044\u9320\u524d\u30de\u30fc\u30af\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30e1\u30fc\u30eb\u304cTLS (Transport Layer Security) \u3068\u3044\u3046\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u793a\u3059\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u307e\u307e\u3060\u3068\u30e1\u30fc\u30eb\u304c\u76d7\u307f\u898b\u3089\u308c\u308b\u30ea\u30b9\u30af\u304c\u3042\u308b\u306e\u3067\u3001\u304d\u3061\u3093\u3068\u6697\u53f7\u5316\u3057\u305f\u307b\u3046\u304c\u3044\u3044\u3067\u3057\u3087\u3046\u3002Postfix\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u5c11\u3057\u7de8\u96c6\u3059\u308b\u3053\u3068\u3067\u8a2d\u5b9a\u304c\u53ef\u80fd\u3067\u3059\u3002\u8a2d\u5b9a\u304c\u5b8c\u4e86\u3059\u308b\u3068\u3001\u9320\u524d\u30de\u30fc\u30af\u304c\u8d64\u304b\u3089\u7070\u8272\u306b\u5909\u308f\u308a\u3001TLS\u6697\u53f7\u5316\u304c\u3067\u304d\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<div id=\"attachment_12350\" style=\"width: 660px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-12350\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig2.png\" alt=\"TLS\u3067\u6697\u53f7\u5316\u3059\u308b\" width=\"100%\" class=\"size-full wp-image-12350\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig2.png 816w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig2-300x10.png 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2020\/03\/fig2-768x25.png 768w\" sizes=\"(max-width: 816px) 100vw, 816px\" \/><p id=\"caption-attachment-12350\" class=\"wp-caption-text\">TLS\u6697\u53f7\u5316\u8a2d\u5b9a\u30d3\u30d5\u30a9\u30fc\u30a2\u30d5\u30bf\u30fc\uff08\u30e2\u30b6\u30a4\u30af\u90e8\u5206\u306f\u30c9\u30e1\u30a4\u30f3\uff09<\/p><\/div>\n<h4>SMTP\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b<\/h4>\n<p>\u3053\u308c\u306f\u3001\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u6642\u306b\u30a2\u30ab\u30a6\u30f3\u30c8\u540d\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u306a\u3069\u306e\u8a8d\u8a3c\u3092\u8a2d\u3051\u3066\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u306e\u4e0d\u6b63\u5229\u7528\u3092\u9632\u3050\u3082\u306e\u3067\u3059\u3002Postfix\u3067\u306f\u6c4e\u7528\u7684\u306a\u8a8d\u8a3c\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3042\u308bSASL (Simple Authentication and Security Layler) \u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3059\u308b\u306e\u3067\u3001\u3053\u308c\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u3001Postfix\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u7de8\u96c6\u3059\u308b\u3053\u3068\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<h4>EC2\u9001\u4fe1\u5236\u9650\u306e\u89e3\u9664\u3092\u7533\u8acb\u3059\u308b<\/h4>\n<p>\u81ea\u5206\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u304b\u3089\u9001\u4fe1\u304c\u53ef\u80fd\u3068\u306a\u308a\u3001\u4f55\u901a\u304b\u30c6\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u3044\u305f\u3089\u3001\u201dConnection timed out\u201d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u983b\u51fa\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u6700\u7d42\u7684\u306b\u5168\u304f\u9001\u308c\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001EC2\u3092\u7528\u3044\u305f\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u3092\u9632\u3050\u305f\u3081\u306bAWS\u304c\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u9001\u4fe1\u5236\u9650\u306b\u62b5\u89e6\u3057\u305f\u3082\u306e\u3068\u601d\u308f\u308c\u307e\u3059\u3002AWS\u306eEC2\u3067\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3092\u7acb\u3066\u305f\u3044\u5834\u5408\u3001\u3053\u306e\u9001\u4fe1\u5236\u9650\u3092\u89e3\u9664\u3057\u3066\u3082\u3089\u308f\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u7533\u8acb\u306fReverse DNS\u3068\u540c\u3058\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u53ef\u80fd\u3067\u3059\u3002\u7533\u8acb\u3092\u884c\u3063\u305f\u3068\u3053\u308d\u3001\u6570\u55b6\u696d\u65e5\u5f8c\u306b\u5236\u9650\u89e3\u9664\u3055\u308c\u305f\u65e8\u306e\u8fd4\u4fe1\u304c\u6765\u3066\u3001\u7121\u4e8b\u306b\u307e\u305f\u30e1\u30fc\u30eb\u3092\u9001\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<h4>\u4e0d\u6b63\u4e2d\u7d99\u306b\u5229\u7528\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b<\/h4>\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u3057\u3063\u304b\u308a\u8a2d\u3051\u306a\u3044\u3068\u3001\u81ea\u5206\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3092\u8e0f\u307f\u53f0\u306b\u3057\u3066\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002EC2\u306b\u30e1\u30fc\u30eb\u9001\u4fe1\u5236\u9650\u304c\u3042\u308b\u306e\u3082\u3053\u306e\u305f\u3081\u3067\u3059\u3002\u9001\u4fe1\u5236\u9650\u3092\u89e3\u9664\u3057\u305f\u304b\u3089\u306b\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u306b\u4f7f\u308f\u308c\u306a\u3044\u3088\u3046\u306b\u81ea\u5206\u3067\u5bfe\u7b56\u3092\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002Postfix\u3067\u306f\u4e2d\u7d99\u3092\u8a31\u53ef\u3059\u308b\u30b5\u30fc\u30d0\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u4f8b\u3048\u3070\u81ea\u5206\u81ea\u8eab\uff08\u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8\uff09\u3060\u3051\u3092\u6307\u5b9a\u3059\u308c\u3070\u3001\u5916\u90e8\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306e\u4e2d\u7d99\u3092\u7981\u6b62\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u9001\u4fe1\u3092\u30a4\u30c1\u304b\u3089\u3084\u3063\u3066\u307f\u3066<\/h3>\n<p>\u3053\u3053\u307e\u3067\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u6700\u4f4e\u9650\u5fc5\u8981\u306a\u3053\u3068\u3092\u6982\u89b3\u3057\u3066\u307f\u307e\u3057\u305f\u3002\u5b9f\u969b\u3084\u3063\u3066\u307f\u308b\u3068\u3001AWS\u306a\u3069\u306e\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d3\u30b9\u3092\u4f7f\u3048\u3070\u7c21\u5358\u306b\u30b5\u30fc\u30d0\u3092\u7acb\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30e1\u30fc\u30eb\u3092\u300c\u305f\u3060\u9001\u308b\u300d\u306e\u306f\u96e3\u3057\u304f\u306a\u3044\u3068\u308f\u304b\u308a\u307e\u3057\u305f\u3002\u305d\u308c\u3088\u308a\u3082\u305a\u3063\u3068\u5927\u5909\u306a\u306e\u306f\u3001\u30e1\u30fc\u30eb\u3092\u300c\u304d\u3061\u3093\u3068\u5c4a\u3051\u308b\u300d\u3053\u3068\u3067\u3059\u3002\u81ea\u5206\u3067\u8a66\u3057\u3066\u307f\u3066\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u62c5\u4fdd\u3059\u308b\u3053\u3068\u3084\u3001\u30b9\u30d1\u30e0\u3068\u52d8\u9055\u3044\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u30e1\u30fc\u30eb\u3092\u9001\u308b\u3053\u3068\u306e\u5927\u5207\u3055\u3092\u5b9f\u611f\u3067\u304d\u307e\u3057\u305f\u3002SendGrid\u3092\u4f7f\u3048\u3070\u3001\u5927\u91cf\u9001\u4fe1\u306e\u7ba1\u7406\u307e\u3067\u542b\u3081\u305f\u3001\u30e1\u30fc\u30eb\u3092\u6b63\u3057\u304f\u5c4a\u3051\u308b\u305f\u3081\u306e\u30ce\u30a6\u30cf\u30a6\u3092\u8ab0\u3067\u3082\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002\u305d\u3093\u306a\u624b\u8efd\u3055\u3001\u4fbf\u5229\u3055\u3092\u6539\u3081\u3066\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u306fGmail\u306a\u3069\u306eWeb\u30e1\u30fc\u30eb\u304c\u4e00\u822c\u7684\u306b\u306a\u308a\u3001\u30a4\u30f3\u30d5\u30e9\u3092\u610f\u8b58\u305b\u305a\u3068\u3082\u30e1\u30fc\u30eb\u304c\u9001\u308c\u3066\u3057\u307e\u3046\u4e16\u306e\u4e2d\u3067\u3059\u3002\u304b\u304f\u3044\u3046\u79c1\u3082\u3054\u591a\u5206\u306b\u6d29\u308c\u305a\u3001\u30e1\u30fc\u30eb\u306e\u4ed5\u7d44\u307f\u306b\u7121\u9813\u7740\u306a\u307e\u307e\u4e8c\u5341\u4f59\u5e74\u304c\u904e\u304e\u3066\u3044\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001SendGrid\u30c1\u30fc\u30e0\u3067\u50cd <a class=\"read-more\" href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=12347\">&#8230;\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":15,"featured_media":19731,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-12347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12347"}],"version-history":[{"count":12,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12347\/revisions"}],"predecessor-version":[{"id":19742,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12347\/revisions\/19742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/media\/19731"}],"wp:attachment":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}