{"id":9949,"date":"2023-11-09T11:30:45","date_gmt":"2023-11-09T02:30:45","guid":{"rendered":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=9949"},"modified":"2024-05-20T11:21:21","modified_gmt":"2024-05-20T02:21:21","slug":"%e3%83%a1%e3%83%bc%e3%83%ab%e3%83%98%e3%83%83%e3%83%80%e5%85%a5%e9%96%80","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=9949","title":{"rendered":"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u5165\u9580"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/20231109_blog.png\" alt=\"\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u5165\u9580\" width=\"100%\" class=\"aligncenter size-full wp-image-17043\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/20231109_blog.png 650w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/20231109_blog-300x185.png 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/p>\n<h3>\u306f\u3058\u3081\u306b<\/h3>\n<p>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u306f\u3069\u3093\u306a\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3054\u5b58\u3058\u3067\u3059\u304b\uff1f<br \/>\n\u3053\u3053\u304b\u3089\u4f55\u304c\u308f\u304b\u308b\u304b\u3092\u77e5\u3063\u3066\u304a\u304f\u3068\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u3067\u30c8\u30e9\u30d6\u30eb\u304c\u8d77\u304d\u305f\u6642\u306b\u5f79\u7acb\u3064\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u4eca\u56de\u306f\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u898b\u65b9\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u78ba\u8a8d\u65b9\u6cd5<\/h3>\n<p>\u624b\u9806\u306f\u30e1\u30fc\u30e9\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002Gmail\u306a\u3069\u3001\u3044\u304f\u3064\u304b\u306e\u4e3b\u6d41\u306a\u30e1\u30fc\u30e9\u3067\u306e\u78ba\u8a8d\u65b9\u6cd5\u3092<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=14639\" rel=\"noopener\" target=\"_blank\">\u3053\u3061\u3089<\/a>\u306e\u30da\u30fc\u30b8\u3067\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u304b\u3089\u5f97\u3089\u308c\u308b\u60c5\u5831<\/h3>\n<p>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u304b\u3089\u5f97\u3089\u308c\u308b\u4e3b\u306a\u60c5\u5831\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u304c\u3001\u3053\u308c\u4ee5\u5916\u306b\u3082\u3055\u307e\u3056\u307e\u306a\u60c5\u5831\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li><a href=\"#001\">\u30c8\u30ec\u30fc\u30b9\u60c5\u5831<\/a><\/li>\n<li><a href=\"#002\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u95a2\u9023\u306e\u60c5\u5831<\/a><\/li>\n<li><a href=\"#003\">\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30e1\u30bf\u60c5\u5831<\/a><\/li>\n<\/ul>\n<h3>\u4e3b\u306a\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0<\/h3>\n<h4 id=\"001\">\u30c8\u30ec\u30fc\u30b9\u60c5\u5831<\/h4>\n<p>\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u306b\u306f\u30e1\u30fc\u30eb\u304c\u30ea\u30ec\u30fc\u3055\u308c\u305f\u7d4c\u8def\u3084\u4e0d\u9054\u901a\u77e5\u306e\u9001\u308a\u5148\u306a\u3069\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u4f8b\u3048\u3070\u9045\u5ef6\u306e\u767a\u751f\u7b87\u6240\u3084\u9045\u5ef6\u6642\u9593\u306a\u3069\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img3.png\" target=\"_blank\"><br \/>\n<img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img3.png\" alt=\"\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\" width=\"100%\" class=\"aligncenter size-full wp-image-17060\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img3.png 792w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img3-300x26.png 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img3-768x67.png 768w\" sizes=\"(max-width: 792px) 100vw, 792px\" \/><\/a><\/p>\n<ul>\n<li><strong>Return-Path<\/strong><br \/>\nReturn-Path\u30d8\u30c3\u30c0\u306f\u5225\u540d<strong>\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7From<\/strong>\u3068\u3082\u547c\u3070\u308c\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u914d\u9001\u3055\u308c\u308b\u904e\u7a0b\u3067\u4f55\u3089\u304b\u306e\u30c8\u30e9\u30d6\u30eb\u306b\u3088\u308a\u5c4a\u3051\u3089\u308c\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u30a8\u30e9\u30fc\u306e\u901a\u77e5\u5148\u3068\u3057\u3066\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30a8\u30e9\u30fc\u901a\u77e5\u306f\u3001\u300c\u4e0d\u9054\u901a\u77e5\u300d\u3084\u300c\u30d0\u30a6\u30f3\u30b9\u30e1\u30fc\u30eb\u300d\u3001\u300cNon-Delivery Receipt\uff08NDR\uff09\u300d\u3001\u300c\u914d\u4fe1\u4e0d\u80fd\u30ec\u30dd\u30fc\u30c8\u300d\u306a\u3069\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u7684\u306b\u3001\u30e1\u30fc\u30eb\u306f\u5b9b\u5148\u306b\u5c4a\u304f\u307e\u3067\u306e\u9593\u306b\u8907\u6570\u306e\u30b5\u30fc\u30d0\u3092\u7d4c\u7531\u3057\u307e\u3059\u304c\u3001Return-Path\u306b\u30a8\u30e9\u30fc\u3092\u901a\u77e5\u3059\u308b\u3053\u3068\u3067\u3001\u3069\u3053\u3067\u914d\u9001\u30c8\u30e9\u30d6\u30eb\u304c\u8d77\u304d\u3066\u3082\u9001\u4fe1\u8005\u5074\u3067\u691c\u77e5\u3067\u304d\u308b\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>Received<\/strong><br \/>\nReceived\u30d8\u30c3\u30c0\u306b\u306f\u30e1\u30fc\u30eb\u304c\u30ea\u30ec\u30fc\u3055\u308c\u305f\u30db\u30b9\u30c8\u306e\u60c5\u5831\u3068\u6642\u523b\u304c\u8a18\u9332\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u306f\u30d8\u30c3\u30c0\u306e\u6700\u4e0a\u90e8\u306bReceived\u30d8\u30c3\u30c0\u3092\u8ffd\u8a18\u3057\u3066\u6b21\u306e\u30b5\u30fc\u30d0\u306b\u30ea\u30ec\u30fc\u3057\u307e\u3059\u3002\u6700\u7d42\u7684\u306a\u5b9b\u5148\u306b\u914d\u4fe1\u3055\u308c\u308b\u307e\u3067\u3053\u306e\u6319\u52d5\u304c\u7e70\u308a\u8fd4\u3055\u308c\u308b\u305f\u3081\u3001Received\u30d8\u30c3\u30c0\u3092\u4e0b\u304b\u3089\u9806\u306b\u898b\u308c\u3070\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30ea\u30ec\u30fc\u7d4c\u8def\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u6642\u523b\u60c5\u5831\u306b\u7740\u76ee\u3059\u308b\u3068\u5404\u30db\u30b9\u30c8\u3067\u30ea\u30ec\u30fc\u306b\u8981\u3057\u305f\u6642\u9593\u304c\u78ba\u8a8d\u3067\u304d\u308b\u305f\u3081\u3001\u9045\u5ef6\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u8abf\u67fb\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>Received\u30d8\u30c3\u30c0\u306f\u5c11\u3057\u898b\u3065\u3089\u3044\u3067\u3059\u304c\u3001<a href=\"https:\/\/toolbox.googleapps.com\/apps\/messageheader\/\" rel=\"noopener\" target=\"_blank\">G Suite Toolbox\u306eMessageheader<\/a>\u3092\u4f7f\u3046\u3068\u30ea\u30ec\u30fc\u7d4c\u8def\u3068\u5404\u7d4c\u8def\u306e\u6240\u8981\u6642\u9593\u304c\u898b\u3084\u3059\u304f\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>Return-Path\u3084Received\u30d8\u30c3\u30c0\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc5321#section-4.4\" rel=\"noopener\" target=\"_blank\">RFC5321\uff08section 4.4\uff09<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h4 id=\"002\">\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u95a2\u9023\u306e\u60c5\u5831<\/h4>\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u30e1\u30fc\u30eb\u306e\u4fe1\u983c\u6027\u3068\u5230\u9054\u7387\u306e\u5411\u4e0a\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u304c\u6b63\u3057\u304f\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3053\u3053\u3067\u7d39\u4ecb\u3059\u308b\u30d8\u30c3\u30c0\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img1.png\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img1.png\" alt=\"\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u95a2\u9023\u306e\u60c5\u5831\" width=\"100%\" class=\"aligncenter size-full wp-image-17047\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img1.png 671w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img1-300x59.png 300w\" sizes=\"(max-width: 671px) 100vw, 671px\" \/><\/a><\/p>\n<ul>\n<li><strong>Authentication-Results<\/strong><br \/>Authentication-Results\u30d8\u30c3\u30c0\u306b\u306f<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=10121\" rel=\"noopener\" target=\"_blank\">SPF\u3084DKIM<\/a>\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=16911\" rel=\"noopener\" target=\"_blank\">DMARC<\/a>\u306a\u3069\u306e\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u7d50\u679c\u304c\u8a18\u9332\u3055\u308c\u307e\u3059\u3002\u7d50\u679c\u306f\u300c\u8a8d\u8a3c\u65b9\u5f0f = \u8a8d\u8a3c\u7d50\u679c\u300d\u306e\u3088\u3046\u306a\u5f62\u5f0f\u3067\u8a18\u9332\u3055\u308c\u3001\u4f8b\u3048\u3070\u6b21\u306e\u3088\u3046\u306a\u60c5\u5831\u304c\u8aad\u307f\u53d6\u308c\u307e\u3059\u3002\n<ul>\n<li>spf=softfail\uff1aSPF\u306e\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n<li>dkim=pass\uff1aDKIM\u306e\u8a8d\u8a3c\u6210\u529f<\/li>\n<li>dmarc=fail\uff1aDMARC\u306e\u8a8d\u8a3c\u5931\u6557<\/li>\n<\/ul>\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u7d50\u679c\u306f\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u898b\u7834\u308b\u306e\u306b\u3082\u5f79\u306b\u7acb\u3061\u307e\u3059\u3002<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=12290\" rel=\"noopener\" target=\"_blank\">\u3053\u3061\u3089<\/a>\u306e\u8a18\u4e8b\u3067\u3054\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<br \/>\nAuthentication-Result\u30d8\u30c3\u30c0\u306b\u3064\u3044\u3066\u3001\u8a73\u3057\u304f\u306f<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc7601\" rel=\"noopener\" target=\"_blank\">RFC7601<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>DKIM-Signature<\/strong><br \/>\nDKIM-Signature\u30d8\u30c3\u30c0\u306fDKIM\u306e\u8a8d\u8a3c\u306b\u5fc5\u8981\u306a\u7f72\u540d\u30c7\u30fc\u30bf\u3068\u516c\u958b\u9375\u306e\u30d1\u30b9\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306e\u60c5\u5831\u304c\u8a18\u9332\u3055\u308c\u307e\u3059\u3002DKIM-Signature\u30d8\u30c3\u30c0\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc6376#section-3.5\" rel=\"noopener\" target=\"_blank\">RFC6376\uff08section 3.5\uff09<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<h4 id=\"003\">\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30e1\u30bf\u60c5\u5831<\/h4>\n<p>\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u304b\u3089\u306f\u3001\u3053\u306e\u4ed6\u306b\u3082\u5b9b\u5148\u3001\u9001\u4fe1\u8005\u3001\u4ef6\u540d\u3001\u672c\u6587\u306e\u6587\u5b57\u30b3\u30fc\u30c9\u3084\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u306a\u3069\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30e1\u30bf\u60c5\u5831\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img2.png\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img2.png\" alt=\"\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30e1\u30bf\u60c5\u5831\" width=\"100%\" class=\"aligncenter size-full wp-image-17048\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img2.png 613w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/11\/231109_img2-300x44.png 300w\" sizes=\"(max-width: 613px) 100vw, 613px\" \/><\/a><\/p>\n<ul>\n<li><strong>Content-Type<\/strong><br \/>\n\u30de\u30eb\u30c1\u30d1\u30fc\u30c8\u30e1\u30fc\u30eb\u306e\u8a18\u4e8b\u3067\u3082\u89e6\u308c\u307e\u3057\u305f\u304c\u3001\u30e1\u30fc\u30eb\u672c\u6587\u306eMIME\u30bf\u30a4\u30d7\uff08\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3001\u30de\u30eb\u30c1\u30d1\u30fc\u30c8\u30e1\u30fc\u30eb\u306a\u3069\uff09\u3084\u6587\u5b57\u30b3\u30fc\u30c9\u3092\u8868\u3059\u30d8\u30c3\u30c0\u3067\u3059\u3002<\/li>\n<li><strong>Content-Transfer-Encoding<\/strong><br \/>\nbase64\u3084quoted-printable\u306a\u3069\u3001MIME\u3067\u4f7f\u7528\u3059\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u3092\u8868\u3059\u30d8\u30c3\u30c0\u3067\u3059\u3002<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=10958\" rel=\"noopener\" target=\"_blank\">\u3053\u3061\u3089<\/a>\u306e\u8a18\u4e8b\u3067\u65e5\u672c\u8a9e\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u969b\u306eContent-Transfer-Encoding\u30d8\u30c3\u30c0\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u4f75\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>Date<\/strong><br \/>\n\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u4f5c\u6210\u3055\u308c\u305f\u65e5\u6642\u3092\u8868\u3059\u30d8\u30c3\u30c0\u3067\u3059\u3002<\/li>\n<li><strong>To\u3001Cc\u3001Bcc\u3001From<\/strong><br \/>\n\u5b9b\u5148\u304a\u3088\u3073\u9001\u4fe1\u8005\u60c5\u5831\u304c\u8a18\u9332\u3055\u308c\u305f\u30d8\u30c3\u30c0\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u3046\u3061Bcc\u30d8\u30c3\u30c0\u306f\u6271\u3044\u304c\u7279\u6b8a\u3067\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u6307\u5b9a\u3055\u308c\u305fBcc\u30d8\u30c3\u30c0\u306f\u30b5\u30fc\u30d0\u3067\u524a\u9664\u3055\u308c\u3001\u540c\u3058\u5185\u5bb9\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304cBcc\u30d8\u30c3\u30c0\u3067\u6307\u5b9a\u3057\u305f\u5b9b\u5148\u306b\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>Message-ID<\/strong><br \/>\n\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4e00\u610f\u306b\u7279\u5b9a\u3059\u308b\u305f\u3081\u306e\u30d8\u30c3\u30c0\u3067\u3059\u3002<\/li>\n<li><strong>Subject<\/strong><br \/>\n\u30e1\u30fc\u30eb\u306e\u300c\u4ef6\u540d\u300d\u3092\u8868\u3059\u30d8\u30c3\u30c0\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u30d8\u30c3\u30c0\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc5322\" rel=\"noopener\" target=\"_blank\">RFC5322\uff08\u30e1\u30c3\u30bb\u30fc\u30b8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff09<\/a>\u3084<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc2046\" rel=\"noopener\" target=\"_blank\">RFC2046\uff08MIME\u30bf\u30a4\u30d7\uff09<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u3055\u3044\u3054\u306b<\/h3>\n<p>\u4eca\u56de\u3054\u7d39\u4ecb\u3057\u305f\u3082\u306e\u4ee5\u5916\u306b\u3082\u3001\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u306f\u6a19\u6e96\u4ed5\u69d8\u3067\u5b9a\u3081\u3089\u308c\u3066\u3044\u308b\u3082\u306e\u3084\u3001\u6a19\u6e96\u4ed5\u69d8\u306b\u306f\u306a\u3044\u304c\u30c7\u30d5\u30a1\u30af\u30c8\u30b9\u30bf\u30f3\u30c0\u30fc\u30c9\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u3001\u63a8\u5968\u3055\u308c\u3066\u3044\u306a\u3044\u3082\u306e\u306a\u3069\u6570\u591a\u304f\u306e\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u30d8\u30c3\u30c0\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc2076\" rel=\"noopener\" target=\"_blank\">RFC2076<\/a>\u306b\u3082\u307e\u3068\u3081\u3089\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u8208\u5473\u306e\u3042\u308b\u65b9\u306f\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306b\u306f\u3069\u3093\u306a\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3054\u5b58\u3058\u3067\u3059\u304b\uff1f \u3053\u3053\u304b\u3089\u4f55\u304c\u308f\u304b\u308b\u304b\u3092\u77e5\u3063\u3066\u304a\u304f\u3068\u3001\u30e1\u30fc\u30eb\u914d\u4fe1\u3067\u30c8\u30e9\u30d6\u30eb\u304c\u8d77\u304d\u305f\u6642\u306b\u5f79\u7acb\u3064\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u4eca\u56de\u306f\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u306e\u898b\u65b9\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002 \u30e1\u30fc\u30eb\u30d8 <a class=\"read-more\" href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=9949\">&#8230;\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":2,"featured_media":17043,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-9949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/9949","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9949"}],"version-history":[{"count":12,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/9949\/revisions"}],"predecessor-version":[{"id":17742,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/9949\/revisions\/17742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/media\/17043"}],"wp:attachment":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}