{"id":19226,"date":"2025-07-03T11:30:34","date_gmt":"2025-07-03T02:30:34","guid":{"rendered":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=19226"},"modified":"2025-11-27T16:26:59","modified_gmt":"2025-11-27T07:26:59","slug":"%e3%83%97%e3%83%ac%e3%83%bc%e3%83%b3%e3%83%86%e3%82%ad%e3%82%b9%e3%83%88%e3%83%a1%e3%83%bc%e3%83%ab%e3%81%a8%e3%81%af%ef%bc%9fhtml%e3%81%a8%e3%81%ae%e9%81%95%e3%81%84%e3%82%84%e3%83%a1%e3%83%aa","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=19226","title":{"rendered":"\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068\u306f\uff1fHTML\u3068\u306e\u9055\u3044\u3084\u30e1\u30ea\u30c3\u30c8\u3082\u89e3\u8aac\uff01"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/20250703_blog.png\" alt=\"\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068\u306f\uff1fHTML\u3068\u306e\u9055\u3044\u3084\u30e1\u30ea\u30c3\u30c8\u3082\u89e3\u8aac\uff01\" width=\"100%\" class=\"aligncenter size-full wp-image-19227\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/20250703_blog.png 650w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/20250703_blog-300x185.png 300w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/20250703_blog-225x139.png 225w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/p>\n<blockquote>\n<p>\u3053\u306e\u8a18\u4e8b\u306f <a href=\"https:\/\/www.twilio.com\/en-us\/blog\/insights\/plain-text-email\" target=\"_blank\">What is a plain text email (and how to use it)?<\/a> \u306e\u6284\u8a33\u3067\u3059\u3002<\/p>\n<\/blockquote>\n<p>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\uff08\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\uff09\u3068\u805e\u304f\u3068\u3001\u3069\u306e\u3088\u3046\u306a\u30e1\u30fc\u30eb\u3092\u601d\u3044\u6d6e\u304b\u3079\u307e\u3059\u304b\uff1f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u95a2\u9023\u306e\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u3092\u57cb\u3081\u8fbc\u3093\u3060\u3001\u4e0a\u53f8\u5b9b\u306e\u77ed\u3044\u30e1\u30fc\u30eb\u3067\u3057\u3087\u3046\u304b\uff1f\u305d\u308c\u3068\u3082\u3001\u5b50\u4f9b\u306e\u5199\u771f\u3092\u8f09\u305b\u305f\u3001\u53cb\u4eba\u5b9b\u306e\u30e1\u30fc\u30eb\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u308c\u3089\u306e\u30e1\u30fc\u30eb\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u5f62\u5f0f\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068\u306f\u4f55\u304b\u3001\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u4f55\u304b\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068\u306f\uff1f<\/h3>\n<p>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306f\u3001\u30c6\u30ad\u30b9\u30c8\u306e\u307f\u3067\u4f5c\u3089\u308c\u305f\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u5f62\u5f0f\u306e\u30e1\u30fc\u30eb\u3067\u3059\u3002\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u3084\u753b\u50cf\u3001\u30dc\u30bf\u30f3\u3001\u88c5\u98fe\uff08\u592a\u5b57\u3084\u4e0b\u7dda\uff09\u4ed8\u304d\u306e\u30c6\u30ad\u30b9\u30c8\u306a\u3069\u306f\u5229\u7528\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h4>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8 vs. HTML<\/h4>\n<p>\u4ee5\u4e0b\u306b\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068HTML\u30e1\u30fc\u30eb\u306e\u7279\u5fb4\u3068\u4f8b\u3092\u305d\u308c\u305e\u308c\u793a\u3057\u307e\u3059\u3002<\/p>\n<h5>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb<\/h5>\n<p>\u4e0a\u8ff0\u306e\u901a\u308a\u3001\u30c6\u30ad\u30b9\u30c8\u306e\u307f\u3067\u69cb\u6210\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3067\u3059\u3002<br \/>\n\u8996\u899a\u7684\u306b\u60c5\u5831\u3092\u4f1d\u3048\u308b\u3053\u3068\u304c\u96e3\u3057\u3044\u305f\u3081\u3001\u4f5c\u6210\u6642\u306b\u306f\u5de5\u592b\u304c\u5fc5\u8981\u3067\u3059\u3002\u5185\u5bb9\u306f\u7c21\u6f54\u3067\u5206\u304b\u308a\u3084\u3059\u304f\u3001\u6bb5\u843d\u9593\u306b\u7a7a\u767d\u884c\u3092\u5165\u308c\u308b\u306a\u3069\u3057\u3066\u3001\u6587\u7ae0\u3092\u8aad\u307f\u3084\u3059\u304f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed.png\" alt=\"\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\" width=\"100%\" class=\"aligncenter size-full wp-image-19228\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed.png 594w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-292x300.png 292w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<h5>HTML\u30e1\u30fc\u30eb<\/h5>\n<p>Gmail\u306e\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3\u30bf\u30d6\u306b\u632f\u308a\u5206\u3051\u3089\u308c\u305f\u30e1\u30fc\u30eb\u3092\u898b\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u591a\u5f69\u306a\u753b\u50cf\u304c\u6bb5\u7d44\u307f\u3067\u30ec\u30a4\u30a2\u30a6\u30c8\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3084\u3001\u8272\u3001\u30d5\u30a9\u30f3\u30c8\u3001\u30dc\u30bf\u30f3\u306a\u3069\u3001\u898b\u305f\u76ee\u304c\u5de5\u592b\u3055\u308c\u305f\u30e1\u30fc\u30eb\u304c\u898b\u3064\u304b\u308b\u3067\u3057\u3087\u3046\u3002\u3053\u308c\u3089\u306fHTML\uff08Hyper Text Markup Language\uff09\u3068\u3044\u3046\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3092\u69cb\u7bc9\u3059\u308b\u969b\u306b\u4f7f\u308f\u308c\u308b\u8a00\u8a9e\u3067\u66f8\u304b\u308c\u305f\u30e1\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<p>HTML\u30e1\u30fc\u30eb\u3067\u306f\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3068\u540c\u69d8\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8868\u73fe\u3084\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u6bb5\u7d44\u307f<\/li>\n<li>\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u3084\u30dc\u30bf\u30f3\u306e\u633f\u5165<\/li>\n<li>\u592a\u5b57\u3001\u659c\u4f53\u3001\u4e0b\u7dda\u306a\u3069\u306e\u6587\u5b57\u88c5\u98fe<\/li>\n<li>\u7b87\u6761\u66f8\u304d\u3084\u756a\u53f7\u4ed8\u304d\u30ea\u30b9\u30c8<\/li>\n<li>\u6587\u5b57\u8272\u3084\u80cc\u666f\u8272\u306e\u5909\u66f4<\/li>\n<li>\u753b\u50cf\u306e\u633f\u5165<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u306e<a href=\"https:\/\/www.twilio.com\/en-us\/lp\/consumer-preferences-report\" rel=\"noopener\" target=\"_blank\">Twilio\u306e\u6d88\u8cbb\u8005\u610f\u5411\u8abf\u67fb\u30ec\u30dd\u30fc\u30c8<\/a>\u306e\u30e1\u30fc\u30eb\u3067\u306f\u3001\u69d8\u3005\u306a\u8272\u3084\u753b\u50cf\u3001CTA\u30dc\u30bf\u30f3\u304c\u4f7f\u7528\u3055\u308c\u3066\u304a\u308a\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=15742\" rel=\"noopener\" target=\"_blank\">\u9069\u5207\u306b\u30c7\u30b6\u30a4\u30f3\u3055\u308c\u305f\u826f\u3044HTML\u30e1\u30fc\u30eb<\/a>\u306e\u4f8b\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-1.png\" alt=\"HTML\u30e1\u30fc\u30eb\" width=\"100%\" class=\"aligncenter size-full wp-image-19229\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-1.png 626w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-1-208x300.png 208w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><\/p>\n<h3>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306e\u30e1\u30ea\u30c3\u30c8<\/h3>\n<p>HTML\u30e1\u30fc\u30eb\u306e\u65b9\u304c\u8c4a\u304b\u306a\u8868\u73fe\u304c\u53ef\u80fd\u306a\u306e\u306b\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u5229\u7528\u3059\u308b\u610f\u5473\u306f\u3042\u308b\u306e\u304b\uff1f\u3068\u7591\u554f\u306b\u601d\u3046\u65b9\u304c\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306b\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u3060\u304b\u3089\u3053\u305d\u306e\u91cd\u8981\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u3042\u3089\u3086\u308b\u30c7\u30d0\u30a4\u30b9\u3067\u8868\u793a\u3067\u304d\u308b<\/strong><br \/>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306e\u5834\u5408\u3001\u3069\u306e\u30c7\u30d0\u30a4\u30b9\u3067\u3082\u898b\u3048\u65b9\u306f\u5909\u308f\u3089\u306a\u3044\u305f\u3081\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u306f\u4e0d\u8981\u3067\u3059\u3002\u307e\u305f\u3001Apple Watch\u3084IoT\u30c7\u30d0\u30a4\u30b9\u306a\u3069\u3001HTML\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30c7\u30d0\u30a4\u30b9\u3067\u3082\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u8aad\u307f\u8fbc\u307f\u304c\u901f\u3044<\/strong><br \/>\u9ad8\u89e3\u50cf\u5ea6\u306e\u753b\u50cf\u3084GIF\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u3092\u542b\u3080HTML\u30e1\u30fc\u30eb\u3068\u306f\u7570\u306a\u308a\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u306f\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5c0f\u3055\u3044\u305f\u3081\u3001\u3059\u3070\u3084\u304f\u8aad\u307f\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <\/li>\n<li><strong>\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u306b\u512a\u308c\u3066\u3044\u308b<\/strong><br \/>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306f\u97f3\u58f0\u8aad\u307f\u4e0a\u3052\u30bd\u30d5\u30c8\u304c\u30c6\u30ad\u30b9\u30c8\u3092\u6b63\u78ba\u306b\u51e6\u7406\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u76ee\u306e\u4e0d\u81ea\u7531\u306a\u65b9\u306b\u3082\u91cd\u8981\u306a\u60c5\u5831\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u4f1d\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <\/li>\n<li><strong>\u5230\u9054\u6027\u306e\u5411\u4e0a\u304c\u898b\u8fbc\u3081\u308b<\/strong><br \/>ISP\u306f\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u5f62\u5f0f\u3067\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3092\u597d\u3080\u50be\u5411\u304c\u3042\u308b\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30e1\u30fc\u30eb\u304c\u53d7\u4fe1\u30c8\u30ec\u30a4\u306b\u5c4a\u304f\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306b\u6d3b\u7528\u3059\u308b\u306b\u306f<\/h3>\n<p>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306f\u3001\u4ee5\u4e0b\u306e\u753b\u50cf\u306e\u3088\u3046\u306b\u3001\u9818\u53ce\u66f8\u3084\u6ce8\u6587\u78ba\u8a8d\u3068\u3044\u3063\u305f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u3068\u3057\u3066\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u306e\u5411\u4e0a\u3092\u76ee\u7684\u3068\u3057\u305f\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u4f7f\u7528\u3057\u305f\u8a18\u9332\u3092\u6b8b\u3059\u3053\u3068\u304c\u76ee\u7684\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-2.png\" alt=\"\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u306b\u6d3b\u7528\u3059\u308b\u306b\u306f\" width=\"75%\" class=\"aligncenter size-full wp-image-19230\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-2.png 604w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-2-300x191.png 300w\" sizes=\"(max-width: 604px) 100vw, 604px\" \/><\/p>\n<p>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u304c\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u76ee\u7684\u3067\u3042\u307e\u308a\u4f7f\u308f\u308c\u306a\u3044\u7406\u7531\u306f\u3001\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u306e\u8ffd\u8de1\u304c\u96e3\u3057\u3044\u305f\u3081\u3067\u3059\u3002\u30ea\u30f3\u30af\u306b\u8ffd\u8de1\u7528\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4ed8\u3051\u308b\u3068URL\u304c\u9577\u304f\u306a\u308a\u3001\u898b\u305f\u76ee\u304c\u60aa\u304f\u306a\u308b\u305f\u3081\u3001\u30af\u30ea\u30c3\u30af\u7387\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3068\u3001\u8ab0\u304c\u3069\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u95a2\u5fc3\u3092\u6301\u3063\u3066\u3044\u308b\u304b\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u30d6\u30e9\u30f3\u30c9\u306b\u3088\u3063\u3066\u306f\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u304c\u9069\u3057\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30d0\u30c3\u30af\u30d1\u30c3\u30ab\u30fc\u5411\u3051\u306e\u30d3\u30b8\u30cd\u30b9\u3092\u884c\u3046\u4f1a\u793e\u3067\u3042\u308c\u3070\u3001\u9867\u5ba2\u304c\u5c71\u4e2d\u306a\u3069\u96fb\u6ce2\u306e\u5c4a\u304d\u306b\u304f\u3044\u5834\u6240\u306b\u3044\u308b\u53ef\u80fd\u6027\u3092\u8003\u616e\u3057\u3001\u30c7\u30fc\u30bf\u5bb9\u91cf\u306e\u5c11\u306a\u3044\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u9001\u3063\u305f\u307b\u3046\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h4>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u98a8\u306eHTML\u30e1\u30fc\u30eb<\/h4>\n<p>\u30de\u30fc\u30b1\u30bf\u30fc\u304c\u3088\u304f\u4f7f\u3046\u30c6\u30af\u30cb\u30c3\u30af\u306e\u4e00\u3064\u306b\u3001HTML\u30e1\u30fc\u30eb\u3092\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306e\u3088\u3046\u306b\u898b\u305b\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u7c21\u7d20\u5316\u3057\u3066\u8996\u899a\u7684\u8981\u7d20\u3092\u6975\u529b\u7701\u304d\u3001\u30ea\u30f3\u30af\u30821\uff5e2\u500b\u3057\u304b\u633f\u5165\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u30e1\u30fc\u30eb\u306b\u306f\u5b9f\u969b\u306b\u4eba\u304c\u66f8\u3044\u305f\u3088\u3046\u306a\u6e29\u304b\u307f\u304c\u3042\u308b\u305f\u3081\u3001\u9867\u5ba2\u306e\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u306e\u5411\u4e0a\u306b\u52b9\u679c\u7684\u3067\u3059\u3002\u4f8b\u3068\u3057\u3066\u3001<a href=\"https:\/\/neilpatel.com\/\" rel=\"noopener\" target=\"_blank\">Neil Patel<\/a>\u304c\u9001\u4fe1\u3057\u305f\u4ee5\u4e0b\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u30e1\u30fc\u30eb\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb\u3067\u306f\u306a\u304f\u3001\u53cb\u4eba\u3084\u540c\u50da\u304b\u3089\u9001\u3089\u308c\u3066\u304d\u305f\u30e1\u30fc\u30eb\u306e\u3088\u3046\u306b\u611f\u3058\u3089\u308c\u307e\u3059\u3002\u3057\u304b\u3082\u3001\u5b9f\u969b\u306fHTML\u30e1\u30fc\u30eb\u306a\u306e\u3067\u3001\u30af\u30ea\u30c3\u30af\u7387\u306e\u6e2c\u5b9a\u306a\u3069\u306f\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-3.png\" alt=\"\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u98a8\u306eHTML\u30e1\u30fc\u30eb\" width=\"100%\" class=\"aligncenter size-full wp-image-19231\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-3.png 670w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/unnamed-3-300x236.png 300w\" sizes=\"(max-width: 670px) 100vw, 670px\" \/><\/p>\n<h4>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5<\/h4>\n<p>\u5927\u62b5\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001\u8a2d\u5b9a\u3067\u7c21\u5358\u306b\u30e1\u30fc\u30eb\u5f62\u5f0f\u3092\u5909\u66f4\u53ef\u80fd\u3067\u3059\u3002\u4f8b\u3048\u3070Gmail\u306e\u5834\u5408\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u4f5c\u6210\u6642\u306b\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u3068HTML\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u4f5c\u6210\u753b\u9762\u306e\u30c4\u30fc\u30eb\u30d0\u30fc\u306e\u53f3\u5074\u306b\u3042\u308b\u4e09\u70b9\u30ea\u30fc\u30c0\u30fc\u3092\u30af\u30ea\u30c3\u30af\u3057\u3001\u300c\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e2\u30fc\u30c9\u300d\u3067ON\uff0fOFF\u3092\u5207\u308a\u66ff\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/16fdb49e8ea6145c7d1e17c334dd04e0.png\" alt=\"\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\" width=\"100%\" class=\"aligncenter size-full wp-image-19232\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/16fdb49e8ea6145c7d1e17c334dd04e0.png 2042w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/16fdb49e8ea6145c7d1e17c334dd04e0-293x300.png 293w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/16fdb49e8ea6145c7d1e17c334dd04e0-768x787.png 768w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2025\/07\/16fdb49e8ea6145c7d1e17c334dd04e0-999x1024.png 999w\" sizes=\"(max-width: 2042px) 100vw, 2042px\" \/><\/p>\n<p>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\uff08ESP\uff09\u3092\u3054\u5229\u7528\u306e\u5834\u5408\u3082\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002\u305f\u3044\u3066\u3044\u306eESP\u306f\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068HTML\u30e1\u30fc\u30eb\u306e\u4e21\u65b9\u3092\u542b\u3080\u300c<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=8262\" rel=\"noopener\" target=\"_blank\">\u30de\u30eb\u30c1\u30d1\u30fc\u30c8\u30e1\u30fc\u30eb<\/a>\u300d\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002\u3069\u3061\u3089\u306e\u30e1\u30fc\u30eb\u3092\u8868\u793a\u3059\u308b\u304b\u306f\u53d7\u4fe1\u8005\u5074\u306e\u8a2d\u5b9a\u6b21\u7b2c\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u306f\u591a\u304f\u306e\u5834\u5408\u3001\u53d7\u4fe1\u5074\u3067\u81ea\u52d5\u7684\u306bHTML\u306b\u5909\u63db\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002Twilio SendGrid\u304b\u3089\u9001\u4fe1\u3059\u308b\u30e1\u30fc\u30eb\u304c\u81ea\u52d5\u5909\u63db\u3055\u308c\u308b\u306e\u3092\u56de\u907f\u3057\u305f\u3044\u5834\u5408\u306f\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/docs\/API_Reference\/Web_API_v3\/Mail\/index.html\" rel=\"noopener\" target=\"_blank\">API\u30ea\u30af\u30a8\u30b9\u30c8<\/a>\u306e\u300ccontent-type\u300d\u3092\u300ctext\/plain\u300d\u306b\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e1\u30fc\u30eb\u672c\u6587\u304c\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u3042\u308b\u3053\u3068\u3092\u660e\u793a\u3067\u304d\u3001\u53d7\u4fe1\u5074\u3067\u81ea\u52d5\u5909\u63db\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u3068HTML\u306e\u3069\u3061\u3089\u3092\u9078\u3076\u3079\u304d\u304b<\/h3>\n<p>\u591a\u304f\u306e\u4eba\u306b\u3068\u3063\u3066\u306f\u3001HTML\u30e1\u30fc\u30eb\u306e\u65b9\u304c\u597d\u307e\u3057\u3044\u3067\u3057\u3087\u3046\u3002\u9b45\u529b\u7684\u306a\u30e1\u30fc\u30eb\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u9078\u629e\u80a2\u304c\u8c4a\u5bcc\u306a\u3046\u3048\u3001\u30a8\u30f3\u30b2\u30fc\u30b8\u30e1\u30f3\u30c8\u306e\u6e2c\u5b9a\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u3082\u3001\u8aad\u307f\u8fbc\u307f\u304c\u901f\u3044\u3001\u53d7\u4fe1\u30c8\u30ec\u30a4\u3078\u306e\u5230\u9054\u6027\u304c\u9ad8\u307e\u308b\u306a\u3069\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u305f\u3081\u3001\u4e00\u6982\u306b\u3069\u3061\u3089\u304c\u826f\u3044\u3068\u65ad\u8a00\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u6700\u3082\u826f\u3044\u65b9\u6cd5\u306f\u3001\u5b9f\u969b\u306b\u9867\u5ba2\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u53cd\u5fdc\u3092\u898b\u308b\u3053\u3068\u3067\u3059\u3002\u3069\u3061\u3089\u306e\u5f62\u5f0f\u306e\u30e1\u30fc\u30eb\u304c\u597d\u307e\u308c\u308b\u304b\u3092\u78ba\u304b\u3081\u3001\u9867\u5ba2\u306b\u5408\u3063\u305f\u5f62\u5f0f\u3067\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5c4a\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>SendGrid\u306b\u306f\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/about\/email-api\/\" rel=\"noopener\" target=\"_blank\">\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb<\/a>\u304b\u3089<a href=\"https:\/\/sendgrid.kke.co.jp\/about\/email-marketing\/\" rel=\"noopener\" target=\"_blank\">\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb<\/a>\u307e\u3067\u3042\u3089\u3086\u308b\u7a2e\u985e\u306e\u30e1\u30fc\u30eb\u914d\u4fe1\u306b\u9069\u3057\u305f\u6a5f\u80fd\u304c\u63c3\u3063\u3066\u3044\u307e\u3059\u3002\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\u3068HTML\u30e1\u30fc\u30eb\u3092\u540c\u6642\u306b\u9001\u308b\u30de\u30eb\u30c1\u30d1\u30fc\u30c8\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u3082\u53ef\u80fd\u3067\u3059\u3002\u305c\u3072\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u53d6\u5f97\u3057\u3066\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306f What is a plain text email (and how to use it)? \u306e\u6284\u8a33\u3067\u3059\u3002 \u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\uff08\u30c6\u30ad\u30b9\u30c8\u30e1\u30fc\u30eb\uff09\u3068\u805e\u304f\u3068\u3001\u3069\u306e\u3088\u3046\u306a\u30e1\u30fc\u30eb\u3092\u601d\u3044\u6d6e\u304b\u3079\u307e\u3059\u304b\uff1f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8 <a class=\"read-more\" href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=19226\">&#8230;\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":2,"featured_media":19227,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-19226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-best-practices"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/19226","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=19226"}],"version-history":[{"count":6,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/19226\/revisions"}],"predecessor-version":[{"id":19796,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/19226\/revisions\/19796"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/media\/19227"}],"wp:attachment":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}