{"id":20422,"date":"2026-04-02T11:30:00","date_gmt":"2026-04-02T02:30:00","guid":{"rendered":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=20422"},"modified":"2026-04-06T18:43:48","modified_gmt":"2026-04-06T09:43:48","slug":"twilio-sendgrid%e3%81%ae%e3%83%88%e3%83%a9%e3%83%b3%e3%82%b6%e3%82%af%e3%82%b7%e3%83%a7%e3%83%b3%e3%83%a1%e3%83%bc%e3%83%ab%e3%81%ab%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92%e6%b7%bb%e4%bb%98","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=20422","title":{"rendered":"Twilio SendGrid\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2026\/04\/20260402_blog.png\" alt=\"Twilio SendGrid\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3059\u308b\u65b9\u6cd5\" width=\"100%\" class=\"aligncenter size-full\" \/><\/p>\n<h3>\u306f\u3058\u3081\u306b<\/h3>\n<p>Gmail\u306a\u3069\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u306f\u753b\u9762\u64cd\u4f5c\u3067\u7c21\u5358\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3067\u304d\u307e\u3059\u304c\u3001Twilio SendGrid\u306eWeb API\u3084SMTP\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3059\u308b\u5834\u5408\u3001\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3084\u30b3\u30de\u30f3\u30c9\u306f\u6b63\u3057\u3044\u306f\u305a\u306a\u306e\u306b\u3001\u300c\u30d5\u30a1\u30a4\u30eb\u304c\u6587\u5b57\u5316\u3051\u3057\u3066\u3057\u307e\u3046\u300d\u300c\u30d5\u30a1\u30a4\u30eb\u304c\u7834\u640d\u3057\u3066\u958b\u3051\u306a\u3044\u300d\u300c\u672c\u6587\u5185\u306b\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u306a\u3044\u300d\u3068\u3044\u3063\u305f\u554f\u984c\u306b\u3076\u3064\u304b\u308a\u304c\u3061\u3067\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u57fa\u790e\u77e5\u8b58\u3092\u89e3\u8aac\u3057\u305f\u3046\u3048\u3067\u3001Twilio SendGrid\u306b\u304a\u3051\u308b\u5177\u4f53\u7684\u306a\u30d5\u30a1\u30a4\u30eb\u306e\u6dfb\u4ed8\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306a\u3069\u306b\u304a\u5f79\u7acb\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u57fa\u790e\u77e5\u8b58<\/h3>\n<h4>\u30e1\u30fc\u30eb\u3067\u975eASCII\u6587\u5b57\u3092\u6271\u3046\u305f\u3081\u306e\u4ed5\u7d44\u307f<\/h4>\n<p>\u767b\u5834\u5f53\u6642\u306eSMTP\u3067\u306f\u3001ASCII\u6587\u5b57\uff08\u82f1\u6570\u5b57\u3084\u8a18\u53f7\u30927bit\u306e\u6570\u5024\u3067\u8868\u73fe\u3059\u308b\u6587\u5b57\u30b3\u30fc\u30c9\uff09\u3057\u304b\u9001\u4fe1\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u3053\u308c\u3092\u62e1\u5f35\u3057\u3066\u3001\u65e5\u672c\u8a9e\u306a\u3069\u306e\u975eASCII\u6587\u5b57\u3084\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u3092\u6271\u3048\u308b\u3088\u3046\u306b\u3057\u305f\u306e\u304c<strong>MIME<\/strong>\u3067\u3059\u3002<\/p>\n<p>MIME\u306f\u4e0b\u56f3\u306e\u3088\u3046\u306a\u30de\u30eb\u30c1\u30d1\u30fc\u30c8\u69cb\u9020\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u5883\u754c\u7dda\u3067\u30d1\u30fc\u30c8\u3092\u533a\u5207\u308a\u306a\u304c\u3089\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u7570\u306a\u308b\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u7dd2\u306b\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2026\/04\/01_MIME.png\" alt=\"MIME\" width=\"60%\" class=\"aligncenter size-full\" \/><\/p>\n<p>MIME\u306e\u5404\u30d1\u30fc\u30c8\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d8\u30c3\u30c0\u60c5\u5831\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li>Content-Type\uff1a\u30c7\u30fc\u30bf\u306e\u7a2e\u985e\uff08\u300ctext\/html\u300d\u300capplication\/pdf\u300d\u306a\u3069\uff09<\/li>\n<li>charset\uff1a\u6587\u5b57\u30b3\u30fc\u30c9\uff08\u300cUTF-8\u300d\u300cISO-2022-JP\u300d\u306a\u3069\uff09<\/li>\n<li>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\uff08\u300cBase64\u300d\u300cQuoted-printable\u300d\u306a\u3069\uff09<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u30d8\u30c3\u30c0\u60c5\u5831\u306f\u3001\u5b9b\u5148\u5074\u3067\u53d7\u3051\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u3092\u6b63\u3057\u304f\u89e3\u91c8\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<h4>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u30a8\u30f3\u30b3\u30fc\u30c9<\/h4>\n<p>\u753b\u50cf\u3084\u97f3\u58f0\u306a\u3069\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u30010\u30681\u306e2\u9032\u6570\u3067\u69cb\u6210\u3055\u308c\u305f8bit\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3067\u3059\u3002\u3082\u3068\u3082\u3068\u30e1\u30fc\u30eb\u306e\u4e16\u754c\u3067\u306f7bit\u306e\u30c7\u30fc\u30bf\u306e\u307f\u3092\u6271\u3063\u3066\u3044\u305f\u305f\u3081\u30018bit\u306e\u30c7\u30fc\u30bf\u306f\u305d\u306e\u307e\u307e\u3067\u306f\u6b63\u3057\u304f\u89e3\u91c8\u3067\u304d\u305a\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u7834\u640d\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092<strong>Base64<\/strong>\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3067\u6271\u3044\u3084\u3059\u3044ASCII\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u305f\u3046\u3048\u3067\u9001\u4fe1\u3057\u307e\u3059\u3002<br \/>\n\u4ed6\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u3068\u3057\u3066quoted-printable\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u4e3b\u306b\u975eASCII\u6587\u5b57\u306e\u30c6\u30ad\u30b9\u30c8\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u5408\u306fBase64\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<h4>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u8868\u793a\u65b9\u6cd5<\/h4>\n<p>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u8868\u793a\u65b9\u6cd5\u306b\u306f\u300cattachment\uff08\u4e0b\u56f3\u5de6\uff09\u300d\u3068\u300cinline\uff08\u4e0b\u56f3\u53f3\uff09\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u53d7\u4fe1\u5074\u3067attachment\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8868\u793a\u3059\u308b\u306b\u306f\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3068\u3044\u3063\u305f\u4f55\u3089\u304b\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u3067\u3059\u3002\u4e00\u65b9\u3001inline\u306e\u30d5\u30a1\u30a4\u30eb\u306f\u81ea\u52d5\u7684\u306b\u672c\u6587\u5185\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u672c\u6587\u5185\u306b\u753b\u50cf\u3092\u57cb\u3081\u8fbc\u3080\u5834\u5408\u306a\u3069\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2026\/04\/02_attachment_inline.png\" alt=\"\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u8868\u793a\u65b9\u6cd5\" width=\"100%\" class=\"aligncenter size-full\" \/><\/p>\n<h3>SendGrid\u3067\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u9001\u4fe1\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u57fa\u790e\u77e5\u8b58\u3092\u5f97\u305f\u3068\u3053\u308d\u3067\u3001\u5b9f\u969b\u306bSendGrid\u3067\u8a66\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h4>\u30d5\u30a1\u30a4\u30eb\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b<\/h4>\n<p>\u4e8b\u524d\u6e96\u5099\u3068\u3057\u3066\u3001\u6dfb\u4ed8\u3057\u305f\u3044\u30d5\u30a1\u30a4\u30eb\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001OS\u306e\u6a19\u6e96\u6a5f\u80fd\u3092\u5229\u7528\u3057\u3066\u7c21\u5358\u306b\u30a8\u30f3\u30b3\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\uff1cWindows\u306e\u5834\u5408\uff1e<br \/>\n\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3067certutil\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; title: ; notranslate\" title=\"\">certutil -encode \u5165\u529b\u30d5\u30a1\u30a4\u30eb\u540d \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d<\/pre>\n<p>\uff1cmacOS\u3084Linux\u306e\u5834\u5408\uff1e<br \/>\n\u30bf\u30fc\u30df\u30ca\u30eb\u3067base64\u30b3\u30de\u30f3\u30c9\u3084openssl\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; title: ; notranslate\" title=\"\">base64 -i \u5165\u529b\u30d5\u30a1\u30a4\u30eb\u540d &gt; \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d<\/pre>\n<pre class=\"brush: bash; title: ; notranslate\" title=\"\">openssl base64 -in \u5165\u529b\u30d5\u30a1\u30a4\u30eb\u540d -out \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d<\/pre>\n<p>\u300c\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u540d\u300d\u306b\u306f\u3001PDF\u30d5\u30a1\u30a4\u30eb\u3084\u753b\u50cf\u306a\u3069\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u3044\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u300c\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d\u300d\u306b\u306f\u300coutput.txt\u300d\u306a\u3069\u4efb\u610f\u306e\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u7d50\u679c\u306e\u6587\u5b57\u5217\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3092\u30b3\u30d4\u30fc\u3057\u3066\u30e1\u30fc\u30eb\u9001\u4fe1\u3067\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<h4>SendGrid\u3067\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u9001\u4fe1\u3059\u308b<\/h4>\n<p>\u521d\u3081\u3066SendGrid\u3092\u4f7f\u3046\u65b9\u306f\u3001<a href=\"https:\/\/sendgrid.kke.co.jp\/docs\/Tutorials\/A_Transaction_Mail\/manage_api_key.html#-Generate\" target=\"_blank\">API\u30ad\u30fc\u306e\u4f5c\u6210<\/a>\uff08Mail Send\u306eFull Access\u6a29\u9650\u304c\u3042\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\uff09\u3084\u9001\u4fe1\u5143\u30c9\u30e1\u30a4\u30f3\u3067\u306e<a href=\"https:\/\/sendgrid.kke.co.jp\/docs\/Tutorials\/D_Improve_Deliverability\/using_whitelabel.html#-Domain-Whitelabel\" target=\"_blank\">Domain Authentication\u306e\u8a2d\u5b9a<\/a>\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u6e96\u5099\u304c\u3067\u304d\u305f\u3089\u3001\u4ee5\u4e0b\u3092\u53c2\u8003\u306b\u300cPDF\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3057\u3001\u753b\u50cf\u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u8868\u793a\u3059\u308b\u30e1\u30fc\u30eb\u300d\u3092\u9001\u4fe1\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\uff1cWeb API\u306e\u5834\u5408\uff1e<br \/>\n<a href=\"https:\/\/sendgrid.kke.co.jp\/docs\/API_Reference\/Web_API_v3\/Mail\/index.html\" target=\"_blank\">Mail Send API<\/a>\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aJSON\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; title: ; notranslate\" title=\"\">\n{\n  &quot;personalizations&quot;: &#x5B;\n    {\n      &quot;to&quot;: &#x5B;\n        { &quot;email&quot;: &quot;to@example.com&quot; }\n      ],\n      &quot;subject&quot;: &quot;\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u30c6\u30b9\u30c8&quot;\n    }\n  ],\n  &quot;from&quot;: { &quot;email&quot;: &quot;from@example.com&quot; },\n  &quot;content&quot;: &#x5B;\n    {\n      &quot;type&quot;: &quot;text\/html&quot;,\n      &quot;value&quot;: &quot;\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u30c6\u30b9\u30c8\u3067\u3059\u3002&lt;br \/&gt; &lt;img src=&#039;cid:image01&#039;&gt;&lt;br \/&gt;\u682a\u5f0f\u4f1a\u793e\u69cb\u9020\u8a08\u753b\u7814\u7a76\u6240 SendGrid\u30b5\u30dd\u30fc\u30c8\u30c1\u30fc\u30e0&quot;\n    }\n  ],\n  &quot;attachments&quot;: &#x5B;\n    {\n        &quot;type&quot;: &quot;application\/pdf&quot;,\n        &quot;filename&quot;: &quot;test.pdf&quot;,\n        &quot;disposition&quot;: &quot;attachment&quot;,\n        &quot;content&quot;: &quot;PDF\u30d5\u30a1\u30a4\u30eb\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217&quot;\n    },\n    {\n        &quot;type&quot;: &quot;image\/png&quot;,\n        &quot;filename&quot;: &quot;test.png&quot;,\n        &quot;disposition&quot;: &quot;inline&quot;,\n        &quot;content_id&quot;:&quot;image01&quot;,\n        &quot;content&quot;: &quot;PNG\u30d5\u30a1\u30a4\u30eb\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217&quot;\n    }\n  ]\n}\n<\/pre>\n<p>attachments\u914d\u5217\u306e\u8981\u7d20\u3068\u3057\u3066\u3001PDF\u30d5\u30a1\u30a4\u30eb\u3068PNG\u30d5\u30a1\u30a4\u30eb\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002content\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u306f\u3001\u5148\u307b\u3069Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002PNG\u30d5\u30a1\u30a4\u30eb\u3067\u6307\u5b9a\u3057\u305fcontent_id\u306f\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u8b58\u5225\u5b50\u3067\u3001\u672c\u6587\u5185\u306b\u305d\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u8868\u793a\u3059\u308b\u4f4d\u7f6e\u3092\u6c7a\u3081\u308b\u305f\u3081\u306b\u4f7f\u3044\u307e\u3059\u3002\u4e0a\u306e\u4f8b\u3067\u306f\u3001HTML\u30d1\u30fc\u30c8\u306e<span style=\"background-color: #d3d3d3;\">&lt;img&nbsp;src&equals;&apos;cid:image01&apos;&nbsp;\/&gt;<\/span>\u306e\u90e8\u5206\u306b\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\uff1cSMTP\u306e\u5834\u5408\uff1e<br \/>\n\u4ee5\u4e0b\u306e\u3088\u3046\u306a<a href=\"https:\/\/sendgrid.kke.co.jp\/docs\/Tutorials\/A_Transaction_Mail\/send_transaction_mail.html#-Telnet\" targe=\"_blank\">telnet\u30b3\u30de\u30f3\u30c9<\/a>\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u300c>\u300d\u3067\u59cb\u307e\u308b\u884c\u306f\u3054\u81ea\u8eab\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u4ed6\u306e\u884c\u306f\u30b5\u30fc\u30d0\u304b\u3089\u306e\u5fdc\u7b54\u3067\u3059\u3002<\/p>\n<pre class=\"brush: bash; title: ; notranslate\" title=\"\">\ntelnet smtp.sendgrid.net 587\n\n&gt; EHLO example.com\n250-smtp.sendgrid.net\n250-8BITMIME\n250-PIPELINING\n250-SIZE 31457280\n250-SMTPUTF8\n250-STARTTLS\n250-AUTH PLAIN LOGIN\n250 AUTH=PLAIN LOGIN\n&gt; auth login\n334 VXNlcm5hbWU6\n&gt; \u201capikey\u201d\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\n334 UGFzc3dvcmQ6\n&gt; API\u30ad\u30fc\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\n235 Authentication successful\n&gt; mail from: from@example.com\n250 Sender address accepted\n&gt; rcpt to: to@example.com\n250 Recipient address accepted\ndata\n354 Continue\n\nFrom: from@example.com\nTo: to@example.com\nSubject: =?UTF-8?B?\u4ef6\u540d\u3092MIME\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\nContent-Type: multipart\/related; boundary=b123456789\n\n--b123456789\nContent-Type: text\/html; charset=utf-8\nContent-Transfer-Encoding: base64\n\n\u672c\u6587\u306eHTML\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\n\n--b123456789\nContent-Type: application\/pdf; name=&quot;test.pdf&quot;\nContent-Transfer-Encoding: base64\nContent-Disposition: attachment; filename=&quot;test.pdf&quot;\n\nPDF\u30d5\u30a1\u30a4\u30eb\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\n\n--b123456789\nContent-Type: image\/png; name=&quot;test.png&quot;\nContent-Transfer-Encoding: base64\nContent-Disposition: inline; filename=&quot;test.png&quot;\nContent-ID: &lt;image01&gt;\n\nPNG\u30d5\u30a1\u30a4\u30eb\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\n\n.\n250 Ok: queued as xxxxx\n<\/pre>\n<p>\u5883\u754c\u7dda\uff08\u30d0\u30a6\u30f3\u30c0\u30ea\u3001\u4e0a\u306e\u4f8b\u3067\u306f\u300cb123456789\u300d\uff09\u3067MIME\u306e\u30d1\u30fc\u30c8\u3092\u533a\u5207\u308a\u306a\u304c\u3089\u3001\u672c\u6587\u30fbPDF\u30d5\u30a1\u30a4\u30eb\u30fbPNG\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30fc\u30c8\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u30e1\u30fc\u30eb\u306e\u4ef6\u540d\u3084\u672c\u6587\u3001\u30d5\u30a1\u30a4\u30eb\u540d\u306b\u975eASCII\u6587\u5b57\u3092\u542b\u3080\u5834\u5408\u306f\u30a8\u30f3\u30b3\u30fc\u30c9\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\uff1c\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\u3092\u78ba\u8a8d\u3059\u308b\uff1e<br \/>\n\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u672c\u6587\u5185\u306bPNG\u30d5\u30a1\u30a4\u30eb\u304c\u8868\u793a\u3055\u308c\u3001PDF\u30d5\u30a1\u30a4\u30eb\u304c\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2026\/04\/image2.png\" alt=\"\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\" width=\"100%\" class=\"aligncenter size-full\" \/><\/p>\n<h3>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306e\u5236\u9650\u4e8b\u9805<\/h3>\n<p>\u5b9b\u5148\u30b5\u30fc\u30d0\u306b\u3088\u3063\u3066\u5236\u9650\u4e8b\u9805\u306f\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u4e00\u822c\u7684\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u30b5\u30a4\u30ba\u306e\u4e0a\u9650\uff08\u30d8\u30c3\u30c0\uff0b\u30dc\u30c7\u30a3\uff0b\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\uff09\u306f20MB\u3067\u3059\u3002SMTP\u3067\u30e1\u30fc\u30eb\u9001\u4fe1\u3059\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u4e0a\u9650\u3092\u8d85\u3048\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002Web API\u3067\u30e1\u30fc\u30eb\u9001\u4fe1\u3059\u308b\u5834\u5408\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u53ef\u80fd\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u30b5\u30a4\u30ba\u306e\u4e0a\u9650\u306f30MB\u3067\u3059\u3002\u8a73\u3057\u3044\u5236\u9650\u4e8b\u9805\u306f<a href=\"https:\/\/support.sendgrid.kke.co.jp\/hc\/ja\/articles\/202688609\" target=\"_blank\">\u3053\u3061\u3089<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<br \/>\n\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u5916\u90e8\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u3001\u30e1\u30fc\u30eb\u672c\u6587\u306b\u305d\u306e\u30ea\u30f3\u30af\u3092\u8a18\u8f09\u3059\u308b\u65b9\u6cd5\u304c\u304a\u52e7\u3081\u3067\u3059\u3002<\/p>\n<h3>\u307e\u3068\u3081<\/h3>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001SendGrid\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u3001MIME\u3084\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u3044\u3063\u305f\u57fa\u790e\u77e5\u8b58\u304b\u3089\u3001Web API\u3068SMTP\u3092\u4f7f\u3063\u305f\u5177\u4f53\u7684\u306a\u9001\u4fe1\u65b9\u6cd5\u307e\u3067\u3092\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<br \/>\n\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u3001\u66f8\u985e\u306e\u81ea\u52d5\u9001\u4ed8\u3084\u3001\u30a4\u30f3\u30e9\u30a4\u30f3\u753b\u50cf\u3092\u4f7f\u3063\u305f\u52d5\u7684\u306a\u30c7\u30b6\u30a4\u30f3\u3068\u3044\u3063\u305f\u69d8\u3005\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u305d\u306e\u3082\u306e\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u306e\u30ea\u30b9\u30af\u306b\u3082\u306a\u308a\u5f97\u307e\u3059\u306e\u3067\u3001\u9069\u5207\u306a\u5185\u5bb9\u3084\u30b5\u30a4\u30ba\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u9001\u308b\u3088\u3046\u306b\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b Gmail\u306a\u3069\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u306f\u753b\u9762\u64cd\u4f5c\u3067\u7c21\u5358\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3067\u304d\u307e\u3059\u304c\u3001Twilio SendGrid\u306eWeb API\u3084SMTP\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3059\u308b\u5834\u5408\u3001\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3084\u30b3\u30de\u30f3\u30c9\u306f\u6b63\u3057\u3044\u306f\u305a\u306a\u306e\u306b\u3001\u300c\u30d5\u30a1 <a class=\"read-more\" href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=20422\">&#8230;\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":2,"featured_media":20428,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11,8],"tags":[],"class_list":["post-20422","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical","category-product"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/20422","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=20422"}],"version-history":[{"count":50,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/20422\/revisions"}],"predecessor-version":[{"id":20564,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/20422\/revisions\/20564"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/media\/20428"}],"wp:attachment":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20422"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20422"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20422"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}