{"id":1308,"date":"2023-01-26T11:20:15","date_gmt":"2023-01-26T02:20:15","guid":{"rendered":"https:\/\/ec2-54-238-200-5.ap-northeast-1.compute.amazonaws.com\/blog\/?p=1308"},"modified":"2023-09-05T13:14:12","modified_gmt":"2023-09-05T04:14:12","slug":"smtp%e5%bf%9c%e7%ad%94%e3%82%b3%e3%83%bc%e3%83%89%e3%81%ae%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=1308","title":{"rendered":"SMTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\u306e\u57fa\u790e\u77e5\u8b58"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/01\/20230124_blog.png\" alt=\"SMTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\u306e\u57fa\u790e\u77e5\u8b58\" width=\"100%\" class=\"aligncenter size-full wp-image-16306\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/01\/20230124_blog.png 650w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2023\/01\/20230124_blog-300x185.png 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/p>\n<blockquote>\n<p>\u3053\u306e\u8a18\u4e8b\u306f <a href=\"https:\/\/sendgrid.com\/blog\/smtp-server-response-codes-explained\/\" target=\"_blank\">SMTP Server Response Codes: What Do They Mean?<\/a> \u306e\u6284\u8a33\u3067\u3059\u3002<\/p>\n<\/blockquote>\n<p>Twilio SendGrid\u3067\u306f\u3001\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb\u3084\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u3092\u6bce\u67081,000\u5104\u901a\u4ee5\u4e0a\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3068\u3053\u308d\u3067\u3001\u300c\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u300d\u3068\u306f\u5177\u4f53\u7684\u306b\u3069\u3046\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u304b\uff1f<br \/>\n\u305d\u308c\u306f\u3001SMTP\uff08Simple Message Transfer Protocol\uff09\u3092\u4f7f\u3063\u3066\u8907\u6570\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u9593\u3067\u306e\u901a\u4fe1\u3092\u884c\u3046\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u3042\u308b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304b\u3089\u5225\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3078\u3068<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=11638\" rel=\"noopener\" target=\"_blank\">SMTP\u30b5\u30fc\u30d0<\/a>\u3092\u7d4c\u7531\u3057\u3066\u30ea\u30ec\u30fc\u3055\u308c\u3001SMTP\u30b5\u30fc\u30d0\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u51e6\u7406\u7d50\u679c\u3092\u300c\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\u300d\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<p>\u5927\u62b5\u306f\u554f\u984c\u306a\u304f\u9001\u4fe1\u3055\u308c\u308b\u306e\u3067\u3059\u304c\u3001\u4f55\u304b\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u3068\u304d\u306f\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\u304b\u3089\u69d8\u3005\u306a\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u30e1\u30fc\u30eb\u9001\u4fe1\u3067\u3088\u304f\u898b\u304b\u3051\u308b\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\u306b\u3064\u3044\u3066\u3001\u4ee3\u8868\u7684\u306a\u3082\u306e\u3092\u4ee5\u4e0b\u306b\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p><strong>250<\/strong><br \/>\n\u4f55\u3082\u554f\u984c\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306f\u3001\u6b63\u5e38\u306b\u53d7\u4fe1\u30b5\u30fc\u30d0\u306b\u53d7\u3051\u4ed8\u3051\u3089\u308c\u307e\u3057\u305f\u3002<\/p>\n<p><strong>421<\/strong><br \/>\n\u53d7\u4fe1\u30b5\u30fc\u30d0\u3067\u4e00\u6642\u7684\u306a\u9045\u5ef6\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3059\u3002\u77ed\u671f\u9593\u306b\u63a5\u7d9a\u304c\u96c6\u4e2d\u3057\u305f\u304b\u3001\u30e1\u30fc\u30eb\u306e\u6570\u304c\u591a\u3059\u304e\u308b\u3068\u3044\u3063\u305f\u539f\u56e0\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>421 4.7.0 [GL01] Message from (X.X.X.X) temporarily deferred<\/li>\n<li>421 4.7.1 : (DYN:T1)http:\/\/postmaster.info.aol.com\/errors\/421dynt1.html (throttled)<\/li>\n<li>421 4.7.0 [GL01] Message from (X.X.X.X) temporarily deferred \u2013 4.16.50. Please refer to http:\/\/postmaster.yahoo.com\/errors\/postmaster-21.html<\/li>\n<\/ul>\n<p><strong>450<\/strong><br \/>\n\u914d\u4fe1\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u305f\u304b\u3001\u3082\u3057\u304f\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u3067\u304d\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>450 4.2.1 The user you are trying to contact is receiving mail too quickly. Please resend your message at a later time. If the user is able to receive mail at that time, your message will be delivered.<\/li>\n<li>450 too frequent connects from 198.37.147.135, please try again later. (throttled)<\/li>\n<\/ul>\n<p><strong>451<\/strong><br \/>\n\u914d\u4fe1\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u9001\u4fe1\u5074\u306e\u554f\u984c\u3067\u306f\u306a\u304f\u3001\u53d7\u4fe1\u5074\u306e\u30b5\u30fc\u30d0\u30a8\u30e9\u30fc\u304c\u539f\u56e0\u3067\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>451 mta1012.mail.gq1.yahoo.com Resources temporarily unavailable. Please try again later [#4.16.1].<\/li>\n<li>451 Temporary local problem \u2013 please try later<\/li>\n<\/ul>\n<p><strong>452<\/strong><br \/>\n\u30b7\u30b9\u30c6\u30e0\u30b9\u30c8\u30ec\u30fc\u30b8\u5bb9\u91cf\u304c\u4e0d\u8db3\u3057\u3066\u3044\u307e\u3059\u3002\u5bb9\u91cf\u304c\u78ba\u4fdd\u3055\u308c\u6b21\u7b2c\u3001\u30e1\u30fc\u30eb\u306f\u914d\u4fe1\u3055\u308c\u307e\u3059\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>452 Too many recipients received this hour (throttled)<\/li>\n<li>452. 4.3.1 Insufficient system storage (throttled)<\/li>\n<li>452 4.2.2 Over Quota<\/li>\n<\/ul>\n<p><strong>550<\/strong><br \/>\n\u914d\u4fe1\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c\u5229\u7528\u4e0d\u53ef\u3067\u3042\u308b\u304b\u3001\u53d7\u4fe1\u30b5\u30fc\u30d0\u306b\u62d2\u5426\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient\u2019s email address for typos or unnecessary spaces.<\/li>\n<li>550 Requested action not taken: mailbox unavailable<\/li>\n<li>550 5.1.1 &lt;address@aol.com&gt;: Recipient address rejected: aol.com<\/li>\n<\/ul>\n<p><strong>551<\/strong><br \/>\n\u5b9b\u5148\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c\u53d7\u4fe1\u30b5\u30fc\u30d0\u306b\u5b58\u5728\u3057\u307e\u305b\u3093\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>551 not our customer<\/li>\n<li>551 user does not exist<\/li>\n<\/ul>\n<p><strong>552<\/strong><br \/>\n\u5b9b\u5148\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u5bb9\u91cf\u304c\u4e0d\u8db3\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u53d7\u3051\u4ed8\u3051\u3089\u308c\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>552 5.2.2 This message is larger than the current system limit or the recipient\u2019s mailbox is full. Create a shorter message body or remove attachments and try sending it again.<\/li>\n<\/ul>\n<p><strong>553<\/strong><br \/>\n\u5b9b\u5148\u304c\u5b58\u5728\u3057\u306a\u3044\u305f\u3081\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u914d\u4fe1\u3055\u308c\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>553 sorry, that domain isn\u2019t in my list of allowed rcpthosts (#5.7.1)<\/li>\n<li>553 Invalid\/inactive user.<\/li>\n<\/ul>\n<p><strong>554<\/strong><br \/>\n\u914d\u4fe1\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u9001\u4fe1\u5074\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3082\u3057\u304f\u306f\u53d7\u4fe1\u30b5\u30fc\u30d0\u306b\u304a\u3051\u308b\u3001\u69d8\u3005\u306a\u554f\u984c\u304c\u8981\u56e0\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p style=\"margin-bottom:0;\">\u3000\u4f8b\uff09<\/p>\n<ul>\n<li>554 5.7.1 \u2013 ERROR: Mail refused<\/li>\n<li>554 5.7.1 [P4] Message blocked due to spam content in the message.<\/li>\n<\/ul>\n<p>SendGrid\u3067\u306f400\u756a\u53f0\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u8fd4\u3063\u305f\u5834\u5408\u306f\u9045\u5ef6\u3068\u898b\u306a\u3057\u3066\u6700\u957772\u6642\u9593\u518d\u9001\u3092\u8a66\u307f\u307e\u3059\u3002500\u756a\u53f0\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u8fd4\u3063\u305f\u5834\u5408\u306f\u6052\u4e45\u7684\u306a\u30a8\u30e9\u30fc\u3068\u5224\u65ad\u3057\u3066\u518d\u9001\u306f\u884c\u3044\u307e\u305b\u3093\u3002\u8a73\u3057\u3044\u6319\u52d5\u306b\u3064\u3044\u3066\u306f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u300c<a href=\"https:\/\/sendgrid.kke.co.jp\/docs\/API_Reference\/SMTP_API\/errors_and_troubleshooting.html\" rel=\"noopener\" target=\"_blank\">\u30a8\u30e9\u30fc\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>\u300d\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306f SMTP Server Response Codes: What Do They Mean? \u306e\u6284\u8a33\u3067\u3059\u3002 Twilio SendGrid\u3067\u306f\u3001\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb\u3084\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30e1\u30fc\u30eb\u3092\u6bce\u67081,000\u5104\u901a <a class=\"read-more\" href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=1308\">&#8230;\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":2,"featured_media":16306,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1308","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\/1308","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=1308"}],"version-history":[{"count":6,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1308\/revisions"}],"predecessor-version":[{"id":16897,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1308\/revisions\/16897"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/media\/16306"}],"wp:attachment":[{"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1308"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1308"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sendgrid.kke.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1308"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}