{"id":5759,"date":"2022-01-24T07:56:43","date_gmt":"2022-01-24T13:56:43","guid":{"rendered":"https:\/\/www.knownhost.com\/kb\/?p=5759"},"modified":"2022-08-23T09:37:33","modified_gmt":"2022-08-23T14:37:33","slug":"smtp-error-503","status":"publish","type":"post","link":"https:\/\/www.knownhost.com\/kb\/smtp-error-503\/","title":{"rendered":"SMTP Error 503"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #212121;color:#212121\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #212121;color:#212121\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.knownhost.com\/kb\/smtp-error-503\/#what_does_this_mean\" >What does this mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.knownhost.com\/kb\/smtp-error-503\/#how_to_fix_smtp_error_503\" >How to fix SMTP Error 503?<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><strong>Description<\/strong>: Bad sequence of commands.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what_does_this_mean\"><\/span>What does this mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>This is also very similar to SMTP Error # 501. The small difference in this, is due to the parameters or options being out of order from what the mail server expected. This is commonly seen when not authenticating the email account.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"how_to_fix_smtp_error_503\"><\/span>How to fix SMTP Error 503?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Check to make sure that the email account is authenticating properly (if required&nbsp;<em>which it should!<\/em>.) If properly authenticating, ensure all MTA configurations are set properly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Description: Bad sequence of commands. What does this mean? This is also very similar to SMTP Error # 501. The small difference in this, is due to the parameters or options being out of order from what the mail server expected. This is commonly seen when not authenticating the email account. How to fix SMTP [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[97],"tags":[570,380,291],"class_list":["post-5759","post","type-post","status-publish","format-standard","hentry","category-other","tag-570","tag-error","tag-smtp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SMTP Error 503 - KnownHost<\/title>\n<meta name=\"description\" content=\"KnownHost self-hosted email guide to help you troubleshoot and fix SMTP Error 503 on your premium KnownHost server.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.knownhost.com\/kb\/smtp-error-503\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SMTP Error 503 - 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