{"id":19042,"date":"2020-11-20T11:07:38","date_gmt":"2020-11-20T03:07:38","guid":{"rendered":"https:\/\/web.mwwsb.com.my\/pjci\/?post_type=kb&#038;p=19042"},"modified":"2022-09-08T20:13:43","modified_gmt":"2022-09-08T12:13:43","slug":"undeliverable-message-and-451-greylisted","status":"publish","type":"kb","link":"https:\/\/www.casbay.com\/guide\/kb\/undeliverable-message-and-451-greylisted","title":{"rendered":"Undeliverable Message"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"19042\" class=\"elementor elementor-19042\" data-elementor-post-type=\"kb\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f4ed913 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f4ed913\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fb6ff4a\" data-id=\"fb6ff4a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5abcc71 elementor-widget elementor-widget-heading\" data-id=\"5abcc71\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Overview\/Problem of Undeliverable Message<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9a890d elementor-widget elementor-widget-text-editor\" data-id=\"c9a890d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>This article discusses how you can send an email to someone with the same domain name to solve the message that the 451 Greylist system administrator receives. This status will be shown in \u2018451 Greylisted, please try again in XXX seconds\u2019.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd1bb16 elementor-widget elementor-widget-image\" data-id=\"bd1bb16\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/casbay.com\/guide\/wp-content\/uploads\/2021\/02\/BLOG-Greylisting-SS1.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f53d92 elementor-widget elementor-widget-heading\" data-id=\"4f53d92\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Greylisting?\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c68a14a elementor-widget elementor-widget-text-editor\" data-id=\"c68a14a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Greylisting is one way of stopping \/ reducing spam. Mail servers with the option to delay emails temporarily until posts verify that the message is genuine. In the previous days, most spammers once sent a spam message to a user, so the message wasn\u2019t resentful. However, the greylisting has altered slightly today, and is thus still helpful today with other anti-spam techniques.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d923ff elementor-widget elementor-widget-heading\" data-id=\"4d923ff\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How to Fix \u2013 Adjusting your SMTP Authentication<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18f07fd elementor-widget elementor-widget-text-editor\" data-id=\"18f07fd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Your customers must use <a href=\"https:\/\/techterms.com\/definition\/smtp#:~:text=Stands%20for%20%22Simple%20Mail%20Transfer,the%20correct%20receiving%20mail%20server.\" rel=\"noopener\">SMTP<\/a> authentication in order to fix the greylized error for the mail customers. This is a relatively fast solution in Microsoft Outlook 2003, 2007 and 2010.<\/span><\/p><p><span style=\"font-weight: 400;\">Your mailbox account configurations need to be adjusted:<\/span><\/p><ul><li><b>Open Control Panel<\/b><\/li><\/ul><ul><li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Click <\/span><b>Mail<\/b><span style=\"font-weight: 400;\"> (or Mail x32 in my example&gt;Click Email Accounts&gt;Click <\/span><b>Change<\/b><span style=\"font-weight: 400;\">&gt;Click <\/span><b>More Settings<\/b><\/li><li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Select the <\/span><b>Outgoing Server tab<\/b><\/li><li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Check \u201c<\/span><b>My outgoing server (SMTP) requires authentication.<\/b><span style=\"font-weight: 400;\">\u201d<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">If you have specific credentials you need to use, you can change your settings to \u201cLog on using\u201d<\/span><\/p><p><span style=\"font-weight: 400;\">Send a test email now to someone with the identical domain name!<\/span><\/p><p><span style=\"font-weight: 400;\">Done!<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-14f53a2 elementor-widget elementor-widget-text-editor\" data-id=\"14f53a2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Read another article: <em><a href=\"https:\/\/www.casbay.com\/guide\/kb\/transfer-move-email-contents-imap\">Transfer Move Mail Content<\/a><\/em><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Overview\/Problem of Undeliverable Message This article discusses how you can send an email to someone with the same domain name to solve the message that the 451 Greylist system administrator receives. This status will be shown in \u2018451 Greylisted, please try again in XXX seconds\u2019. What is Greylisting? Greylisting is one way of stopping \/ [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"kbtopic":[49],"kbtag":[106],"mkb_version":[],"_links":{"self":[{"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/kb\/19042"}],"collection":[{"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/kb"}],"about":[{"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/types\/kb"}],"author":[{"embeddable":true,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/comments?post=19042"}],"version-history":[{"count":14,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/kb\/19042\/revisions"}],"predecessor-version":[{"id":37149,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/kb\/19042\/revisions\/37149"}],"wp:attachment":[{"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/media?parent=19042"}],"wp:term":[{"taxonomy":"kbtopic","embeddable":true,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/kbtopic?post=19042"},{"taxonomy":"kbtag","embeddable":true,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/kbtag?post=19042"},{"taxonomy":"mkb_version","embeddable":true,"href":"https:\/\/www.casbay.com\/guide\/wp-json\/wp\/v2\/mkb_version?post=19042"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}