{"id":19333,"date":"2010-12-07T13:12:25","date_gmt":"2010-12-07T18:12:25","guid":{"rendered":"https:\/\/www.pcmatic.com\/blog\/?p=19333"},"modified":"2010-12-07T13:12:25","modified_gmt":"2010-12-07T18:12:25","slug":"ask-leo-why-does-email-bounce","status":"publish","type":"post","link":"https:\/\/www.pcmatic.com\/blog\/ask-leo-why-does-email-bounce\/","title":{"rendered":"Ask Leo: Why Does Email Bounce?"},"content":{"rendered":"<p><script src=\"http:\/\/connect.facebook.net\/en_US\/all.js#xfbml=1\"><\/script><fb:like href=\"https:\/\/www.pcmatic.com\/blog\/2010\/12\/07\/ask-leo-why-does-email-bounce\/\" show_faces=\"false\" width=\"450\"><\/fb:like><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.pcmatic.com\/blog\/wp-content\/uploads\/20090929leonotenboomwp.jpg\" alt=\"askleo\" width=\"150\" height=\"150\" class=\"attachment wp-att-7652 alignleft\" \/><\/p>\n<p>By Leo Notenboom<\/p>\n<p><i>Sometimes my email bounces. Every so often I&#8217;ll send a message,<br \/>\nand a short time later I&#8217;ll receive a reply saying that the email failed to go<br \/>\nthrough. Why does it happen? And how do I fix it?<\/i><\/p>\n<p>Well, I&#8217;m afraid that there are <em>many<\/em> reasons mail could bounce. In<br \/>\nfact there are so many ways it could fail that sometimes I&#8217;m amazed that it<br \/>\nworks at all. But it definitely works most of the time, and one of the ways it<br \/>\nworks is that very bounce message you get.<\/p>\n<p>You see, there&#8217;s gold in that bounce message. It&#8217;s not only telling you that<br \/>\nyour message didn&#8217;t go through, but if you look a little closer, you&#8217;ll see<br \/>\nit&#8217;s trying to tell you why.<\/p>\n<p>Bounce messages can vary in format and in exact wording, depending on the<br \/>\nmail server that&#8217;s sending the message back to you. Different types of mail<br \/>\nservers use different terminology. Some are quite geeky and difficult to<br \/>\nunderstand. Others seem to take five paragraphs to tell you that you probably<br \/>\njust mistyped the email address you were sending to.<\/p>\n<p>What I&#8217;ll do here is list some of the most common messages, what they mean,<br \/>\nand what you can do. Remember, though &#8211; a message you get may not be worded<br \/>\n<em>exactly<\/em> as I list it here. You&#8217;ll have to look carefully at the bounce<br \/>\nmessage you receive and see which of these it&#8217;s most like.<\/p>\n<p><strong>Examining a Bounce<\/strong><\/p>\n<p>First, let&#8217;s look at a couple of bounce messages. Buried in the all the<br \/>\ngeekery, I&#8217;ve highlighted a couple of important things:<\/p>\n<blockquote>\n<pre> \n   ----- The following addresses had permanent fatal errors -----\n&lt;somewhere@example.com&gt;\n    (reason: 553 sorry, relaying denied from your location [10.10.10.10] (#5.7.1))\n \n   ----- Transcript of session follows -----\n... while talking to smtp.example.net.:\n&gt;&gt;&gt;&gt; DATA\n&lt;&lt;&lt; 553 sorry, relaying denied from your location [10.10.10.10] (#5.7.1)\n550 5.1.1 <strong>&lt;somewhere@example.com&gt;... User unknown<\/strong> \n&lt;&lt;&lt; 503 RCPT first (#5.5.1)\n<\/pre>\n<\/blockquote>\n<p>Here&#8217;s a bounce from another mail server which attempts to be more<br \/>\nfriendly:<\/p>\n<blockquote>\n<pre> \nHi. This is the qmail-send program at example.com.\nI'm afraid I wasn't able to deliver your message to the following addresses.\nThis is a permanent error; I've given up. Sorry it didn't work out.\n \n<strong>&lt;somewhere@example.com&gt;<\/strong>:\n10.10.10.10. does not like recipient.\nRemote host said: 550 <strong>MAILBOX NOT FOUND<\/strong> \nGiving up on 10.10.10.10.\n<\/pre>\n<\/blockquote>\n<p><a href=\"http:\/\/ask-leo.com\/why_does_email_bounce.html\" target=\"_blank\">Article continued here<\/a><\/p>\n<p>FaceBook URL:   <a href=\"http:\/\/ask-leo.com\/fb\" target=\"_blank\">Leo&#8217;s Facebook<\/a><\/p>\n<p>Twitter URL:     <a href=\"http:\/\/twitter.com\/askleo\" target=\"_blank\">http:\/\/twitter.com\/askleo<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"http:\/\/techtalk.pcpitstop.com\/wp-content\/uploads\/20090929leonotenboomwp.jpg\" alt=\"askleo\" class=\"attachment wp-att-7167 alignleft\" \/><\/p>\n<p>By Leo Notenboom<\/p>\n<p>Email can bounce for many reasons. I&#8217;ll look at several of the most common mail bounce messages, and try to interpret what they really mean.<\/p>\n","protected":false},"author":19,"featured_media":66012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","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-opacity":"","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-opacity":"","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-opacity":"","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-opacity":"","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-opacity":"","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-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[49],"tags":[46,1901,64,1902,216,4875,1219,1164,1903,1904,1806,1905],"class_list":["post-19333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-leo-notenboom","tag-ask-leo","tag-bounce-message","tag-com","tag-exact-wording","tag-facebook","tag-leo-notenboom","tag-location","tag-mail","tag-mail-server","tag-mail-servers","tag-message","tag-rcpt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ask Leo: Why Does Email Bounce?<\/title>\n<meta name=\"description\" content=\"By Leo Notenboom Email can bounce for many reasons. 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