{"id":71642,"date":"2023-07-10T20:45:31","date_gmt":"2023-07-10T20:45:31","guid":{"rendered":"https:\/\/mailrelay.com\/glossary\/soft-bounce\/"},"modified":"2026-10-02T15:24:31","modified_gmt":"2026-10-02T15:24:31","slug":"soft-bounce","status":"publish","type":"glossary","link":"https:\/\/mailrelay.com\/en\/glossary\/soft-bounce\/","title":{"rendered":"Soft bounce"},"content":{"rendered":"<p>A soft bounce indicates a delivery issue, where the email could not be delivered to the recipient&#8217;s mail server due to a temporary (non-permanent) problem.<\/p>\n<p>Soft bounces are caused by a temporary problem, so once the problem has been resolved, the recipient will be able to receive the email normally and quickly.<\/p>\n<p>Each <a title=\"Email marketing campaigns\" href=\"https:\/\/mailrelay.com\/en\/\">email marketing provider<\/a> handles soft bounces in its own way, but always based on the SMTP response from the destination server. It is common that if an email address keeps returning a soft bounce status after several email marketing campaigns in a row, it ends up being considered a hard bounce (a definitive bounce).<\/p>\n<h2>1. Hard bounce and soft bounce<\/h2>\n<p><a href=\"https:\/\/mailrelay.com\/en\/glossary\/hard-bounce\/\" target=\"_blank\" rel=\"noopener\">Hard bounces<\/a> are bounces that occur when an email can&#8217;t be delivered due to a definitive and permanent problem with the email address it was sent to. You can&#8217;t send to these addresses anymore.<\/p>\n<p>Soft bounces, on the other hand, occur when an email can&#8217;t be delivered due to a temporary, non-permanent problem with the email address it was sent to. You can still send to these addresses, temporarily.<\/p>\n<h2>2. Reasons for a soft bounce<\/h2>\n<p>Although the most common cause of a soft bounce is that the <a href=\"https:\/\/mailrelay.com\/en\/glossary\/recipient\/\" target=\"_blank\" rel=\"noopener\">recipient&#8217;s<\/a> mailbox is full, there are many different reasons why our email may end up as a soft bounce. Some of the most common reasons for soft bounces are:<\/p>\n<ul>\n<li>The recipient&#8217;s mailbox is full, it has exceeded its allotted space quota.<\/li>\n<li>The destination mailbox is inactive or doesn&#8217;t exist on the server.<\/li>\n<li>The recipient&#8217;s mailbox is not configured correctly.<\/li>\n<li>The domain name doesn&#8217;t exist (the recipient&#8217;s domain).<\/li>\n<li>The recipient&#8217;s mail server is down\/offline.<\/li>\n<li>The recipient&#8217;s email server has received too many emails for a period of time (time set by the server administrator).<\/li>\n<li>The email message is too large (due to sending <a href=\"https:\/\/mailrelay.com\/en\/glossary\/attachment\/\" target=\"_blank\" rel=\"noopener\">attachments<\/a>).<\/li>\n<li>The email message doesn&#8217;t comply with the anti-spam policies of the destination server.<\/li>\n<li>The email message doesn&#8217;t meet the destination server&#8217;s <a href=\"https:\/\/mailrelay.com\/en\/glossary\/dmarc\/\" target=\"_blank\" rel=\"noopener\">DMARC<\/a> authentication requirements.<\/li>\n<li>The email message was blocked because of its content (destination server&#8217;s policies).<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Related entries<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/crm-customer-relationship-management\/\">CRM (Customer Relationship Management)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/cro-conversion-rate-optimization\/\">CRO (Conversion Rate Optimization)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/cross-channel-marketing\/\">Cross channel marketing<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/cross-selling\/\">Cross selling<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/css-cascading-style-sheets\/\">CSS (Cascading Style Sheets)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/ctor\/\">CTOR<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/ctr-click-through-rate\/\">CTR (Click Through Rate)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/mailrelay.com\/en\/glossary\/email-body\/\">Email body<\/a><\/li>\n<\/ul>\n","protected":false},"template":"","class_list":["post-71642","glossary","type-glossary","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - 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Soft bounces are caused by a temporary problem, so once the problem has been resolved, the recipient will be able to receive the email normally and quickly. Each email marketing&hellip;","_links":{"self":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/glossary\/71642","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":6,"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/glossary\/71642\/revisions"}],"predecessor-version":[{"id":98346,"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/glossary\/71642\/revisions\/98346"}],"wp:attachment":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/media?parent=71642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}