{"id":2170,"date":"2017-08-21T00:00:00","date_gmt":"2017-08-21T00:00:00","guid":{"rendered":"https:\/\/www.mailboxvalidator.com\/resources3\/articles\/why-are-my-emails-bouncing-back\/"},"modified":"2017-08-21T00:00:00","modified_gmt":"2017-08-21T00:00:00","password":"","slug":"why-are-my-emails-bouncing-back","status":"publish","type":"docs","link":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/","title":{"rendered":"Why are my emails bouncing back?"},"content":{"rendered":"
\n

\"Why-are-my-emails-bouncing-back\"<\/a><\/h2>\n

Email bounce is not always avoidable during an email campaign<\/h2>\n<\/div>\n

Anyone who has ever sent out a large amount of emails for newsletters or promotional purposes will know about bounced emails. Whenever you are dealing with a huge mailing list with thousands of email addresses, it is inevitable that you will receive a percentage of emails being bounced back whenever you perform large scale email sending.<\/p>\n

 <\/p>\n

\n

Common reasons for getting bounced emails<\/h2>\n<\/div>\n
\n
    \n
  1. Your email content contains the following:\n
      \n
    • Spam keywords like Buy now<\/em>, Free trial<\/em>, Viagra<\/em>, You have been selected<\/em> & Take action now<\/em><\/li>\n
    • Misleading URLs that tries to mimic real site URLs like http:\/\/youtube.com.[actual domain].com<\/em><\/li>\n
    • Phishing content where the email body pretends to be coming from a legitimate organization like a bank to steal user\u00e2\u20ac\u2122s login info<\/li>\n
    • Generic content like Dear customer<\/em> instead of addressing the recipient by name<\/li>\n
    • Using deceptive From names, reply-to email addresses or subject line<\/li>\n
    • No unsubscribe link<\/li>\n<\/ul>\n<\/li>\n
    • Keeps sending email even after recipient unsubscribed\n
        \n
      • Once a user has unsubscribed from your mailing list, it is not wise to keep sending them any emails.<\/li>\n<\/ul>\n<\/li>\n
      • Blacklisted IP or domain\n
          \n
        • If your email server reputation is bad because you have been flagged as a spammer, your IP or email domain may be blacklisted via spam lists like Spamhaus or Spamcop<\/li>\n<\/ul>\n<\/li>\n
        • Too many emails sent to the same ISP in a short period\n
            \n
          • Some ISPs employ greylisting where your email will be rejected for a period of time, after which you can safely send email again<\/li>\n<\/ul>\n<\/li>\n
          • Your mail server does not have DKIM or SPF\n
              \n
            • SPF (Sender Policy Framework) is a DNS entry which is like a whitelist of server IPs that are allowed to send email for your domain<\/li>\n
            • DKIM (DomainKeys Identified Mail) is a verification method (using a DNS entry with the DKIM key) to confirm that the email content is trustworthy & has not been tampered with since being sent out from the mail server<\/li>\n<\/ul>\n<\/li>\n
            • Invalid message id in the email header\n
                \n
              • Your email was sent using programs that did not generate a unique message id for that particular email<\/li>\n<\/ul>\n<\/li>\n
              • No PTR record for your email domain DNS entry\n
                  \n
                • The PTR record is for mapping an IP address to your domain so is a form of verification that the email did come from your domain hence the lack of a PTR record will leave the origin of your email in doubt<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                  Email bounce is not always avoidable during an email campaign Anyone who has ever sent out a large amount of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","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":"","ast-disable-related-posts":"","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":"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":"","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-4)","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-4)","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-4)","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":""},"doc_category":[69],"doc_tag":[],"class_list":["post-2170","docs","type-docs","status-publish","hentry","doc_category-technical-articles"],"year_month":"2026-05","word_count":402,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"mbv_editor","author_nicename":"mbv_editor","author_url":"https:\/\/www.mailboxvalidator.com\/resources\/author\/mbv_editor\/"},"doc_category_info":[{"term_name":"Technical Articles","term_url":"https:\/\/www.mailboxvalidator.com\/resources\/article-categories\/technical-articles\/"}],"doc_tag_info":[],"yoast_head":"\nWhy are my emails bouncing back? 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