{"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":"2026-07-30T08:50:19","modified_gmt":"2026-07-30T08:50:19","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><\/figure>\n\n\n\n

Why Email Bounces Are Inevitable in Large Campaigns<\/h2>\n\n\n\n

Anyone who has ever managed large newsletter campaigns understands the headache of bounced emails. If your mailing list contains thousands of addresses, a small percentage of bounces is simply inevitable. Consequently, every marketer must learn to manage these delivery failures.<\/p>\n\n\n\n

Technical and Authentication Failures<\/h2>\n\n\n\n

Modern email providers enforce incredibly strict security protocols. Therefore, missing authentication records will quickly trigger high bounce rates.<\/p>\n\n\n\n

    \n
  • Missing SPF or DKIM:<\/strong> An SPF record whitelists the specific server IPs allowed to send your mail. Meanwhile, a DKIM signature confirms your email content was not tampered with during delivery.<\/li>\n\n\n\n
  • No PTR record:<\/strong> This DNS entry maps your IP address back to your domain name. Without a PTR record, ISPs will deeply doubt the true origin of your message.<\/li>\n\n\n\n
  • Invalid message headers:<\/strong> Using basic software might result in missing or generic message IDs. Thus, spam filters will view your emails as highly suspicious.<\/li>\n<\/ul>\n\n\n\n

    Deliverability Limits and IP Reputation<\/h2>\n\n\n\n

    Your overall sender reputation heavily determines whether your messages actually reach the inbox.<\/p>\n\n\n\n

      \n
    • Blacklisted IP or domain:<\/strong> Your server may end up listed on global databases like Spamhaus. Consequently, your emails will be blocked instantly.<\/li>\n\n\n\n
    • Volume spikes and greylisting:<\/strong> Sending too many messages simultaneously triggers aggressive ISP rate limits. As a result, the receiving server will temporarily reject your emails.<\/li>\n\n\n\n
    • Ignoring unsubscribe requests:<\/strong> You must stop messaging users immediately after they opt out. Failing to do so will destroy your brand reputation.<\/li>\n<\/ul>\n\n\n\n

      Content and Layout Red Flags<\/h2>\n\n\n\n

      Spam filters actively scan the text and structure of your campaigns before allowing them through.<\/p>\n\n\n\n

        \n
      • Using spam keywords:<\/strong> Avoid high-pressure sales phrases like buy now<\/em> or free trial<\/em>.<\/li>\n\n\n\n
      • Including misleading URLs:<\/strong> Filters flag links that mimic real brands to trick users.<\/li>\n\n\n\n
      • Sounding like a phishing scam:<\/strong> Never copy the exact formatting of sensitive organizations like banks.<\/li>\n\n\n\n
      • Relying on generic greetings:<\/strong> Do not use lazy phrasing like dear customer<\/em>. Instead, always address your recipient by their actual name.<\/li>\n\n\n\n
      • Omitting the unsubscribe link:<\/strong> Every marketing email must include a clear way to opt out.<\/li>\n<\/ul>\n\n\n\n

        Conclusion<\/h2>\n\n\n\n

        You can never eliminate bounces entirely from your email campaigns. However, implementing robust authentication and keeping lists clean will dramatically improve your metrics. Focus heavily on these technical foundations to maximize your inbox delivery.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Why Email Bounces Are Inevitable in Large Campaigns Anyone who has ever managed large newsletter campaigns understands the headache 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":"2026-08","word_count":373,"total_views":"11","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? -<\/title>\n<meta name=\"description\" content=\"Why are my emails bouncing back?\" \/>\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.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why are my emails bouncing back? -\" \/>\n<meta property=\"og:description\" content=\"Why are my emails bouncing back?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mailboxvalidator\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-30T08:50:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img11.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@MailBoxV\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/\",\"url\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/\",\"name\":\"Why are my emails bouncing back? -\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/wp-content\\\/uploads\\\/2020\\\/01\\\/mbv_articles_img11-600x300.png\",\"datePublished\":\"2017-08-21T00:00:00+00:00\",\"dateModified\":\"2026-07-30T08:50:19+00:00\",\"description\":\"Why are my emails bouncing back?\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/wp-content\\\/uploads\\\/2020\\\/01\\\/mbv_articles_img11.png\",\"contentUrl\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/wp-content\\\/uploads\\\/2020\\\/01\\\/mbv_articles_img11.png\",\"width\":1200,\"height\":600,\"caption\":\"Why-are-my-emails-bouncing-back\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/why-are-my-emails-bouncing-back\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Knowledge Base\",\"item\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/articles\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Why are my emails bouncing back?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/#website\",\"url\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/\",\"name\":\"MailboxValidator Articles\",\"description\":\"MailboxValidator Articles\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/#organization\",\"name\":\"MailboxValidator\",\"url\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/wp-content\\\/uploads\\\/2017\\\/11\\\/cropped-mailboxvalidator-fb-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/wp-content\\\/uploads\\\/2017\\\/11\\\/cropped-mailboxvalidator-fb-logo.png\",\"width\":1199,\"height\":399,\"caption\":\"MailboxValidator\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mailboxvalidator.com\\\/resources\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/mailboxvalidator\",\"https:\\\/\\\/x.com\\\/MailBoxV\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/mailboxvalidator\\\/\",\"https:\\\/\\\/www.pinterest.com\\\/mailboxvalidator\\\/\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCesIP5V7nXRXthaqdjjfCFg\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Why are my emails bouncing back? -","description":"Why are my emails bouncing back?","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/","og_locale":"en_US","og_type":"article","og_title":"Why are my emails bouncing back? -","og_description":"Why are my emails bouncing back?","og_url":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/","article_publisher":"https:\/\/www.facebook.com\/mailboxvalidator","article_modified_time":"2026-07-30T08:50:19+00:00","og_image":[{"width":1200,"height":600,"url":"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img11.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_site":"@MailBoxV","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/","url":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/","name":"Why are my emails bouncing back? -","isPartOf":{"@id":"https:\/\/www.mailboxvalidator.com\/resources\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/#primaryimage"},"image":{"@id":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/#primaryimage"},"thumbnailUrl":"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img11-600x300.png","datePublished":"2017-08-21T00:00:00+00:00","dateModified":"2026-07-30T08:50:19+00:00","description":"Why are my emails bouncing back?","breadcrumb":{"@id":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/#primaryimage","url":"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img11.png","contentUrl":"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img11.png","width":1200,"height":600,"caption":"Why-are-my-emails-bouncing-back"},{"@type":"BreadcrumbList","@id":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/why-are-my-emails-bouncing-back\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.mailboxvalidator.com\/resources\/"},{"@type":"ListItem","position":2,"name":"Knowledge Base","item":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/"},{"@type":"ListItem","position":3,"name":"Why are my emails bouncing back?"}]},{"@type":"WebSite","@id":"https:\/\/www.mailboxvalidator.com\/resources\/#website","url":"https:\/\/www.mailboxvalidator.com\/resources\/","name":"MailboxValidator Articles","description":"MailboxValidator Articles","publisher":{"@id":"https:\/\/www.mailboxvalidator.com\/resources\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.mailboxvalidator.com\/resources\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.mailboxvalidator.com\/resources\/#organization","name":"MailboxValidator","url":"https:\/\/www.mailboxvalidator.com\/resources\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.mailboxvalidator.com\/resources\/#\/schema\/logo\/image\/","url":"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2017\/11\/cropped-mailboxvalidator-fb-logo.png","contentUrl":"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2017\/11\/cropped-mailboxvalidator-fb-logo.png","width":1199,"height":399,"caption":"MailboxValidator"},"image":{"@id":"https:\/\/www.mailboxvalidator.com\/resources\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/mailboxvalidator","https:\/\/x.com\/MailBoxV","https:\/\/www.linkedin.com\/company\/mailboxvalidator\/","https:\/\/www.pinterest.com\/mailboxvalidator\/","https:\/\/www.youtube.com\/channel\/UCesIP5V7nXRXthaqdjjfCFg"]}]}},"_links":{"self":[{"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/docs\/2170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/comments?post=2170"}],"version-history":[{"count":2,"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/docs\/2170\/revisions"}],"predecessor-version":[{"id":2623,"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/docs\/2170\/revisions\/2623"}],"wp:attachment":[{"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/media?parent=2170"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/doc_category?post=2170"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.mailboxvalidator.com\/resources\/wp-json\/wp\/v2\/doc_tag?post=2170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}