{"id":5227,"date":"2026-03-09T12:18:22","date_gmt":"2026-03-09T12:18:22","guid":{"rendered":"https:\/\/emailwarmup.com\/blog\/?p=5227"},"modified":"2026-03-09T12:18:23","modified_gmt":"2026-03-09T12:18:23","slug":"how-to-fix-550-5-4-5-gmail-daily-sending-limit-exceeded","status":"publish","type":"post","link":"https:\/\/emailwarmup.com\/blog\/email-errors\/how-to-fix-550-5-4-5-gmail-daily-sending-limit-exceeded\/","title":{"rendered":"How To Fix 550 5.4.5 | Gmail Daily Sending Limit Exceeded"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"3028\" height=\"1927\" src=\"https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg\" alt=\"550 5.4.5\" class=\"wp-image-5228\"\/><\/figure>\n\n\n\n<p>The 550 5.4.5 error means you&#8217;ve exceeded Gmail&#8217;s daily sending quota \u2014 Gmail caps outgoing messages to prevent spam abuse.&nbsp;<\/p>\n\n\n\n<p>Fix it by waiting 24 hours for the limit to reset. To prevent recurrence, reduce daily sending volume, avoid excessive recipients per message, and consider Google Workspace or SMTP relay for higher limits.<\/p>\n\n\n\n<p>Unlike authentication errors (which require configuration changes), 550 5.4.5 is a <em>rate limit<\/em> \u2014 the only immediate fix is waiting.&nbsp;<\/p>\n\n\n\n<p>However, understanding Gmail&#8217;s limits and planning your sending accordingly prevents future disruptions. Repeatedly hitting limits may trigger additional restrictions (Gmail watches for patterns).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quick skim \u2014 550 5.4.5 error overview<\/h2>\n\n\n\n<p>The 550 5.4.5 error represents a temporary rate limit rather than a configuration problem.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Attribute<\/td><td>Details<\/td><\/tr><tr><td>Error code<\/td><td>550 5.4.5<\/td><\/tr><tr><td>Category<\/td><td>Rate limiting<\/td><\/tr><tr><td>Meaning<\/td><td>Daily sending quota exhausted<\/td><\/tr><tr><td>Severity<\/td><td>Temporary (resets in 24 hours)<\/td><\/tr><tr><td>Common causes<\/td><td>Bulk sends, large CC\/BCC lists, automation<\/td><\/tr><tr><td>Fix approach<\/td><td>Wait \u2192 reduce volume \u2192 use appropriate tools<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What does daily quota exceeded mean?<\/h2>\n\n\n\n<p>Gmail enforces per-account sending limits that reset every 24 hours. Exceeding the limit blocks all outgoing mail until the window resets.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gmail sending limits<\/h3>\n\n\n\n<p>Here are sending limits for Gmail:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Account Type<\/td><td>Daily Limit<\/td><td>Notes<\/td><\/tr><tr><td>Free Gmail<\/td><td>500 recipients\/day<\/td><td>Includes all To, CC, BCC<\/td><\/tr><tr><td>Google Workspace (paid)<\/td><td>2,000 recipients\/day<\/td><td>Per user account<\/td><\/tr><tr><td>Gmail SMTP relay<\/td><td>10,000+ recipients\/day<\/td><td>Requires Workspace, separate configuration<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">What counts as recipients<\/h3>\n\n\n\n<p>Each unique recipient address counts against your limit:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>One email to 100 BCC recipients = 100 toward the limit<\/li>\n\n\n\n<li>100 individual emails = 100 toward limit<\/li>\n\n\n\n<li>Forwarding also counts<\/li>\n<\/ul>\n\n\n\n<p>Sending one email to yourself with 500 BCC recipients exhausts a free account&#8217;s entire daily quota.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Rolling 24-hour window<\/h3>\n\n\n\n<p>Gmail&#8217;s limit isn&#8217;t midnight-to-midnight \u2014 it&#8217;s a rolling 24-hour window from each send. Sending 400 emails at 3 pm means those 400 &#8220;expire&#8221; at 3 pm the next day.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why does the 550 5.4.5 error occur?<\/h2>\n\n\n\n<p>Hitting the limit usually indicates one of several patterns.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bulk email campaigns<\/h3>\n\n\n\n<p>Marketing sends, announcements, or newsletters sent directly through Gmail (rather than proper email marketing tools) quickly exhaust quotas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Large distribution lists<\/h3>\n\n\n\n<p>Single messages to many recipients consume the limit faster than many individual messages. An all-company announcement with 500 recipients hits the cap in one send.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Automation without throttling<\/h3>\n\n\n\n<p>Scripts or integrations sending automated emails (notifications, alerts, reports) without rate limiting accumulate sends faster than anticipated.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Compromised account<\/h3>\n\n\n\n<p>If you&#8217;re hitting limits without knowing why, your account may be compromised \u2014 spammers sending through your credentials.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">New account restrictions<\/h3>\n\n\n\n<p>New Gmail accounts have <em>lower<\/em> limits initially (as low as 50-100\/day). Google increases limits as the account establishes legitimate sending patterns.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How do you fix 550 5.4.5?<\/h2>\n\n\n\n<p>The immediate fix is simple (wait), but prevention requires workflow changes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wait 24 hours<\/h3>\n\n\n\n<p>Gmail&#8217;s limit resets on a rolling basis:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stop all sending immediately<\/li>\n\n\n\n<li>Wait 24 hours from your most recent send<\/li>\n\n\n\n<li>Resume gradually<\/li>\n<\/ul>\n\n\n\n<p>Attempting to force sends during the block extends the restriction.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Check for compromise<\/h3>\n\n\n\n<p>If unexpected, verify account security:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Review recent sent mail (look for messages you didn&#8217;t send)<\/li>\n\n\n\n<li>Check connected apps (Settings \u2192 Security \u2192 Third-party apps)<\/li>\n\n\n\n<li>Change password<\/li>\n\n\n\n<li>Enable two-factor authentication<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Reduce sending volume<\/h3>\n\n\n\n<p>For legitimate high-volume needs, restructure your approach:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spread is sent across multiple days<\/li>\n\n\n\n<li>Prioritize critical messages<\/li>\n\n\n\n<li>Use scheduling to distribute sends evenly<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Use appropriate tools<\/h3>\n\n\n\n<p>Gmail isn&#8217;t designed for bulk sending. Better alternatives:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Need<\/td><td>Solution<\/td><\/tr><tr><td>Marketing emails<\/td><td>Mailchimp, SendGrid, Klaviyo, etc.<\/td><\/tr><tr><td>Transactional emails<\/td><td>SendGrid, Mailgun, Amazon SES<\/td><\/tr><tr><td>Large distribution<\/td><td>Google Groups (single recipient counts as one)<\/td><\/tr><tr><td>High-volume business<\/td><td>Google Workspace SMTP Relay<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Configure Google Groups<\/h3>\n\n\n\n<p>For recurring distribution needs:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Create a Google Group containing your recipients<\/li>\n\n\n\n<li>Send to the group address<\/li>\n\n\n\n<li>One group = one recipient toward your quota<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Use SMTP Relay (Workspace)<\/h3>\n\n\n\n<p>Google Workspace customers can configure the SMTP relay service:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Supports 10,000+ messages daily<\/li>\n\n\n\n<li>Requires proper configuration in Admin Console<\/li>\n\n\n\n<li>Still subject to recipient rate limits<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How do you prevent this error?<\/h2>\n\n\n\n<p>Planning and appropriate tooling prevent quota exhaustion.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Track sending volume<\/h3>\n\n\n\n<p>Monitor daily sends against your limit:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Enable Gmail&#8217;s &#8220;Sent&#8221; folder search by date<\/li>\n\n\n\n<li>Track automated sends separately<\/li>\n\n\n\n<li>Budget for unexpected needs<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Throttle automation<\/h3>\n\n\n\n<p>Configure sending delays in automated systems:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Space messages throughout the day<\/li>\n\n\n\n<li>Limit messages per hour<\/li>\n\n\n\n<li>Queue rather than burst<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Segment audiences<\/h3>\n\n\n\n<p>For large sends, split across:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Multiple accounts (if legitimate)<\/li>\n\n\n\n<li>Multiple days<\/li>\n\n\n\n<li>Different sending infrastructure (ESP for bulk)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Warm new accounts<\/h3>\n\n\n\n<p>New accounts have lower limits. Build sending history gradually:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Start with 10-20 messages daily<\/li>\n\n\n\n<li>Increase over 2-4 weeks<\/li>\n\n\n\n<li>Establish legitimate patterns before bulk needs<\/li>\n<\/ul>\n\n\n\n\n<!-- EmailWarmup \u2014 Email Errors Campaign CTA Section -->\n<section id=\"ew-email-errors-consult\" aria-label=\"Help fixing email errors\">\n  <style>\n    \/* Scoped, theme-safe resets *\/\n    #ew-email-errors-consult, #ew-email-errors-consult *{\n      box-sizing:border-box;\n      -webkit-hyphens:none!important; -ms-hyphens:none!important; hyphens:none!important;\n      word-break:normal!important; overflow-wrap:anywhere;\n      font-family:system-ui,-apple-system,Segoe UI,Inter,Roboto,Arial,sans-serif!important;\n      color:#0f1115;\n    }\n\n    \/* Section wrapper *\/\n    #ew-email-errors-consult{\n      --radius:16px; --gap:14px;\n      --ink:#0f1115; --muted:#475569;\n      --border:#e5e7eb; --surface:#ffffff;\n\n      --tile1:#e9f0ff;\n      --tile2:#ecffd7;\n      --tile3:#efeaff;\n      --tile4:#ffe9f1;\n\n      background:\n        radial-gradient(1400px 600px at 10% -10%, #eef2ff 0%, transparent 60%),\n        radial-gradient(1400px 600px at 110% 110%, #fff7ed 0%, transparent 60%),\n        var(--surface);\n      border:1px solid var(--border);\n      border-radius:var(--radius);\n      padding:18px;\n      margin:24px auto;\n      max-width:980px;\n      box-shadow:0 8px 22px rgba(15,17,21,.06);\n    }\n\n    \/* Intro *\/\n    #ew-email-errors-consult .intro{\n      text-align:center;\n      max-width:760px;\n      margin:0 auto 16px;\n    }\n    #ew-email-errors-consult .eyebrow{\n      display:inline-block;\n      margin:0 0 8px;\n      padding:6px 10px;\n      border-radius:999px;\n      background:#eff6ff;\n      border:1px solid #dbeafe;\n      font-size:12px;\n      font-weight:800;\n      color:#1d4ed8;\n      letter-spacing:.02em;\n      text-transform:uppercase;\n    }\n    #ew-email-errors-consult .title{\n      margin:0 0 8px;\n      font-size:28px;\n      line-height:1.15;\n      letter-spacing:-.02em;\n      font-weight:900;\n      color:var(--ink);\n    }\n    #ew-email-errors-consult .subtitle{\n      margin:0;\n      font-size:15px;\n      line-height:1.6;\n      color:var(--muted);\n    }\n    #ew-email-errors-consult .subtitle a{\n      color:#2563eb;\n      text-decoration:none;\n      font-weight:700;\n    }\n    #ew-email-errors-consult .subtitle a:hover{ text-decoration:underline; 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}\n    #ew-email-errors-consult .btn:active{ transform:translateY(1px); }\n\n    @media (max-width:640px){\n      #ew-email-errors-consult .title{ font-size:24px; }\n    }\n  <\/style>\n\n  <div class=\"intro\">\n    <div class=\"eyebrow\">Need help fixing an email error?<\/div>\n    <h2 class=\"title\">Still stuck after trying the fix?<\/h2>\n    <p class=\"subtitle\">\n      Some email errors are easy to clear. Others point to deeper deliverability issues involving authentication, sender reputation, blacklisting, routing, or mailbox provider policy. If you would rather have an expert review it, speak with an\n      <a href=\"https:\/\/emailwarmup.com\/email-deliverability-consultant\">email delieverability consultant<\/a>\n      for free and we can help diagnose the issue and fix it on your behalf.\n    <\/p>\n  <\/div>\n\n  <div class=\"tiles\" role=\"list\">\n    <article class=\"tile t1\" role=\"listitem\">\n      <div class=\"icon\" aria-hidden=\"true\">\n        <svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\">\n          <path d=\"M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z\"><\/path>\n        <\/svg>\n      <\/div>\n      <div>\n        <span class=\"h3like\">Root cause analysis<\/span>\n        <p>We look beyond the error message itself to find what is actually breaking delivery, trust, or inbox placement.<\/p>\n      <\/div>\n    <\/article>\n\n    <article class=\"tile t2\" role=\"listitem\">\n      <div class=\"icon\" aria-hidden=\"true\">\n        <svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\">\n          <path d=\"M20 6L9 17l-5-5\"><\/path>\n        <\/svg>\n      <\/div>\n      <div>\n        <span class=\"h3like\">Technical fixes handled for you<\/span>\n        <p>From SPF, DKIM, and DMARC to blacklist cleanup, DNS alignment, and sending setup, we can guide or implement the fix.<\/p>\n      <\/div>\n    <\/article>\n\n    <article class=\"tile t3\" role=\"listitem\">\n      <div class=\"icon\" aria-hidden=\"true\">\n        <svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\">\n          <path d=\"M12 20V10\"><\/path>\n          <path d=\"M18 20V4\"><\/path>\n          <path d=\"M6 20v-4\"><\/path>\n        <\/svg>\n      <\/div>\n      <div>\n        <span class=\"h3like\">Deliverability-first review<\/span>\n        <p>We assess whether the error is part of a bigger pattern hurting opens, replies, and overall campaign performance.<\/p>\n      <\/div>\n    <\/article>\n\n    <article class=\"tile t4\" role=\"listitem\">\n      <div class=\"icon\" aria-hidden=\"true\">\n        <svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\">\n          <path d=\"M12 12c2.8 0 5-2.2 5-5s-2.2-5-5-5-5 2.2-5 5 2.2 5 5 5z\"><\/path>\n          <path d=\"M2 22c1.5-4 5.5-6 10-6s8.5 2 10 6\"><\/path>\n        <\/svg>\n      <\/div>\n      <div>\n        <span class=\"h3like\">Free expert consultation<\/span>\n        <p>Talk to a real deliverability expert, get honest guidance, and see the next best step without pressure or upsells.<\/p>\n      <\/div>\n    <\/article>\n  <\/div>\n\n  <div class=\"bottom\">\n    <p>\n      <strong>When should you book a consultation?<\/strong> If the error keeps coming back, affects multiple mailboxes or domains, started after an ESP or DNS change, or is tied to spam placement, low inboxing, high bounce rates, or authentication failures, it is usually faster to get an expert involved early.\n    <\/p>\n  <\/div>\n\n  <div class=\"cta\">\n    <a class=\"btn\" href=\"https:\/\/emailwarmup.com\/email-deliverability-consultant\" target=\"_blank\" rel=\"noopener\">\n      Talk to a deliverability expert for free\n      <svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" aria-hidden=\"true\">\n        <path d=\"M5 12h14\"><\/path>\n        <path d=\"M12 5l7 7-7 7\"><\/path>\n      <\/svg>\n    <\/a>\n  <\/div>\n<\/section>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n\n<p>Here are some commonly asked questions about this error:<\/p>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1773058529101\"><strong class=\"schema-faq-question\">How long until the limit resets?<\/strong> <p class=\"schema-faq-answer\">Gmail uses a rolling 24-hour window. The limit resets 24 hours after each message is sent \u2014 not at midnight. If you sent your limit&#8217;s worth at 2 pm, you&#8217;ll regain capacity gradually starting at 2 pm the next day.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773058536841\"><strong class=\"schema-faq-question\">Does receiving email count toward the limit?<\/strong> <p class=\"schema-faq-answer\">No. The 550 5.4.5 limit applies only to <em>outgoing<\/em> messages. You can receive unlimited email (subject to storage quotas).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773058543385\"><strong class=\"schema-faq-question\">Can I get my limit increased?<\/strong> <p class=\"schema-faq-answer\">For free Gmail, no. For Google Workspace, upgrading your plan or configuring SMTP relay provides higher limits. Contact Google Workspace support for enterprise needs exceeding standard limits.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773058549995\"><strong class=\"schema-faq-question\">Will hitting the limit affect my account permanently?<\/strong> <p class=\"schema-faq-answer\">A single limit hit doesn&#8217;t cause permanent damage. However, repeatedly hitting limits (especially if messages generate spam complaints) may trigger additional restrictions. Gmail watches for abuse patterns.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>The 550 5.4.5 error means you&#8217;ve exceeded Gmail&#8217;s daily sending quota \u2014 Gmail caps outgoing messages to prevent spam abuse.&nbsp; Fix it by waiting 24 hours for the limit to reset. To prevent recurrence, reduce daily sending volume, avoid excessive recipients per message, and consider Google Workspace or SMTP relay for higher limits. Unlike authentication [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5228,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[38],"tags":[],"class_list":["post-5227","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-errors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How To Fix 550 5.4.5 | Gmail Daily Sending Limit Exceeded<\/title>\n<meta name=\"description\" content=\"The 550 5.4.5 error means you&#039;ve exceeded Gmail&#039;s daily sending quota \u2014 Gmail caps outgoing messages to prevent spam abuse.\u00a0Here&#039;s a fix!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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Gmail watches for abuse patterns.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"uagb_featured_image_src":{"full":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",3028,1927,false],"thumbnail":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",150,95,false],"medium":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",300,191,false],"medium_large":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",768,489,false],"large":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",1024,652,false],"1536x1536":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",1536,978,false],"2048x2048":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",2048,1303,false],"profile_24":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",24,15,false],"profile_48":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",48,31,false],"profile_96":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",96,61,false],"profile_150":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",150,95,false],"profile_300":["https:\/\/emailwarmup.com\/blog\/wp-content\/uploads\/2026\/03\/550-5.4.5-_11zon.jpg",300,191,false]},"uagb_author_info":{"display_name":"Daniyal Dehleh","author_link":"https:\/\/emailwarmup.com\/blog\/author\/daniyaldehleh\/"},"uagb_comment_info":0,"uagb_excerpt":"The 550 5.4.5 error means you&#8217;ve exceeded Gmail&#8217;s daily sending quota \u2014 Gmail caps outgoing messages to prevent spam abuse.&nbsp; Fix it by waiting 24 hours for the limit to reset. To prevent recurrence, reduce daily sending volume, avoid excessive recipients per message, and consider Google Workspace or SMTP relay for higher limits. Unlike authentication&hellip;","_links":{"self":[{"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/posts\/5227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/comments?post=5227"}],"version-history":[{"count":1,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/posts\/5227\/revisions"}],"predecessor-version":[{"id":5229,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/posts\/5227\/revisions\/5229"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/media\/5228"}],"wp:attachment":[{"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/media?parent=5227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/categories?post=5227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/emailwarmup.com\/blog\/wp-json\/wp\/v2\/tags?post=5227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}