{"id":16685,"date":"2026-04-24T04:22:10","date_gmt":"2026-04-24T01:22:10","guid":{"rendered":"https:\/\/itexpert.top\/?p=16685"},"modified":"2026-04-24T12:53:53","modified_gmt":"2026-04-24T09:53:53","slug":"outlook-not-sending-emails","status":"publish","type":"post","link":"https:\/\/itexpert.top\/en\/outlook-not-sending-emails.html","title":{"rendered":"Outlook Not Sending Emails"},"content":{"rendered":"<h2 style=\"text-align: center;\">Outlook Not Sending Emails<\/h2>\n<p><b>Short description:<\/b> Outlook not sending emails? Fix Outlook issues and email errors with this step-by-step guide. Learn how to configure SMTP, check network settings, and resolve common problems in Windows for stable email performance.<\/p>\n<h3>When this problem occurs<\/h3>\n<ul>\n<li>Outlook is working in offline mode due to network issues.<\/li>\n<li>Incorrect SMTP server settings or wrong account password.<\/li>\n<li>Emails are stuck in the Outbox due to large or corrupted attachments.<\/li>\n<li>Conflicts with add-ins or a damaged PST data file.<\/li>\n<li>Authentication problems or restrictions from the email provider.<\/li>\n<\/ul>\n<h3>Step-by-step instructions<\/h3>\n<ol>\n<li><b>Check connection status in Outlook.<\/b> Look at the bottom-right corner of Outlook. If you see Working Offline, Disconnected, or Trying to connect, go to the <b>Send\/Receive<\/b> tab and disable <b>Work Offline<\/b>. Then test your internet connection by opening a website. If needed, restart your router. This solves many Outlook network issues.<\/li>\n<li><b>Clear the Outbox folder.<\/b> Open the Outbox and move stuck emails to Drafts. Open each email, remove large attachments (over 5 MB), and resend. Large or corrupted attachments often block sending. You can also upload files to OneDrive and send links instead.<\/li>\n<li><b>Check account settings.<\/b> Go to <b>File<\/b> &gt; <b>Account Settings<\/b> &gt; <b>Account Settings<\/b>. Select your email and click <b>Change<\/b>. Verify SMTP settings: Gmail uses smtp.gmail.com with port 587 and STARTTLS, Outlook uses smtp-mail.outlook.com port 587. Enable SMTP authentication and update your password if needed. If you use two-factor authentication, create an app password.<\/li>\n<li><b>Disable add-ins in safe mode.<\/b> Launch Outlook in safe mode (Outlook \/safe). If sending works, go to <b>File<\/b> &gt; <b>Options<\/b> &gt; <b>Add-ins<\/b>. Disable all COM add-ins, restart Outlook, and enable them one by one to find the problematic one.<\/li>\n<li><b>Repair PST file and profile.<\/b> Run scanpst.exe and select your PST file. Click Start to repair. If it doesn\u2019t help, create a new Outlook profile in Control Panel and configure your account again. This resolves serious Outlook issues.<\/li>\n<\/ol>\n<h3>Useful tips<\/h3>\n<ul>\n<li>Archive old emails regularly to keep PST file under 50 GB.<\/li>\n<li>Use IMAP instead of POP for better synchronization.<\/li>\n<li>Keep Outlook updated via Office updates.<\/li>\n<li>Use cloud links instead of large attachments.<\/li>\n<li>Check email rules to avoid blocking messages.<\/li>\n<\/ul>\n<h3>Common mistakes<\/h3>\n<p>Users often ignore offline status, leaving emails stuck in Outbox. Using outdated passwords causes authentication errors. Sending files larger than allowed blocks the queue. Antivirus add-ins can conflict with SMTP. Not repairing PST files leads to repeated errors. Avoid these mistakes for stable Outlook performance.<\/p>\n<h3>Frequently asked questions:<\/h3>\n<h3>Does this work on other Windows versions?<\/h3>\n<p>Yes, works on Windows 10 and 11 with Outlook 2016-2021.<\/p>\n<h3>Does it affect performance?<\/h3>\n<p>No, repairs do not slow down your system.<\/p>\n<h3>Does this work on laptops?<\/h3>\n<p>Yes, fully compatible.<\/p>\n<h3>Do I need to restart the computer?<\/h3>\n<p>Not always, but restarting Outlook is recommended.<\/p>\n<h3>Do I need to remove old versions?<\/h3>\n<p>No, updating Outlook is enough.<\/p>\n<h3>Can Windows updates cause this?<\/h3>\n<p>Rarely, but check Outlook updates after system updates.<\/p>\n<h3>How to check if fixed?<\/h3>\n<p>Send a test email and ensure Outbox is empty.<\/p>\n<h3>Can I use older versions?<\/h3>\n<p>It is recommended to use the latest version.<\/p>\n<h3>What if the issue returns?<\/h3>\n<p>Check network, archive PST, or contact provider support.<\/p>\n<h2>Conclusion<\/h2>\n<p>Outlook not sending emails is usually caused by network issues, incorrect settings, or data file problems. This step-by-step guide helps fix email errors quickly and ensures stable Outlook performance in Windows.<\/p>\n<hr \/>\n<h3>Read also<\/h3>\n<ul>\n<li><a href=\"https:\/\/itexpert.top\/en\/windows\">WINDOWS<\/a><\/li>\n<li><a href=\"https:\/\/itexpert.top\/en\/it-blog\/programs\">Programs<\/a><\/li>\n<li><a href=\"https:\/\/itexpert.top\/en\/it-blog\/cmd-commands\">CMD Commands<\/a><\/li>\n<li><a href=\"https:\/\/itexpert.top\/en\/it-blog\/antivirus\">Antivirus<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Outlook Not Sending Emails Short description: Outlook not sending emails? Fix Outlook issues and email errors with this step-by-step guide. Learn how to configure SMTP, check network settings, and resolve common problems in Windows for stable email performance. When this &hellip; <\/p>\n","protected":false},"author":1,"featured_media":16615,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Outlook Not Sending Emails - ITexpert","description":"Outlook Not Sending Emails Short description: Outlook not sending emails? Fix Outlook issues and email errors with this step-by-step guide. 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