{"id":23080,"date":"2023-11-09T09:24:27","date_gmt":"2023-11-09T03:54:27","guid":{"rendered":"https:\/\/www.stellarinfo.co.in\/blog\/?p=23080"},"modified":"2023-12-27T18:15:11","modified_gmt":"2023-12-27T12:45:11","slug":"outlook-365-is-not-sending-emails","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/","title":{"rendered":"Why Outlook \u200d365 is Not Sending Emails and How to Fix It?"},"content":{"rendered":"<table style=\"border: 2px dashed #eee; height: 59px;\" width=\"977\">\n<tbody>\n<tr>\n<th style=\"background-color: #eee; text-align: justify;\"><strong>Summary: Sometimes Outlook stops sending or receiving emails and accumulates them in the Outbox folder. Even if you try to reset or delete and send again, the messages remain stuck in the Outbox. In this guide, you will learn the reasons and solutions to troubleshoot and fix Outlook \u200d365 Not Sending Emails\u00a0issue.<\/strong><\/p>\n<p><strong><span style=\"font-weight: 400;\"><a href=\"https:\/\/cloud.stellarinfo.co.in\/blog\/ost-pst\/StellarConverterforOST.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22794 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/free-download-Win.png\" alt=\"Stellar Download\" width=\"260\" height=\"80\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/free-download-Win.png 260w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/free-download-Win-150x46.png 150w\" sizes=\"auto, (max-width: 260px) 100vw, 260px\" \/><\/a><\/span><\/strong><\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400;\">Outlook 365 offers a cloud-based messaging platform that delivers a range of features and functionalities. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">When you send a message or email using Outlook 365, the email is not sent immediately. Instead, Outlook stores the email in Outbox and then synchronizes the local changes stored in the OST file with the mailbox server (Exchange Online or Microsoft 365 server). <\/span><\/p>\n<p><span style=\"font-weight: 400;\">As a result, the email is sent after some delay (usually a minute or so). However, if there is an issue with the Outlook client, data file (.OST), or the mail server, it can lead to connectivity and synchronization issues that can prevent Outlook 365 from sending and receiving new emails.<\/span><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/fixed-outlook-stuck-on-processing-error\/\" target=\"_blank\" rel=\"noopener\">How to Fix \u201cOutlook Stuck on Processing\u201d Error?<\/a><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">In this guide, you will learn the common reasons behind Outlook 365 not sending emails and solutions to troubleshoot and fix the issue.<\/span><\/p>\n<p><a href=\"https:\/\/www.stellarinfo.co.in\/software\/buy\/ost-pst\/buy-now.php?utm_source=Blog&amp;utm_medium=OST-PST&amp;utm_campaign=Blog-Mid-Banner\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22994 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/mid-banner-Stellar-Converter-for-OST.jpg\" alt=\"mid-banner-Stellar-Converter-for-OST\" width=\"850\" height=\"350\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/mid-banner-Stellar-Converter-for-OST.jpg 850w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/mid-banner-Stellar-Converter-for-OST-300x124.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/mid-banner-Stellar-Converter-for-OST-150x62.jpg 150w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/mid-banner-Stellar-Converter-for-OST-768x316.jpg 768w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/09\/mid-banner-Stellar-Converter-for-OST-610x250.jpg 610w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/a><\/p>\n<p><strong>Table of Content:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/#srv1\"><strong>Reasons to Outlook \u200d365 Not Sending Emails Issue<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/www.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/#srv2\"><strong>Solutions to Troubleshoot and Fix the Outlook \u200d365 Not Sending Emails Issue<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/www.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/#srv3\"><strong>Conclusion<\/strong><\/a><\/li>\n<\/ul>\n<h2><strong id=\"srv1\">Reasons to Outlook \u200d365 Not Sending Emails Issue<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">There are several reasons that can trigger the Outlook 365 not sending emails issue. <\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Inconsistent or oversized Outlook (.OST) data file<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Incompatible or faulty add-ins<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The mailbox quota is full<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sending large or multiple attachments<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Poor or unstable internet<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Wrong or incorrect account settings<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Issues with Outbox<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Outdated Outlook version\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Corrupt MS Office program files<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Corrupt Outlook profile<\/span><\/li>\n<\/ul>\n<h2><strong id=\"srv2\">Solutions to Troubleshoot and Fix the Outlook \u200d365 Not Sending Emails Issue<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">To troubleshoot the issue of Outlook 365 not sending emails, follow these solutions. <\/span><\/p>\n<h3><b>1. Check Internet and Server Settings- Outlook \u200d365 Not Sending Emails\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">To troubleshoot the issue of Outlook 365 not sending emails, check your network connection. Make sure your internet is stable. For this, <\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Open web browser and visit any website.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">You may also go to the Outlook 365 webmail page and log in to verify if the internet is working and the Microsoft 365 server is online in the region.<\/span><\/li>\n<\/ul>\n<h3><b>2. Check Mailbox Quota and Reduce Mailbox Size<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Sometimes, emails may get stuck in the Outbox, and Outlook 365 may fail to send emails when there are large attachments or multiple attachments. Your organization may allow certain sizes of attachments to be shared over email to conserver mailbox storage. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">In some cases, it could be mailbox full or reaching its quota size. In such a case, Outlook can\u2019t store more mail items and may fail to synchronize the changes with the mailbox server as the mailbox is full, leading to failures in sending emails. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">You can send attachments via shared folders or file servers in such cases. You may also use a cloud server and share links to attachments in the email. <\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Open Outlook and click the <\/span><b>Outbox<\/b><span style=\"font-weight: 400;\"> folder.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Find the email stuck in the Outbox and then remove any attachments that are too large and reduce the number of attachments.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Upload the large or multiple attachments to a cloud storage and then send the email.\u00a0<\/span><\/li>\n<\/ul>\n<p><strong>To make space for new mail items and reduce the mailbox size, you can follow these steps:<\/strong><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Open Outlook and go to<\/span><b> File &gt; Info &gt; Tools<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Choose <b>Mailbox Cleanup<\/b> and then click the\u00a0<b>View Deleted Mailbox Size<\/b>\u00a0button. This will display the mailbox size.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23086 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button_.jpg\" alt=\"Choose Mailbox Cleanup and then click the View Deleted Mailbox Size button\" width=\"407\" height=\"348\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button_.jpg 407w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button_-300x257.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button_-150x128.jpg 150w\" sizes=\"auto, (max-width: 407px) 100vw, 407px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23085 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button-2.jpg\" alt=\"Choose Mailbox Cleanup and then click the View Deleted Mailbox Size button\" width=\"536\" height=\"511\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button-2.jpg 536w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button-2-300x286.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Choose-Mailbox-Cleanup-and-then-click-the-View-Deleted-Mailbox-Size-button-2-150x143.jpg 150w\" sizes=\"auto, (max-width: 536px) 100vw, 536px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">To reduce the mailbox size, click <\/span><b>Close<\/b><span style=\"font-weight: 400;\">.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Then in the<\/span><b> Mailbox Cleanup<\/b><span style=\"font-weight: 400;\"> window, use Empty Deleted Items and Archive options to reduce the mailbox size.\u00a0<\/span><\/li>\n<\/ul>\n<p>Doing this will create space for new mail items and allow Outlook 365 to send emails without any interruption.<\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/email-stuck-in-outbox-but-not-showing\/\" target=\"_blank\" rel=\"noopener\">Emails showing in Outbox on the server but not visible in Outlook user\u2019s Outbox?<\/a><\/strong><\/p>\n<p><strong>Also, follow these additional tips:<\/strong><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Restart the system and try to resend the message or email.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Make sure the <\/span><b>Offline mode<\/b><span style=\"font-weight: 400;\"> is not active.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use <\/span><strong><a href=\"https:\/\/aka.ms\/SaRASetup\" target=\"_blank\" rel=\"noopener nofollow\">Microsoft Support and Recovery Assistant<\/a><\/strong><span style=\"font-weight: 400;\">. Follow the wizard to troubleshoot and fix the issue.<\/span><\/li>\n<\/ol>\n<h3><b>3. Update Outlook- Outlook \u200d365 Not Sending Emails\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">You can also check and update Outlook 365 to resolve incompatibility issues or bugs that may be preventing Outlook 365 from sending or delivering emails. <\/span><\/p>\n<p><strong>The steps are as follows:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">1. Open <\/span><b>Outlook <\/b><span style=\"font-weight: 400;\">and go to <\/span><b>File<\/b><span style=\"font-weight: 400;\"> &gt; <\/span><b>Office Account <\/b><span style=\"font-weight: 400;\">or <\/span><b>Account<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>2. Click <b>Update Options<\/b> and choose <b>Update Now<\/b>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23084 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Update-Outlook.jpg\" alt=\"Outlook \u200d365 Not Sending Emails\" width=\"650\" height=\"325\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Update-Outlook.jpg 650w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Update-Outlook-300x150.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Update-Outlook-150x75.jpg 150w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">3. Follow the onscreen prompts to download the updates and then install them.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If this <\/span><b>Update Now<\/b><span style=\"font-weight: 400;\"> option is not available in Outlook, you can check and install <\/span><b>Windows Updates<\/b><span style=\"font-weight: 400;\"> as it may also help you download and apply MS Office updates containing Outlook bug features that may help resolve any incompatibility issues or bugs causing the error. <\/span><\/p>\n<h3><b>3. Disable Add-Ins<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Try to disable the add-ins and then send an email. If the email gets delivered, it\u2019s an incompatible or faulty add-in causing the issue. To find out which, follow these steps:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">1. Close Outlook.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2. Press<\/span><b> Windows + R<\/b><span style=\"font-weight: 400;\">, type <\/span><b>Outlook.exe \/safe, <\/b><span style=\"font-weight: 400;\">and click <\/span><b>OK<\/b><span style=\"font-weight: 400;\"> to open Outlook in safe mode.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23089 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Disable-Add-Ins.jpg\" alt=\"Disable Add-Ins\" width=\"399\" height=\"206\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Disable-Add-Ins.jpg 399w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Disable-Add-Ins-300x155.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Disable-Add-Ins-150x77.jpg 150w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/p>\n<p>3. Then go to <em><strong>File &gt; Options &gt; Add-Ins<\/strong><\/em>.<\/p>\n<p>4. Choose COM Add-ins and click on Go.<\/p>\n<p><span style=\"font-weight: 400;\">5. Uncheck all the add-ins and click <\/span><b>OK<\/b><span style=\"font-weight: 400;\">. This will disable all the add-ins.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23092 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Uncheck-all-the-add-ins-and-click-OK.jpg\" alt=\"Outlook \u200d365 Not Sending Emails\" width=\"607\" height=\"259\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Uncheck-all-the-add-ins-and-click-OK.jpg 607w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Uncheck-all-the-add-ins-and-click-OK-300x128.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Uncheck-all-the-add-ins-and-click-OK-150x64.jpg 150w\" sizes=\"auto, (max-width: 607px) 100vw, 607px\" \/><\/p>\n<p>6. Close Outlook safe mode and start Outlook normally.<\/p>\n<p>7. Try to send a new email. If the email is sent successfully, activate one add-in at a time and send another email.<\/p>\n<p>8. If the email gets stuck after activating one of the add-ins, that\u2019s the faulty one.<\/p>\n<p>9. Remove it immediately to fix the issue permanently.<\/p>\n<p><b>NOTE: <\/b><span style=\"font-weight: 400;\">Before moving ahead, back up the OST file before reinstalling Microsoft Office, creating a new profile, or rebuilding the Outlook data file to prevent loss of mail items.<\/span><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/deleted-emails-keep-coming-back-in-outlook\/\" target=\"_blank\" rel=\"noopener\">Why Do Deleted Emails Keep Coming Back in Outlook?<\/a><\/strong><\/p>\n<h3><b>4. Create a New Outlook 365 Profile<\/b><\/h3>\n<p><strong>Follow these steps to create a new Outlook 365 profile and replace the corrupt one:<\/strong><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Close Outlook.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Press<b> Windows + R<\/b>, type <b>%localappdata%\/Microsoft\/Outlook<\/b> and click <b>OK<\/b>.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23088 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Create-a-New-Outlook-365-Profile.jpg\" alt=\"Create a New Outlook 365 Profile\" width=\"399\" height=\"206\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Create-a-New-Outlook-365-Profile.jpg 399w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Create-a-New-Outlook-365-Profile-300x155.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Create-a-New-Outlook-365-Profile-150x77.jpg 150w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Back up the OST file by renaming it with the .bak extension or moving it to a different location.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Then open the\u00a0<\/span><b>Control Panel<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Click\u00a0<\/span><b>User Accounts &gt; Mail (32-bit)<\/b><span style=\"font-weight: 400;\"> &gt;\u00a0<\/span><b>Show Profiles<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23087 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Click-User-Accounts-Mail-32-bit-Show-Profiles_.jpg\" alt=\"Click User Accounts- Mail (32-bit)- Show Profiles\" width=\"425\" height=\"279\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Click-User-Accounts-Mail-32-bit-Show-Profiles_.jpg 425w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Click-User-Accounts-Mail-32-bit-Show-Profiles_-300x197.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Click-User-Accounts-Mail-32-bit-Show-Profiles_-150x98.jpg 150w\" sizes=\"auto, (max-width: 425px) 100vw, 425px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Click\u00a0<\/span><b>Add,<\/b><span style=\"font-weight: 400;\"> type a name, and click\u00a0<\/span><b>OK<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Configure the same email account under this new profile and then remove the old profile.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Make the new profile default as shown in the screenshot below.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23090 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Make-the-new-profile-default-as-shown-in-the-screenshot-below.jpg\" alt=\"Outlook \u200d365 Not Sending Emails\" width=\"537\" height=\"639\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Make-the-new-profile-default-as-shown-in-the-screenshot-below.jpg 537w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Make-the-new-profile-default-as-shown-in-the-screenshot-below-252x300.jpg 252w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Make-the-new-profile-default-as-shown-in-the-screenshot-below-126x150.jpg 126w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Make-the-new-profile-default-as-shown-in-the-screenshot-below-150x178.jpg 150w\" sizes=\"auto, (max-width: 537px) 100vw, 537px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Then open Outlook.\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This should resolve the issue.<\/span><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/outlook-not-updating-mail-folders-in-cached-mode\/\" target=\"_blank\" rel=\"noopener\">Outlook Not Updating Mail Folders in Cached Mode<\/a><\/strong><\/p>\n<h3><b>5. Repair or Reinstall Microsoft Office<\/b><\/h3>\n<p><strong>To repair MS Office, follow these steps:<\/strong><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Open the <\/span><b>Control Panel <\/b><span style=\"font-weight: 400;\">and click <\/span><b>Uninstall a program<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Select Microsoft Office and click <\/span><b>Change<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Select <\/span><b>Repair<\/b><span style=\"font-weight: 400;\"> and click <\/span><b>Next<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Follow the onscreen instructions to complete the repair process.\u00a0<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">After the repair, restart Outlook 365. Then check if you can send emails. If it can\u2019t, try to reinstall the MS Office.<\/span><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/repair-ost-files-in-outlook\/\" target=\"_blank\" rel=\"noopener\">How to Repair OST Files in Outlook?<\/a><\/strong><\/p>\n<h3><b>6. Rebuild Outlook Data File<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">By rebuilding the OST file, you can replace the inconsistent, inaccessible, and oversized OST file that may be preventing Outlook 365 from storing new emails or causing sync issues with the mailbox server, leading to failure in sending new emails.\u00a0 <\/span><\/p>\n<p><span style=\"font-weight: 400;\">The steps to rebuild a new OST file are as follows:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Close Outlook and press\u00a0the <\/span><b>Windows + R<\/b><span style=\"font-weight: 400;\">\u00a0keys.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Type <\/span><b>%localappdata%\/Microsoft\/Outlook<\/b><span style=\"font-weight: 400;\"> and click<\/span><b>\u00a0OK <\/b><span style=\"font-weight: 400;\">to open the default OST file location.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-23091 size-full\" src=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Rebuild-Outlook-Data-File-1.jpg\" alt=\"Outlook \u200d365 Not Sending Emails\" width=\"650\" height=\"243\" srcset=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Rebuild-Outlook-Data-File-1.jpg 650w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Rebuild-Outlook-Data-File-1-300x112.jpg 300w, https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Rebuild-Outlook-Data-File-1-150x56.jpg 150w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Make sure to back up the OST file and then delete it from this location.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">After deleting the OST, start Outlook.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Outlook 365 will create a new OST file, and download all mail items from the mail server. Now if you send any new email, it should be sent immediately.\u00a0<\/span><\/li>\n<\/ul>\n<p><b>IMPORTANT NOTE: <\/b><span style=\"font-weight: 400;\">After rebuilding the OST file, check all mail folders and mail items. If you couldn\u2019t find some emails or mail folders, use <strong>Stellar Converter for OST<\/strong> to extract mail items from the backup OST file and save them to PST format. Then import this PST file to your new profile or OST file via <\/span><b>Import\/Export<\/b><span style=\"font-weight: 400;\"> wizard in Outlook. This will restore all missing mail items.<\/span><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/ost-to-pst-converter-online\/\" target=\"_blank\" rel=\"noopener\">Unlock the Secret: Free Methods to Convert OST to PST in Outlook<\/a><\/strong><\/p>\n<h3><strong id=\"srv3\">Conclusion <\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Outlook 365 is a powerful email client. However, you may encounter issues, such as Outlook 365 not sending emails. However, by following the solutions shared in this guide, you can identify the root cause and resolve the error. To prevent future email-sending issues with Outlook 365, it is advisable to keep Outlook updated and ensure the mailbox is not full or the Outlook data file is not too large or oversized as it can lead to inconsistency and prevent Outlook from saving new mails or synchronizing changes with the mailbox server. Remember to use <a href=\"https:\/\/www.stellarinfo.co.in\/software\/ost-to-pst-converter.php\" target=\"_blank\" rel=\"noopener\"><strong>Stellar Converter for OST<\/strong><\/a> to extract and save emails from your inconsistent, inaccessible, or orphaned OST file to PST format. You may also export the mail items from OST to Microsoft 365 or Live Exchange Server directly.<\/span><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.co.in\/blog\/recover-deleted-e-mails-with-the-help-of-stellar-converter-for-ost\/\" target=\"_blank\" rel=\"noopener\">How to Recover Deleted E-Mails with the Help of Stellar Converter for OST?<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Summary: Sometimes Outlook stops sending or receiving emails and accumulates them in the Outbox folder. Even if you try to reset or delete and send again, the messages remain stuck in the Outbox. In this guide, you will learn the reasons and solutions to troubleshoot and fix Outlook \u200d365 Not Sending Emails\u00a0issue. Outlook 365 offers [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":23083,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[46],"tags":[],"class_list":["post-23080","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ost-to-pst-converter","has_thumb"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Outlook \u200d365 Not Sending Emails [Fixed]<\/title>\n<meta name=\"description\" content=\"Learn the reasons behind this issue and solutions to troubleshoot and fix outlook \u200d365 not sending emails issue.\" \/>\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.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Outlook \u200d365 Not Sending Emails [Fixed]\" \/>\n<meta property=\"og:description\" content=\"Learn the reasons behind this issue and solutions to troubleshoot and fix outlook \u200d365 not sending emails issue.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/\" \/>\n<meta property=\"og:site_name\" content=\"Stellar Data Recovery Blog - Tips and Solutions\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-09T03:54:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-27T12:45:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.stellarinfo.co.in\/blog\/wp-content\/uploads\/2023\/11\/Why-Outlook-365-is-Not-Sending-Emails-and-How-to-Fix-It.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Vandita Jain\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Vandita Jain\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Outlook \u200d365 Not Sending Emails [Fixed]","description":"Learn the reasons behind this issue and solutions to troubleshoot and fix outlook \u200d365 not sending emails issue.","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.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/","og_locale":"en_GB","og_type":"article","og_title":"Outlook \u200d365 Not Sending Emails [Fixed]","og_description":"Learn the reasons behind this issue and solutions to troubleshoot and fix outlook \u200d365 not sending emails issue.","og_url":"https:\/\/www.stellarinfo.co.in\/blog\/outlook-365-is-not-sending-emails\/","og_site_name":"Stellar Data Recovery Blog - 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Besides, she enjoys traveling and trekking.","url":"https:\/\/www.stellarinfo.co.in\/blog\/author\/user11stellar\/"}]}},"_links":{"self":[{"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/posts\/23080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/comments?post=23080"}],"version-history":[{"count":7,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/posts\/23080\/revisions"}],"predecessor-version":[{"id":23551,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/posts\/23080\/revisions\/23551"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/media\/23083"}],"wp:attachment":[{"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/media?parent=23080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/categories?post=23080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stellarinfo.co.in\/blog\/wp-json\/wp\/v2\/tags?post=23080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}