Sometimes you send an email and discover later that it is not delivered to the intended recipient. By following this checklist, you can systematically troubleshoot and resolve most common email sending issues. If you typically use an Outlook.com account for email, this issue can occur if there are multiple aliases on the account and the 3rd party email address is the primary alias. Customers with only a 3rd party email address set up as the username of their Microsoft Account will be asked to add a 1st party Microsoft alias to their account before accessing Outlook.com.

You can determine if it's corrupted by creating a new profile and troubleshoot Outlook errors changing which profile is used when Outlook starts. Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you. To work around the issue, you will need to end all Office processes that are running and disable the presence features.

If your antivirus software includes integration with Outlook, you may experience performance issues. You can disable all Outlook integration within the antivirus software. Or, you can disable any antivirus software add-ins that are installed in Outlook.

For example, writing gamil.com instead of gmail.com is a common typo that will cause problems with delivery. If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. Refer to our comprehensive list of common SMTP settings or consult your email provider for the correct parameters. Incorrect SMTP parameters are a frequent cause of email sending issues. Your email client needs the correct settings to communicate with the SMTP server. To access the calendar troubleshoot Outlook errors shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android.

We have multiple tools to help you automatically diagnose an issue, troubleshoot, and fix problems with Outlook. If Startup Repair detects any of these issues, it will attempt to fix them automatically. If it cannot fix the problem, it will provide a detailed report of the issues it found.

Find solutions to common problems or get help from a support agent. To get help and troubleshoot other Microsoft products and services, enter your problem here. Some customers may troubleshoot Outlook errors not be able to see their Profile, Account or Sign Out options when selecting their picture on the top toolbar. Some users may not be able to empty their Deleted Items folder. We will update this article as soon as we have more information on a fix. While we fix the problem, you can send the file as a OneDrive link.

If the network is performing slowly, Outlook must wait for read and write operations to the AppData directory to finish. We recommend that you move several items in your larger folders to separate folders, or that you archive those items by using the AutoArchive feature. Make sure that the latest updates for Outlook are installed. For more information, see How troubleshoot Outlook errors to install the latest applicable updates for Microsoft Outlook (US English only). For more information, see Support for Office 2016 and 2019 clients connecting to Microsoft 365 services has ended. Running the /resetnavpane command removes all customizations to the navigation pane.

To sum up, we explored several methods to fix "Outlook won’t open" errors. Whether it’s a profile issue, a corrupted PST file, or faulty add-ins, the methods above can help you get Outlook running again. When Microsoft Outlook refuses to open, it’s incredibly frustrating. This issue often stems from common culprits like a corrupted user profile, a damaged data file (PST or OST), or even a minor conflict within its settings or add-ins.

If your Outlook keeps freezing, despite all your effort, it’s time to bring in the professionals. When opening certain messages, Outlook might be loading content from the internet. This can result in delays or even a full Outlook freeze on slower connections. If you can't find a dialog box open, move on to the next step. A troubleshoot Outlook errors vast community of Microsoft Office365 users that are working together to support the product and others. Outlook stores certain data, such as email signatures and the spelling checker dictionary, in the AppData folder.

If you try to perform other actions while Outlook is in use, Outlook may not respond. Let the task in process finish its job before you try another action. Performance may be decreased if you use the Outlook AutoArchive feature or sync to Outlook with a mobile device. These steps are provided in a specific order based on commonality and complexity. If the troubleshooter can't fix your issue, or if you'd like to fix it yourself, see the next section. Create your account and connect with a world of communities.

Simply that Outlook will be loaded without your add-ins and customization files. Many users experience the same confusion by asking themselves, "Why is my browser so slow? " The problem of slow browser performance affects users of Google Chrome, Mozilla Firefox, Safari, Microsoft... Whether it’s creating a new outlook profile or setting up your primary email, we’ve got you covered. Sometimes a Windows update or app update—meant to fix things—ends up causing the problem.