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5396outlook-performance-fixes
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  • 5396outlook-performance-fixes
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Opened Sep 18, 2025 by Rosario Mendenhall@rosariomendenh
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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 Outlook performance fixes 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 Outlook isn't working on a large or long process, move on to the next step.

Things changed on February 1st, 2024 when Google and Yahoo started applying new email sender standards in an attempt to improve their users’ experience. Even with the correct SMTP details, the server might be down or malfunctioning. Understanding the specific error codes returned by the SMTP server can help diagnose the issue. Mistyped usernames or passwords can prevent successful authentication with your SMTP server, leading to failed email sends. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app.

Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. This issue has been mitigated and we are continuing to monitor the issue to ensure stability. The root cause was the deployment of an incorrect campaign data file, which led to false positive campaign detection. We have since reverted to the right data file and the outbound email flow has returned to a normal state. We also released a new rule that corrected the wrong campaign verdict for all impacted customers during the incident.

3 answersClose Outlook.Press Windows + R to open the Run dialog box.Type Outlook.exe /safe and press Enter.If Outlook starts in Safe Mode, try disabling add-ins by going to File >Options >Add-ins, then disable all add-ins and restart Outlook normally.Aug 29, 2024

We are aware that some users may not be able to receive email from Gmail accounts. Although it's not possible at the moment to turn the feature off entirely, you can choose to remove it from your favorites list by right clicking the folder and selecting Remove from Outlook performance fixes Favorites. This issue has been fixed for Outlook.com country domains.

You may find missing mail items after setting up a new profile. You may also create a new Outlook profile to resolve the send and receive errors. Outlook Error 0x a shows an error of server timeout with Outlook’s receive/ send functionality. This error is caused due to connectivity problems and inappropriate settings with the files of Outlook data. After this, restart the system and launch Outlook to check if the Outlook send and receive error is resolved.

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.

The default SMTP port (25) may be blocked by some Internet Service Providers (ISPs) due to spam concerns. Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com Outlook performance fixes account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. If you are having issues sending email, this might be due to validation issues with your Microsoft Account.

Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost).

Start Outlook in safe mode to fix "Processing" screenIn Windows 10, choose Start, type Outlook.exe /safe, and press Enter.In Windows 7, choose Start, and in the Search programs and files box, type Outlook /safe, and then press Enter.In Windows 8, on the Apps menu, choose Run, type Outlook /safe, and then choose OK.

Microsoft Outlook is an excellent application with a wide range of features. With Outlook, you can access email, calendar, contacts, and more in a single app, making it user-friendly. Still, like other apps, Outlook also runs into issues sometimes. The above procedures will help you to resolve the Microsoft Outlook Stuck on Loading Profile error. If you are still facing the same issue, it means your PST file is damaged. If you want to repair your corrupted PST file, opt for the Cigati PST Repair Tool.

If the check box is cleared, the service or startup program doesn't run when you restart the computer. Repairing your Office programs can resolve issues with Outlook not responding or freezing. Errors in Microsoft 365 files are repaired automatically. If Outlook isn't stuck at a screen that says "Processing," or this didn't resolve your issue, continue to the steps below. Outlook may remain stuck if other Office applications or processes are running in the background.

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Reference: rosariomendenh/5396outlook-performance-fixes#1