1) Check the Encryption Settings

When setting up email on Outlook, you must ensure that you have used the recommended SSL/TLS as specified by your email provider. If anything has changed, you may want to modify and update the connection.

• On Outlook, you can access your account settings
• Find your account and click Manage
• Run the configuration settings, you can configure them with detailed steps.

2) Test on another machine

If your problem goes away when you restart your computer and comes back after some time, you can check if the same problem persists on another computer. If this is the case, you can reset Outlook and set things up again to fix the problem on your computer.

3) Create a new Outlook profile

Another way to fix such problems is to create another profile. Outlook supports multiple profiles and you can link a set of emails to an Outlook profile. It’s handy to keep your work and personal email settings separate.

This helps when there are damaged profiles or data files. go to Control Panel > Mail > Show Profiles > Add and set up a new profile with your email account to test if the issue persists.

4) Disable add-ons (safe mode)

Outlook, like any other software, supports add-ons that enhance the experience. However, these add-ons can sometimes create conflicts, leading to errors like these.

To test, you can launch Outlook in safe mode and check if the issues persist. To do this, press Win + Rtype outlook /safeand press the Enter key. Use Outlook in this mode and monitor if the error occurs again.

If there are no errors, go to Outlook > File > Options > Add-ins. Click manage, then turn them all off. After that, enable them individually and check which one is causing the problem.

5) Examine the Windows event logs

Finally, you can check Windows Event Viewer for any Outlook-related log or email errors during the failure. This can provide insight into underlying issues. If you find it, you can connect with Microsoft support or anyone who can investigate deeper system-level causes or software errors.

Hope this helps.

Why does the Outlook error appear only after 8-12 hours of use, but works fine after a restart?

This can be due to resource exhaustion or memory leaks over time. Specific processes (such as background services or add-ons) may consume more and more memory or CPU resources as the computer is used. Ultimately, this could affect Outlook’s ability to set up secure connections, leading to an encryption failure. Restarting temporarily frees these resources, allowing Outlook to function normally until the problem occurs again.

Could system hibernation or sleep mode cause Outlook to crash after prolonged use?

System sleep or hibernation can disrupt network and encryption settings when the computer resumes. After waking from sleep, the network connection may not reset completely, causing Outlook to experience problems with encrypted connections. To prevent this, make sure your network adapters are configured to stay active during hibernation in Device Manager and consider temporarily disabling hibernation to test if the issue is resolved.