The full error message says this: Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client.

What causes Outlook’s no default mail client error?

The above error message can simply pop up randomly in Windows for some users. Sometimes that error arises when users try to open email MSG files from File Explorer or when they try to share files via emails from Microsoft Office applications. As the no default mail client error occurs in different circumstances, there are a few different causes behind it:

Outlook isn’t your default email client – The error message even instructs users to set Outlook as the default client, so this might be the most viable cause. Wrong Registry paths – The registry might reference old paths that generate the issue when you try to open email files. Fixing the Registry will solve the issue. Incorrect GUID (Globally Unique Identifier) for Outlook – When the error occurs for email file sharing, Outlook’s MSIComponentID registry value might have the wrong GUID. If so, repairing the MS Office suite can be the solution. Cortana interference – Some of our readers have also cited that disabling Cortana has resolved this issue. As there are other causes, however, that potential resolution won’t work for everybody.

Therefore, there are a few ways you might be able to fix the no default mail client Outlook error. This is how you can fix that error in Windows 10.

How can fix the no default mail client error in Outlook?

1. Set Outlook to be the default email client software

2. Repair your Microsoft Office suite

3. Edit the MSMapiApps registry key

The registry key path cited above is for 32-bit Microsoft Office versions installed on 64-bit Windows 10. If you have a 64-bit Microsoft Office version installed on a 64-bit Windows 10 platform, you’ll need to apply this resolution at this registry path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Messaging Subsystem\MSMapiApps If you’re not sure about this here’s our guide on how to check if your Windows OS is 32-bit or 64-bit. SPONSORED

4. Delete the Microsoft Outlook subkey

If you encounter any problems with editing the Registry, our guide on how to gain full access to edit the Registry in Windows 10 will help you.

5. Disable Cortana

Windows 10 Pro and Enterprise users can disable Cortana with Group Policy Editor. You can do so by disabling the Allow Cortana setting at this Group Policy Editor location: Computer Configuration\Administrative Templates\Windows Components\Search Also, you can contact Microsoft’s support service for Windows and Office about this issue. To get in touch with that help service, fill out the description box on the Contact Microsoft Support page and click Get help. Then you can press a Contact Support button. Alternatively, try posting a question on Microsoft’s Windows or Outlook forums. Simply click the Ask a question buttons on those forums to ask the community for potential resolutions. The Microsoft agents and independent advisors there will usually reply to technical queries. Outlook users have widely confirmed the resolutions above can fix the no default mail client error. So, there’s a pretty good chance one of those resolutions will also resolve the same Outlook issue for you. If you have any questions or suggestions, refer to our comments section below, and we will get back to you as soon as possible.

SPONSORED Name * Email * Commenting as . Not you? Save information for future comments
Comment

Δ