Five ways to fix the "No default mail client" error

The full description of the "No Default Mail Client" error is: "No Default Mail Client, or the current Mail Client cannot complete the mail request. Please run Microsoft Outlook and set it as the default mail client." This article provides several effective ways to resolve this issue.

Cause of error

The most common reason for this error is that the system mail client is incorrectly configured, i.e. Outlook is not set as the default mail client. Additionally, Outlook registry and add-in errors can also cause this error.

Solution

Here are five ways to resolve the "no default mail client" error:

Method 1: Set Outlook as the default mail client

This is the method you should try first. The steps are as follows:

1. Enter "Default Apps" in the Windows search box, and then click "Default App Settings" under "Best Match".
2. In the Email section, click the app name (for example, Mail).
3. Select "Outlook" as the default mail client.

4. Check if the "No Default Mail Client" error has been resolved.

Method 2: Delete Outlook registry key

1. Press the Windows R key combination to open the "Run" window.
2. Enter regedit in the box and click OK to open the Registry Editor.
3. If the confirmation window appears, select Yes.
4. Enter Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Microsoft Outlook in the registry path.

5. Right-click Microsoft Outlook and select Delete.

6. Confirm your selection and restart the computer to check if the "No default mail client error in Outlook" issue has been resolved.

Method 3: Fix Microsoft Office

Since Outlook is included in Microsoft Office, it can also cause a "No Default Mail Client" error if the Office is corrupted. At this point, fixing Microsoft Office is an effective way to solve this problem. For specific repair steps, please refer to: Microsoft Office Repair Tools | Repair Office Applications

Method 4: Delete Outlook add-in

Add-ins in Outlook can help you automate tasks when viewing or creating emails. However, some add-ins may cause "No default mail client" error. Please follow these steps to delete them:

1. Start Outlook and go to File > Options > Add-ins .
2. Click Go next to "COM Add-in".

3. If present, uncheck iCloud add-in and Outlook change notifier .
4. Click OK to save the changes and confirm that the email client problem has been resolved.

Method 5: Disable Cortana

Cortana is a personal productivity assistant in Microsoft that can help you manage calendars, set reminders and more. According to network information, disabling Cortana is also one of the ways to solve the problem of email client.

1. Press the Windows R key, enter regedit in the box, and press Enter .
2. Enter HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows in the registry path and press Enter .
3. Right-click on the Windows folder and select New > key . Set the name of the value to " Windows Search ".

4. Right-click on the Windows Search folder and select New > DWORD (32-bit) value .

5. Name it AllowCortana .
6. Double-click it to set the numerical data to 0. Then click "OK" to save.

Summarize

This article introduces five ways to solve the problem of "no default mail client". Hope you find a way that suits you. If you have a better solution, please share it in the comment section.

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