Troubleshooting “The current mail client cannot fulfill the messaging request” Error in MS Outlook

Some Outlook users complain about a problem they encounter on their computers. When they try to send an e-mail message, Outlook displays an error message stating that there is no default e-mail client or that the current e-mail client cannot respond to the message request.

If you get this error message, just follow the solutions suggested in this article and the problem will be solved quickly. Be sure to try these workarounds before choosing the basic solutions.

What causes the message “Current email client cannot respond to message request”?

  • This problem can occur if the Outlook registration key is unavailable or corrupted. When other programs try to use the simple Outlook MAPI interface, they cannot get the necessary information from the registry.
  • This error indicates that the default email client is not installed or is installed on an application other than Microsoft Outlook, especially in a scenario where there are two email clients (presumably Outlook Express and Microsoft Outlook) and Outlook has not been installed as the default client.

How to eliminate the error message “The current email client cannot respond to a message request”?

Configure the default email application

  1. Press the Windows key and type Default Applications. Then select Default Applications.
  2. Now check to see if the default email application is set to Outlook. If not, click on the application and select Outlook as the default application. Restart your computer and see if the problem is fixed.
  3. In step 2, if the default application is already Outlook, click and change the default application to another application and restart your computer.
  4. After restarting, switch the default e-mail application back to Outlook and see if the problem is resolved.
    If not, start Outlook and open the settings.
  5. On the General tab, turn on the Make Outlook the default program for email, contacts, and calendar (if the option is already enabled, turn it off and on again).
  6. Now click OK and restart your computer.
  7. Then check to see if the system has resolved the problem with the email client.
  8. If not, open the default applications (step 1) and click the Reset button (at the bottom of the screen).
  9. Now check if the problem with the email client has been resolved.

Restoring the Office installation

  1. Press Windows + X and select Applications and Features.
  2. Then expand your Office installation and click Edit.
  3. Now select Quick Fix and follow the instructions to complete the process.
  4. Then check to see if the problem with your email client is resolved.
  5. If not, repeat steps 1-2, but select Online Repair (not Quick Repair).
  6. Then follow the instructions to complete the Office Repair.

Remove the Outlook add-in

  1. Start Outlook and open the File menu.
  2. Now select Options, then Add-Ins on the left tab.
  3. Then click Go (make sure that COM add-ins are selected in the Manage drop-down list).
  4. Now disable the iCloud add-in and check if the problem with the email client is resolved.
  5. If not, disable Change Notifier (the iTunes add-in for Outlook) and see if the problem with the email client is resolved.
  6. If that doesn’t solve the problem, you may have to uninstall the iCloud app.

Disable Cortana

  1. Press the Windows key and type Cortana in the Windows search bar.
  2. Then right-click on Cortana (in the results) and select Application Settings.
  3. Now disable the Cortana toggle in the Runtime section when you log in.
  4. Then right-click on the Windows key to open the DeepL access menu, and select Task Manager.
  5. Now switch to the Start tab and right-click on Cortana.
  6. Then select Disable and check that the system has fixed the problem with the email client.

Frequently Asked Questions

  1. Open Outlook.
  2. On the File tab, click Options.
  3. Under Startup Options, select the Set Outlook as the default email, contacts, and calendar program check box.
  4. Click OK.

  1. Run the registry editor (regedit.exe).
  2. Go to HKEY_LOCAL_MACHINESOFTWAREClientsMail.
  3. Double-click on the value (default) and set it to "Microsoft Outlook" (do not enter quotes).
  4. Change the HKEY_CLASSES_ROOT\mailto.

  1. Right-click the Start button, then select Run.
  2. Type Regedit; click OK to launch the registry editor.
  3. Find or create the HKEY_CURRENT_USER\Software\Clients\Mail key.
  4. Change the default setting (REG_SZ) to Windows Mail.

Go to Settings -> Applications -> Default Applications. In the right pane under "Email" you will see that the Mail app is installed there. Just click on it and select the email application you want to use by default from the list.

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