How to fix 0x800c0004 error code in Mail app?

What causes How to fix 0x800c0004 error code in Mail app?

Windows Store Apps Troubleshooter not run
Mail app not reset
Email sync not enabled
Mail app not reinstalled

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Hello. I cannot figure out how to add my Yahoo account to the Mail app on Windows 11. Every time I try I get the 0x800c0004 error code. What should I do?

Windows 11 is the newest version of the operating system from Microsoft. It comes with many features, including a new user interface,[ref en-1] design, and customization abilities. The same as previous versions, Windows 11 comes with Microsoft's clients for different tasks.

The Mail app in Windows is the default client to connect and manage all email accounts from one place without having to load different websites to check emails. It supports Office 365, Exchange, Outlook.com, Gmail, Yahoo! and other accounts which is very handy.

However, some people have run into issues when trying to add their Yahoo account to the Mail app in Windows 11. Users say that they get the 0x800c0004 error code and the process fails. It is unknown why exactly this could be happening but in this guide, you will find 4 steps that might help you solve the issue.

Manual troubleshooting can be a lengthy process so you can try using a maintenance tool like [d1] that could help you fix 0x800c0004 error code in Mail app. This powerful software can fix various system errors, BSODs,[ref en-2] corrupted files, and registry[ref en-3] issues. Otherwise, follow the step-by-step instructions below carefully.

How to fix 0x800c0004 error code in mail app

Method 1. Run Windows Store Apps Troubleshooter

Click on Start then go to Settings and choose System
Click on Troubleshoot on the right
Click on Other troubleshooters
Locate Windows Store Apps and press Run

Method 2. Reset the Mail app

Open Settings
Go to System and choose Apps & features
Click on Mail app
Then click on Advanced options
Press on the Reset button

Method 3. Enable Email Sync

Go to your Settings
Choose Accounts, then go to Email & accounts

Select Manage and at the bottom set Email sync to on
Save the changes

Method 4. Reinstall the Mail app

Open the Settings
Click Apps and choose Apps & features
Look for Mail and Calendar
Click on the three vertical dots next to it and click the Uninstall button

Open the Microsoft Store app, search for the Mail and Calendar app
Click on the Install button to download and install it

Bottom line

To fix the 0x800c0004 error code in the Mail app, you can try running the Windows Store Apps Troubleshooter, resetting the Mail app, enabling email sync, or reinstalling the Mail app. If none of these methods work, consider using a maintenance tool to help resolve the issue.

Frequently asked questions

What does the 0x800c0004 error code in the Mail app indicate on Windows 10 or Windows 11?

The 0x800c0004 error code typically signifies issues with connectivity or settings, preventing the Mail app from syncing emails properly. This can be caused by network problems or incorrect account configurations.

How can I resolve the 0x800c0004 error in the Mail app on Windows 11?

To fix the 0x800c0004 error, try resetting the Mail app by navigating to Settings > Apps > Apps & features, selecting Mail, and clicking on 'Advanced options' to reset it. Additionally, ensure that your internet connection is stable and that your account settings are correct.

Are there any specific settings I should check if I encounter the 0x800c0004 error on Windows 10?

Yes, make sure that your Windows 10 firewall or antivirus is not blocking the Mail app's access to the internet and verify that your email account settings, like the server information, are accurately configured.

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Written & verified by

Ryan Mitchell

Hardware & Driver Specialist

Hardware troubleshooting Driver installation and rollback Device Manager errors USB and peripheral issues Firmware updates

Ryan Mitchell specialises in hardware troubleshooting and driver management for Windows systems. His expertise covers device recognition failures, driver conflicts, firmware updates, and peripheral connectivity issues across all major manufacturers. Ryan's systematic approach to hardware diagnosis — starting with Device Manager, working through driver rollback and clean installs, and escalating to BIOS-level checks — has made his guides a reliable resource for both home users and field technicians. He covers GPUs, printers, audio devices, USB controllers, network adapters, and external storage.

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