Fix Windows Mail app error 0x801901f5

This guide features working solutions to fix Windows Mail app error 0x801901f5 on your Windows 11/10 computer. The error message indicates that the Contacts and Calendar application has failed to sync with the Mail app. The message says the following-

We’re having a problem downloading messages. Make sure you have a connection, and your account info is correct, and then try again.
Error code: 0x801901f5.

Fix Windows Mail app error 0x801901f5

Here are some suggestions that may help you fix Mail app Error code: 0x801901f5. when downloading messages:

Re-enter the account details
Change the privacy settings
Clear Microsoft Store cache
Repair or Reset the Windows Mail App
Uninstall & reinstall the Mail App

1] Re-enter the account details

The first thing you should try is to delete the account followed by re-entering account details. You can do so by following the below steps.

To begin with, open the Start menu by pressing the Windows key.
In the space provided, type Mail and press the enter key.
In the Mail app, click on the Gear icon present at the bottom left corner.
Choose Manage accounts under the Settings window.
Click on the problematic account.
In the Account settings windows that pops up, choose Delete account from this device option.
Confirm your selection in the following window, by pressing the Delete option.
The account has been successfully removed from Mail app.
Now, click on the Gear icon again at the bottom-left corner, and choose Manage accounts.
Click on Add account option.
Enter the credentials to login with the account again.

That’s it. Check if the problem is fixed or not. If not, try the next solution on the list.

See: Error 0x80040154 in Mail & Calendar app on Windows

2] Change the privacy settings

The Mail and Calendar app need access to your email to work as intended. If this isn’t the case, you are most likely to face Windows Mail app error 0x801901f5. Here’s how to provide the required permission.

Open Settings on your system by pressing Windows + I shortcut key.
Click on Privacy & security option present at the left panel of the screen.
In the following window, choose Email option present under App permissions.
Enable the toggle present next to Email access.
Enable the toggle present next to Let apps access your email and Mail and Calendar.

That’s it. Now reboot your system, and check if the problem is fixed or not. If not, try the next solution.

Read: Fix Windows Mail app error codes 0x8000000b, 0x8007042b, 0x80040154, 0x8000ffff, 0x8007000d, 0x80c8043e, 0x80070435, 0x8007006d, 0x80070425.

3] Clear Microsoft Store cache

The next effective solution you can try in the situation is to clear the Microsoft Store cache. Here’s how to do it.

Open the Command Prompt in administrator mode.
Type wsreset.exe and press the enter key.
Wait until the command is executed.
Once done, Microsoft Store will popup automatically.

Alternatively, you can open the Start menu, type wsreset.exe, and press the enter key to clear Microsoft Store cache.

Read: F ix Error 0x80070490 in Mail app on Windows

4] Repair or Reset the Windows Mail App

There can be an ongoing issue with the Mail app which is causing the error in the question. You can use the built-in Repair feature to get rid of any minor bug causing the problem. Here’s how to do it.

Open Settings on your system.
Navigate to Apps > Apps & features.
Locate Mail and Calendar, click on the three-dots present next to it, and choose Advanced option.
In the following window, click on the Repair option.

Wait until the Repair process is complete. Once done, check if the problem continues. If yes, you will have to reset the Mail and Calendar app. You can do so by clicking on the Reset option present under the same window.

5] Uninstall and Reinstall Mail app

If none of the steps were helpful, you can uninstall the Mail app followed by reinstalling it. Here are the steps to do it.

Open Windows PowerShell in administrator mode.

Copy-paste the following command and press the enter key to uninstall the Mail app.

Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online

Wait until the command is executed.

Once done, reinstall the Mail and Calendar app on your system.

That’s it. Now login with your email account, and you will notice that you are no longer facing the problem.

How do I fix errors in the Mail app?

Depending on the cause, there are different ways to fix errors in the Mail app. But before trying anything technical, you should check the connectivity to your email server. Windows Firewall can be the main reason behind the issue; thus, allow the Mail and Calendar as through Windows Firewall. Along with these, you can re-add your account, change the advanced mailbox settings, and check privacy settings.