How to Reinstall Mail in Windows 11

If the Mail app is missing, won’t open, or keeps failing to sync, you can remove and reinstall it through Windows settings or the Microsoft Store. Before starting, make sure you know your email address and password; removing the app can remove locally stored app data, though your messages normally remain with your email provider.

What You’ll Need

An internet connection to download the replacement app.
Access to a Windows account with permission to install or remove apps. Some work or school PCs are managed by an administrator.
Your email address and password, plus any required sign-in verification method. Check that you can sign in through your provider’s website before removing the app.
A few minutes to reinstall the app and add your account again.

Step-by-Step

Check which mail app you have. Open Start and search for Mail. Windows 11’s older Mail and Calendar app has been replaced by the new Outlook for Windows on supported systems. If Mail opens and offers a switch to Outlook, follow the on-screen option if you want to move to the replacement rather than reinstall the legacy app. The Microsoft Store may no longer offer the old Mail and Calendar app for a fresh install.
Confirm your email account works elsewhere. In a browser, visit your email provider’s normal sign-in page and make sure you can access your inbox. This verifies your password and checks that messages are available online. If you use a work or school account, confirm that you can complete any organization-required sign-in or verification steps.
Try repairing the app before removing it. Open Settings > Apps > Installed apps. Find Outlook (new), Mail and Calendar, or the mail app you use. Select the three-dot menu beside it, choose Advanced options if available, then select Repair. Repair attempts to fix the installation without removing its data. Open the app and test it. If it still fails, return to Advanced options and choose Reset only if you are ready to set up the app again; reset can erase app data stored on the PC.
Uninstall the app you intend to replace. In Settings > Apps > Installed apps, locate that app, select its three-dot menu, and choose Uninstall. Confirm if prompted. If the app is not listed, search for it from Start, right-click its result, and check whether Uninstall is available. If Windows does not offer that option, do not use unofficial removal tools or commands; use the supported Store or Windows recovery options instead.
Restart Windows. Select Start > Power > Restart. A restart clears temporary app processes and gives Windows a clean start before installation.
Install the available mail app. Open Microsoft Store from Start and search for Outlook for Windows or the mail app you removed. Check that the listing is the app you intend to install, then select Get or Install. If it shows Open instead, it is already installed. If you specifically need the old Mail and Calendar app, it may not be available for installation; use the supported new Outlook app or your provider’s webmail instead.
Open the app and add your account. Launch it from Start. In Outlook, choose Add account when prompted, enter your email address, and follow the sign-in steps. For an account already listed, use the app’s account settings to add it or sign in again. Allow any requested permissions only if you understand what they are for.
Check sending and receiving. Wait for the inbox to sync, then send a brief test message to an address you can access. Check the sent folder and confirm the reply arrives. If syncing does not start, use the troubleshooting steps below rather than removing and reinstalling repeatedly.

Common Mistakes

Removing the wrong app: Windows may have the legacy Mail and Calendar app, new Outlook, or another mail client. Read the app name in Installed apps before uninstalling.
Expecting the old app to return: Reinstalling Windows or searching the Store may not restore Mail and Calendar if it is no longer offered. The supported replacement is Outlook for Windows, or you can use webmail.
Assuming app data is the same as email: Messages stored on an email provider’s server normally remain there, but drafts, unsent messages, downloaded-only content, and settings may be lost when app data is reset or removed.
Using an untrusted download: Install through Microsoft Store or the official Windows interface. Avoid third-party installers, scripts, and unofficial app packages.
Repeatedly reinstalling without testing the account: If the password or provider sign-in is the problem, reinstalling will not fix it. Verify access in a browser first.

Tips

Write down the email address and note any special account setup requirements before removing the app. Do not save your password in an unsecured note.
Keep Windows and Microsoft Store up to date. In the Store, open Library and select Get updates if available.
If you use several accounts, add them one at a time and verify each inbox before adding the next.
For a temporary way to read email while installing, use your provider’s website in a browser. This also helps distinguish an app problem from an account or service problem.

Troubleshooting

The app does not appear in Installed apps: Search for it from Start and check the Microsoft Store Library. It may be named Outlook rather than Mail. If it is not installed and the Store does not offer the old app, install an available supported mail app or use webmail.

Microsoft Store will not download it: Check your internet connection, confirm you are signed in to the Store, and restart Windows. Open Store > Library > Get updates, then retry. If this is a work or school device, an administrator may control Store access; contact them rather than trying to bypass the restriction.

Installation or opening fails: Install available Windows updates through Settings > Windows Update, restart, and try again. If the app is listed, use Settings > Apps > Installed apps > its three-dot menu > Advanced options > Repair. Use Reset only after accounting for locally stored app data.

Your account will not sign in or sync: Recheck the address and password by signing in on the provider’s website. Complete any verification prompt, check for service notices from your provider, and make sure Windows has the correct date and time. If the app reports that the account needs attention, follow its sign-in prompt. Work or school accounts may require help from the organization’s IT support.

Frequently Asked Questions

Can I reinstall the original Mail app in Windows 11?
The legacy Mail and Calendar app may no longer be available for a new installation from Microsoft Store. If it is not listed in your Store Library, use Outlook for Windows or access your email through a browser.

Will uninstalling Mail delete my emails?
Messages stored on your provider’s server normally remain available online. Local drafts, unsent messages, downloaded-only items, and app settings may not, so check for anything important before uninstalling or resetting.

Do I need to uninstall Mail before installing Outlook?
No. You can install Outlook for Windows from Microsoft Store without first removing the legacy app. Uninstalling the old app is optional and can help if you no longer need it.

Why can’t I find an Uninstall button?
The app may be managed by your organization, or Windows may not allow that app to be removed in the usual way. Check with your administrator on a managed device; avoid unofficial removal methods.

Will reinstalling fix email sync problems?
It may help if the app installation is damaged, but it will not resolve an incorrect password, provider outage, or account restriction. Test your account in a browser and try Repair before reinstalling.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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