Emails stuck in Outbox of Mail app on Windows 11/10

Yous have multiple email accounts set in the Mail app on Windows 11/10 but yous detect that when you try to ship an email from ane of the e-mail accounts, the email gets stuck in Outbox, whereas, yous're able to send the same electronic mail using other email accounts via the same Postal service app. In some cases though, it appears all the other email accounts are affected. This post volition help you with solutions to resolve this anomaly.

Mails stuck in Outbox in Mail app

Emails stuck in Outbox of Mail app

If yous're faced with this effect, you tin try our recommended solutions below in no particular order and run across if that helps to resolve the issue.

Apply a different email client
Run Windows Store Apps Troubleshooter
Reset Mail app
Re-register Mail app with PowerShell
Allow Post and Calendar app through Windows Firewall
Update Mail and Calendar app
Update Windows 10
Configure device to allow access to e-mail
Adjust the ports used in the Postal service app
Delete electronic mail account and re-add account

Let's have a await at the clarification of the process involved apropos each of the listed solutions.

1] Use a different email client

You tin can try sending the email using another e-mail customer for Windows x.

2] Run Microsoft Store Apps Troubleshooter

This solution requires y'all to run the inbuilt Microsoft Shop App Troubleshooter and see if the trouble is resolved.

3] Reset Mail app

Reset Mail app

To reset the Mail app on Windows ten, exercise the post-obit:

Printing the Windows primal + I to open up Settings.
Tap or click the Apps category.
Nether theApps & features, scroll to locate or search for the Postal service and Calendar app.
Aggrandize thePostal service and Calendar app.
Open Advanced options.
Scroll downward and click on theReset button.
Open the Mail app, sign in with your credentials and ship the emails.

If the issue persists, try the next solution.

four] Re-register Mail service app with PowerShell

To re-register the Mail app using PowerShell in Windows 10, practice the post-obit:

Printing Windows fundamental + Ten to open the Power User Carte du jour.
Tap A on the keyboard to launch PowerShell in admin/elevated mode.
In the PowerShell console, type or copy and paste in the command below and hit Enter:

Become-AppxPackage Microsoft.windowscommunicationsapps | Remove-AppxPackage

After the command executes, restart your PC.

On kicking, burn down up the Mail service app and try sending emails and meet if the result is resolved. If non, continue with the next solution.

5] Allow Mail and Calendar app through Windows Firewall

To allow the Postal service and Agenda app through the Windows Firewall on Windows 10, practise the following:

Press Windows key on the keyboard and type allow apps.
Select Let an app through Windows Firewall from the search result.
Click on theChange settings button. You'll need administrative permission to admission settings.
Scroll downwardly and confirm thatPost and Calendar can freely communicate through Firewall. Brand sure bothPublic and Individual networks are enabled.
Ostend changes if needed.
Click OK.

Yous can now exit the Immune applications applet.

Additionally, if you have 3rd-party security software that includes an active firewall, make sure to allow the Mail and Calendar app through.

At present, check if mails even so get stuck in the Outbox when you send an email. If so, continue with the next solution.

vi] Update Mail and Calendar app

This solution entails that yous update the Mail and Calendar app on Microsoft Store. Here's how:

Open Microsoft Store.
Click on your Contour on the elevation right of Microsoft Store.
SelectDownload and Updates
ClickBank check for updatesto see if any update is available for Mail & Calendar app.

If the effect persists, try the next solution.

7] Update Windows 10

Windows updates on Windows 10 cover everything. As well the common security patches and various fixes for the Os, updates tin can also be bachelor for all built-in applications. So yous need to manually cheque for Windows update and install the new $.25 if whatever and see if the Mail app issue is resolved. Otherwise, endeavor the next solution.

8] Configure the device to allow access to the email

Allow access to email on this device

Practise the following:

Open Settings.
Tap or click the Privacy category.
Curlicue downward on the left pane to locate and select Email.
Under thePermit admission to email on this device section, click Change and ostend that the option is toggled On.
Under the Choose which apps can admission your email section, make sure that the Mail service and Agenda app is toggled On.

Go out the Settings app when washed and see if the effect is resolved. If non, try the adjacent solution.

9] Accommodate the ports used in the Mail service app

Adjust the ports used in the Mail app

Do the following:

Open Mail app.
Right-click the problematic account.
Select Account settings from the menu.
From the Business relationship settings dialog, selectChange mailbox sync settings.
Ringlet down to the bottom of the dialog and select Avant-garde mailbox settings to display the incoming and outgoing email servers.

Incoming email server: You lot can get this information from your ISP or ambassador. Usually, an incoming mail server address is in the format ofpost.contoso.com orimap.google.com. For many electronic mail accounts, yous can notice this data in the Popular and IMAP server name reference provided past Microsoft.

Outgoing (SMTP) email server: You lot tin can get this data from your Internet service provider or administrator. Usually, an outgoing email server address is in the format ofmail service.contoso.com orsmtp.contoso.com.

The servers are set up to apply the server proper noun ( mail.contoso.com) followed by a colon (:) and so the port number followed by some other colon and then another number (usually 1). If the server proper noun is valid, y'all will only want to alter the number between the two colons.

Note: This can be done for accounts that use POP3 of IMAP for incoming email and SMTP for outgoing email. You may need to contact your e-mail provider to determine what ports they support for POP3/IMAP and SMTP.