您在Windows 11/10邮件应用程序^{(Mail app)}中设置了多个电子邮件帐户，但您注意到当您尝试从其中一个电子邮件帐户发送电子邮件时，电子邮件卡在发件箱^(Outbox)中，而您可以发送通过同一邮件^(Mail)应用程序使用其他电子邮件帐户的同一电子邮件。但在某些情况下，似乎所有其他电子邮件帐户都受到了影响。这篇文章将帮助您找到解决此异常的解决方案。

邮件卡在邮件应用程序的发件箱中

如果您遇到此问题，您可以尝试以下我们推荐的解决方案（不分先后顺序），看看是否有助于解决问题。

1. 使用不同的电子邮件客户端
2. 运行 Windows 应用商店应用疑难解答^{(Run Windows Store Apps Troubleshooter)}
3. 重置邮件应用
4. 使用PowerShell^(PowerShell)重新注册邮件^(Mail)应用程序
5. 允许邮件^{(Allow Mail)}和日历^(Calendar)应用程序通过Windows 防火墙^{(Windows Firewall)}
6. 更新邮件和日历应用
7. 更新 Windows 10
8. 配置设备以允许访问电子邮件
9. 调整邮件^(Mail)应用程序中使用的端口
10. 删除^(Delete)电子邮件帐户并重新添加帐户

让我们看一下关于列出的每个解决方案所涉及的过程的描述。

1]使用不同的电子邮件客户端

您可以尝试使用其他适用于 Windows 10 的电子邮件客户端^{(email client for Windows 10)}发送电子邮件。

2]运行Microsoft Store Apps疑难解答^{(Run Microsoft Store Apps Troubleshooter)}

此解决方案要求您 运行内置的 Microsoft Store 应用程序疑难解答^{(run the inbuilt Microsoft Store App Troubleshooter)} 并查看问题是否已解决。

3]重置邮件应用程序

要在 Windows 10 上重置邮件应用程序^{(reset the Mail app)}，请执行以下操作：

• 按 Windows 键 + I打开设置^{(open Settings)}。
• 点击或单击应用程序^{(Apps )}类别。
• 在 应用程序和功能^{(Apps & features)}下，滚动以查找或搜索邮件和日历^{(Mail and Calendar)} 应用程序。
• 展开 邮件和日历^{(Mail and Calendar)}应用。
• 打开高级选项^{(Advanced options)}。
• 向下滚动并单击 重置^(Reset) 按钮。
• 打开邮件^(Mail)应用程序，使用您的凭据登录并发送电子邮件。

如果问题仍然存在，请尝试下一个解决方案。

4] 使用PowerShell^(PowerShell)重新注册邮件^(Mail)应用程序

要在 Windows 10 中使用 PowerShell 重新注册邮件应用程序^{(re-register the Mail app using PowerShell)}，请执行以下操作：

• 按Windows key + X打开高级用户菜单。
• 点击键盘上的A以在管理员/提升模式下启动 PowerShell 。^{(launch PowerShell)}
• 在PowerShell控制台中，键入或复制并粘贴以下命令，然后按 Enter^(Enter)：

Get-AppxPackage Microsoft.windowscommunicationsapps | Remove-AppxPackage

• 命令执行后，重新启动您的PC。

启动时，启动邮件^(Mail)应用程序并尝试发送电子邮件，看看问题是否已解决。如果没有，请继续下一个解决方案。

5]允许邮件^{(Allow Mail)}和日历^(Calendar)应用程序通过Windows防火墙^{(Windows Firewall)}

要允许邮件和日历应用程序通过^{(allow the Mail and Calendar app through the Windows Firewall)}Windows 10 上的 Windows 防火墙，请执行以下操作：

• 按键盘上的Windows键并键入allow apps。
• 从搜索结果中选择允许应用程序通过 Windows 防火墙。^{(Allow an app through Windows Firewall )}
• 单击 更改设置^{(Change settings)}按钮。您需要管理权限才能访问设置。
• 向下滚动并确认 邮件和日历^{(Mail and Calendar)} 可以通过防火墙^(Firewall)自由通信。确保^(Make)启用公共网络和 专用^{(Public and Private)} 网络。
• 如果需要，请确认更改。
• 单击确定。

您现在可以退出允许^(Allowed)的应用程序小程序。

此外，如果您拥有包含活动防火墙的第三方安全软件，请确保允许邮件^(Mail)和日历^(Calendar)应用程序通过。

现在，检查发送电子邮件时邮件是否仍然卡在发件箱^(Outbox)中。如果是这样，请继续下一个解决方案。

6]更新邮件和日历应用程序

此解决方案需要您 更新 Microsoft Store 上的邮件和日历应用程序。就是这样：

• 打开微软商店。
• 单击^(Click)Microsoft Store右上角的个人资料。
• 选择 下载和更新^{(Download and Updates)}
• 单击 检查更新 ^{(Check for updates )}以查看邮件^(Mail)和日历^(Calendar)应用程序是否有可用的更新。

如果问题仍然存在，请尝试下一个解决方案。

7]更新Windows 10

^(Windows)Windows 10上的^{(Windows 10)}Windows更新涵盖了所有内容。除了针对操作系统的常见安全补丁和各种修复程序之外，还可以为所有内置应用程序提供更新。因此，您需要 手动检查 Windows 更新^{(manually check for Windows update)}并安装新位（如果有）并查看邮件^(Mail)应用程序问题是否已解决。否则，请尝试下一个解决方案。

8]配置^(Configure)设备以允许访问电子邮件

请执行下列操作：

• 打开设置。
• 点击或单击隐私^{(Privacy )}类别。
• ^(Scroll)在左侧窗格中向下滚动以找到并选择电子邮件^(Email)。
• 在 允许访问此设备上的电子邮件^{(Allow access to email on this device )}部分下，单击更改^(Change)并确认该选项已打开。
• 在选择哪些应用程序可以访问您的电子邮件^{(Choose which apps can access your email )}部分下，确保邮件和日历应用程序^{(Mail and Calendar app)}已打开。

完成后退出设置^(Settings)应用程序，看看问题是否已解决。如果没有，请尝试下一个解决方案。

9]调整^(Adjust)邮件^(Mail)应用程序中使用的端口

请执行下列操作：

• 打开邮件应用程序。
• 右键单击^{(Right-click)}有问题的帐户。
• 从菜单中选择帐户设置。^{(Account settings)}
• 从帐户^(Account)设置对话框中，选择 更改邮箱同步设置^{(Change mailbox sync settings)}。
• 向下滚动^(Scroll)到对话框底部并选择高级邮箱设置^{(Advanced mailbox settings)} 以显示传入和传出电子邮件服务器。

接收电子邮件服务器：^{(Incoming email server:)} 您可以从您的ISP或管理员处获取此信息。通常，传入邮件服务器地址的格式为 mail.contoso.com 或 imap.google.com。对于许多电子邮件帐户，您可以在Microsoft 提供的POP 和 IMAP 服务器名称参考^{(POP and IMAP server name reference)}中找到此信息。

传出 (SMTP) 电子邮件服务器：^{(Outgoing (SMTP) email server:)} 您可以从ISP或管理员处获取此信息。通常，传出电子邮件服务器地址的格式为 mail.contoso.com 或 smtp.contoso.com。

服务器设置为使用服务器名称 (^{(The servers are set up to use the server name ()} mail.contoso.com)，后跟冒号 (:)，然后是端口号，后跟另一个冒号，然后是另一个数字（通常为 1）。如果服务器名称有效，您只需更改两个冒号之间的数字。

注意^(Note)：这可以用于使用IMAP的^(IMAP)POP3接收电子邮件和使用SMTP发送电子邮件的帐户。您可能需要联系您的电子邮件提供商以确定他们支持POP3/IMAP和SMTP的端口。 

10]删除^(Delete)电子邮件帐户并重新添加帐户

要从remove/delete an email account from the Mail app并重新添加该帐户，请执行以下操作：

• 打开邮件应用程序。
• 右键单击^{(Right-click)}有问题的帐户。
• 从菜单中选择帐户设置。^{(Account settings)}
• 从“帐户设置”^{(Account Settings)}对话框中，选择“删除帐户^{(Delete account)}” 。

删除帐户后，您现在可以将帐户重新添加到邮件应用程序。

完成后，您可以尝试从该帐户发送邮件，而不会让邮件卡在“发件箱^(Outbox)”问题中。

这些解决方案中的任何一个都应该适合您！

相关帖子^{(Related posts)}：

1. Windows Mail 应用程序不发送或接收电子邮件
2. 电子邮件卡在 Gmail 的发件箱中^{(Email is stuck in the Outbox of Gmail)}
3. Outlook.com 未接收或发送电子邮件^{(Outlook.com is not receiving or sending emails)}
4. 电子邮件卡在 Microsoft Outlook 的发件箱中^{(Emails are stuck in the Outbox of Microsoft Outlook)}
5. Outlook 电子邮件卡在发件箱中，直到您手动发送 - 注册表修复。

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

Υou havе multiple еmail accounts set up in the Mail app on Windows 11/10 but you notice that when you try to send an email from one of the email accounts, the email gets stuck in Outbox, whereas, you’re able to send the same email using other email accounts via the same Mail app. In some cases though, it appears all the other email accounts are affected. This post will help you with solutions to resolve this anomaly.

Emails stuck in Outbox of Mail app

If you’re faced with this issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

1. Use a different email client
2. Run Windows Store Apps Troubleshooter
3. Reset Mail app
4. Re-register Mail app with PowerShell
5. Allow Mail and Calendar app through Windows Firewall
6. Update Mail and Calendar app
7. Update Windows 10
8. Configure device to allow access to email
9. Adjust the ports used in the Mail app
10. Delete email account and re-add account

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Use a different email client

You can try sending the email using another email client for Windows 10.

2] Run Microsoft Store Apps Troubleshooter

This solution requires you to run the inbuilt Microsoft Store App Troubleshooter and see if the problem is resolved.

3] Reset Mail app

To reset the Mail app on Windows 10, do the following:

• Press the Windows key + I to open Settings.
• Tap or click the Apps category.
• Under the Apps & features, scroll to locate or search for the Mail and Calendar app.
• Expand the Mail and Calendar app.
• Open Advanced options.
• Scroll down and click on the Reset button.
• Open the Mail app, sign in with your credentials and send the emails.

If the issue persists, try the next solution.

4] Re-register Mail app with PowerShell

To re-register the Mail app using PowerShell in Windows 10, do the following:

• Press Windows key + X to open the Power User Menu.
• 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:

Get-AppxPackage Microsoft.windowscommunicationsapps | Remove-AppxPackage

• After the command executes, restart your PC.

On boot, fire up the Mail app and try sending emails and see if the issue is resolved. If not, proceed with the next solution.

5] Allow Mail and Calendar app through Windows Firewall

To allow the Mail and Calendar app through the Windows Firewall on Windows 10, do the following:

• Press Windows key on the keyboard and type allow apps.
• Select Allow an app through Windows Firewall from the search result.
• Click on the Change settings button. You’ll need administrative permission to access settings.
• Scroll down and confirm that Mail and Calendar can freely communicate through Firewall. Make sure both Public and Private networks are enabled.
• Confirm changes if needed.
• Click OK.

You can now exit the Allowed applications applet.

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

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

6] Update Mail and Calendar app

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

• Open Microsoft Store.
• Click on your Profile on the top right of Microsoft Store.
• Select Download and Updates
• Click Check for updates to see if any update is available for Mail & Calendar app.

If the issue persists, try the next solution.

7] Update Windows 10

Windows updates on Windows 10 cover everything. Besides the common security patches and various fixes for the OS, updates can also be available for all built-in applications. So you need to manually check for Windows update and install the new bits if any and see if the Mail app issue is resolved. Otherwise, try the next solution.

8] Configure the device to allow access to the email

Do the following:

• Open Settings.
• Tap or click the Privacy category.
• Scroll down on the left pane to locate and select Email.
• Under the Allow access to email on this device section, click Change and confirm that the option is toggled On.
• Under the Choose which apps can access your email section, make sure that the Mail and Calendar app is toggled On.

Exit the Settings app when done and see if the issue is resolved. If not, try the next solution.

9] 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 Account settings dialog, select Change mailbox sync settings.
• Scroll down to the bottom of the dialog and select Advanced mailbox settings to display the incoming and outgoing email servers.

Incoming email server: You can get this information from your ISP or administrator. Usually, an incoming mail server address is in the format of mail.contoso.com or imap.google.com. For many email accounts, you can find this information in the POP and IMAP server name reference provided by Microsoft.

Outgoing (SMTP) email server: You can get this information from your ISP or administrator. Usually, an outgoing email server address is in the format of mail.contoso.com or smtp.contoso.com.

The servers are set up to use the server name (mail.contoso.com) followed by a colon (:) and then the port number followed by another colon and then another number (usually 1).  If the server name is valid, you will only want to change 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 email provider to determine what ports they support for POP3/IMAP and SMTP. 

10] Delete email account and re-add account

To remove/delete an email account from the Mail app and re-add the account, do the following:

• Open Mail app.
• Right-click the problematic account.
• Select Account settings from the menu.
• From the Account Settings dialog, select Delete account.

After you delete the account, you can now re-add the account to the Mail app.

When done, you can try sending mails from the account without having the mail stuck in the Outbox issue.

Any of these solutions should work for you!

Related posts:

1. Windows Mail app not sending or receiving emails
2. Email is stuck in the Outbox of Gmail
3. Outlook.com is not receiving or sending emails
4. Emails are stuck in the Outbox of Microsoft Outlook
5. Outlook Email stuck in Outbox until you manually send it – Registry fix.

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