Outlook email stuck in Outbox is a common issue that frustrates many users. This issue can cause delays in sending important emails and can also result in lost communication. If you're facing this issue, don't worry, there are several solutions to fix the problem.

The first thing you should try is to restart your computer. Sometimes a simple restart can help resolve the issue. If that doesn't work, check the size of the email stuck in the Outbox. If it's too large, try reducing its size by removing attachments or splitting it into smaller parts.

Another solution is to disable any email scanning software such as antivirus or anti-spam software. These programs may interfere with the sending of emails and cause them to become stuck in the Outbox.

If the above solutions don't work, you can try using Microsoft's built-in diagnostic tool, the Inbox Repair Tool. This tool can be found in the "Scanpst.exe" file located in the Outlook program files.

In some cases, the issue may be related to your email account settings. Make sure your account settings are correct, including your email address, password, and server settings.

In conclusion, there are several solutions to fix the issue of Microsoft Outlook email stuck in Outbox. Try restarting your computer, reducing the size of the email, disabling email scanning software, using the Inbox Repair Tool, and checking your account settings. With these solutions, you should be able to resolve the issue and get your emails flowing again.