2019 windows 10 mail outbox sends sometimes sometimes not

The occasional missing email in the Outbox can be frustrating! Let's troubleshoot this issue together.

Here are some potential causes and solutions to help you resolve the problem:

  1. Check the Outbox size limit: Windows 10 Mail has a default Outbox size limit of 10 MB. If your Outbox exceeds this limit, emails might not send. Try deleting some emails from the Outbox to free up space.
  2. Outbox folder corruption: Sometimes, the Outbox folder can become corrupted, causing emails to not send. Try moving the Outbox folder to a different location, then move it back. This might resolve the issue.
  3. Email client settings: Ensure that your email client settings are correct. Check your account settings, server settings, and authentication settings to ensure they're accurate.
  4. Network connectivity issues: If your internet connection is unstable or slow, emails might not send. Check your network connection and try restarting your router or modem.
  5. Windows 10 updates: Ensure that your Windows 10 is up-to-date, as updates often resolve issues like this.
  6. Mail app cache: Clearing the Mail app cache might resolve the issue. To do this:
    • Press the Windows key + R to open the Run dialog box.
    • Type %localappdata%\Microsoft\WindowsApps\Microsoft.WindowsMail and press Enter.
    • Delete the contents of the folder.
  7. Re-register the Mail app: Re-registering the Mail app might resolve the issue. To do this:
    • Press the Windows key + R to open the Run dialog box.
    • Type wmic path win32_product where "name='Microsoft.WindowsMail'" call uninstall and press Enter.
    • Then, type wmic path win32_product where "name='Microsoft.WindowsMail'" call install and press Enter.
  8. Reset Windows 10 Mail: If none of the above steps work, you can try resetting Windows 10 Mail. To do this:
    • Go to Settings > Apps > Apps & features.
    • Find Windows Mail in the list and click the "Modify" button.
    • Click the "Reset" button.
    • Confirm that you want to reset the app.

If none of these steps resolve the issue, you can try contacting your email provider's support team or seeking further assistance from Microsoft Support.

I hope this helps you resolve the issue with your Windows 10 Mail Outbox!