Dear @Wilson, Daniel,
Thank you for reaching out to the Q&A forum and regarding the issue of emails being stuck in your Outlook outbox. You mentioned that your emails were sending successfully earlier in the day but have since stopped and are now stuck. Common cause of email stuck in Outlook could be: Large attachment, work offline, misconfigured mail server settings, external program or add-in interfere.
To help resolve this issue, we recommend the following troubleshooting solutions:
- Check Network Connection & Outlook Status
- Ensure your internet is working.
- Verify Outlook is not in Offline mode (check the status bar).
- Toggle Work Offline off via the Send/Receive tab.
- If internet is fine but emails still won’t send, the mail server may be temporarily down.
- Remove or Re-send Large Attachments
- Switch Outlook to Offline mode.
- Go to the Outbox and:
- Delete the large email.
- Or move it to Drafts, reduce the attachment size, and re-send.
- Consider using cloud links instead of large attachments.
- Delete the large email.
- Reopen and Re-send “Read” Messages
- Emails opened in Outbox are marked as “read” and won’t send.
- Move them to Drafts, open, and click Send again.
- Verify Email Account Password
- If you changed your email password, update it in Outlook:
- Go to File > Account Settings > Email Accounts.
- Select your account and click Change to enter the new password.
- Test by logging into webmail to confirm credentials.
- Go to File > Account Settings > Email Accounts.
- Check SMTP Server Settings
- Open Account Settings and verify:
- Correct SMTP server address.
- Correct port number (e.g., 587 for TLS, 465 for SSL).
- Authentication is enabled for outgoing server.
- SPA is only enabled if required by your provider.
- Click Next to test settings or try sending again.
- Authentication is enabled for outgoing server.
- Correct port number (e.g., 587 for TLS, 465 for SSL).
- Correct SMTP server address.
- Set a Default Email Account
- Go to File > Account Settings > Email tab.
- Ensure one account is marked as default.
- If none is set, select your primary account and click Set as Default.
- Restart Outlook (and Possibly Your Computer)
- Fully close Outlook and relaunch it.
- If Outlook is frozen, use Task Manager to end the process.
- A restart often clears stuck send/receive operations.
- Check for External Program Interference
- Run Outlook in Safe Mode (hold Ctrl while launching) to disable add-ins.
- If emails send in Safe Mode, an add-in may be causing the issue.
- For error codes like 0x80040119 or 0x80040600, run ScanPST.exe to repair corrupted data files.
- Temporarily Disable Antivirus Email Scanning
- Turn off email scanning in your antivirus software.
- Try sending the stuck emails again.
- Real-time protection remains active, so this is safe for troubleshooting.
- Re-enable scanning afterward or consult your antivirus vendor for compatibility fixes.
- Verify Mailbox Storage Limits
- Check if your mailbox is near or over its quota (especially for Exchange or Outlook.com).
- Delete or archive old emails to free up space.
- Retry sending once space is available.
I hope you find this message helpful. If the issue persists after these steps, please let us know any error messages you’ve received or recent changes to your Outlook setup. We’re here to assist you further.
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