Email | Updated 2026
Quick Answer
This sending error typically means SMTP authentication is not enabled or your outgoing server settings are wrong. Go to Account Settings, click More Settings > Outgoing Server, check 'My outgoing server requires authentication,' and verify the server is mail.yourdomain.com on port 465 with SSL.
For complete Outlook troubleshooting steps and all error codes, see our full guide:
Correct Email Settings
Most Outlook errors are caused by incorrect server settings. Use these values:
- Incoming/Outgoing Server -
mail.yourdomain.com - POP3 Port - 995 (SSL) or IMAP Port - 993 (SSL)
- SMTP Port - 465 (SSL)
- Username - your full email address
- Authentication - enabled for outgoing, SPA disabled
For step-by-step setup: How to Set Up Email in Microsoft Outlook
This article has been consolidated into our Common Outlook Email Errors guide for easier reference.
