Email | Updated 2026
Quick Answer
This error occurs when 'Log on using Secure Password Authentication (SPA)' is checked in your Outlook account settings. Our servers do not use SPA. Go to Account Settings > More Settings > Security, and uncheck 'Always use Secure Password Authentication.' Your username should be your full email address.
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.
