Email | Updated January 2026
Quick Answer
This error typically means Outlook lost its connection to the mail server mid-session. Check that your incoming and outgoing server settings match mail.yourdomain.com, your username is your full email address, and your ports are correct (POP3: 995 with SSL, IMAP: 993 with SSL, SMTP: 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.
