1. Verify Mail Server Settings
Go to File → Account Settings → Account Settings, select your account, and click Change. Make sure:
- Incoming Mail (IMAP or POP): e.g., imap.yourdomain.com or pop.yourdomain.com
- Outgoing Mail (SMTP): e.g., smtp.yourdomain.com
- Check with your email provider for the correct details.
2. Test Account Settings
Click the Test Account Settings button to verify server connection and login credentials. This will help pinpoint where the error lies.
3. Use Correct Port Numbers
In More Settings → Advanced Tab:
- IMAP: Port 993 (SSL)
- POP3: Port 995 (SSL)
- SMTP: Port 587 (TLS)
Adjust according to your provider's latest settings.
4. Check Your Network
- Restart your router and switch to a reliable connection.
- Avoid using VPNs or proxies temporarily to rule out blocking.
5. Disable Security Software Temporarily
Firewalls or antivirus programs can interfere:
- Turn them off briefly and check if Outlook works.
- If it helps, whitelist Outlook in the security software.
6. Repair Outlook Profile
- Go to Control Panel → Mail → Show Profiles.
- Create a new profile and re-add your account for a clean setup.