1. Check Your Network Connection
A slow or unstable internet connection could be the main cause:
- Ensure you have a stable and fast internet connection.
- If using Wi-Fi, try switching to a wired connection for more stability.
2. Verify Email Account Settings
Ensure that your IMAP/SMTP settings are correct:
- Open Outlook → File → Account Settings → Account Settings.
- Double-check your incoming and outgoing mail server settings against your email provider’s configuration.
3. Update Passwords and Authentication Settings
If your email account password has changed, update it in Outlook:
- Go to Control Panel → Mail → Email Accounts, and select your email account.
- Click Change, update the password and authentication settings, and click Next.
4. Disable Antivirus or Firewall Temporarily
Antivirus or firewall software could be blocking Outlook’s connection to the server:
- Temporarily disable your security software and check if the issue resolves.
- If this works, add Outlook to your security software’s exceptions list.
5. Create a New Outlook Profile
A corrupt profile could be the root cause of this error:
- Go to Control Panel → Mail → Show Profiles.
- Click Add to create a new profile and set it as the default.
6. Check for Server-Side Issues
Sometimes the issue may be with your email provider’s server:
- Verify if your email provider is experiencing downtime by checking their status page or contacting their support team.
7. Repair or Reinstall Outlook
If none of the above fixes work, repairing or reinstalling Outlook may help:
- Go to Control Panel → Programs → Programs and Features.
- Right-click on Microsoft Office and choose Change, then select Repair.