The user tries to start Outlook Express or attempts to send an email, and the following error message appears:

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: ‘nombredeldominio.tld’, Server: ‘nombredeldominio.tld’, Protocol: POP3, Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F

 

Solution: 

This problem can be solved in several ways; just follow the steps below.

  • Check your Outlook Express settings to ensure your POP3 and SMTP settings are correct.
  • Compact your email folders in Outlook Express by selecting “File -> Folders -> Compact All Folders”.
  • If you have several hundred messages in your Inbox or Outbox, move them to other subfolders.
  • Delete the contents of “Deleted Items” using the “Empty Deleted Items” option.
  • Restart your computer and try again. If the problem persists, consider deleting and recreating the email account in Outlook Express.
  • If you’re still encountering the same problem, Outlook Express may be corrupted.
  • If you haven’t resolved your issue and are using a Symantec Security Systems product, visit their website to adjust your settings.
  • If you have Norton Internet Security or Norton Personal Firewall, you’ll need to update your settings as outlined on the Norton website.