I get an error 0x800ccc0d or 0x800ccc0f when sending or receiving email in Outlook Express or Outlook

Symptoms

When you attempt to send or receive email, you see one of the following error messages.

- The server could not be found. (Account:account name, POPserver:'mail', Error Number: 0x800ccc0d)

- Task 'server name - Sending and Receiving' reported error (0x800ccc0f): 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP). The server responded: ? K'

- Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account. account name, Server: 'server name', Protocol: POP3, Server Response: '+OK', Port: 110, Secure(SSL): N0, Error Number: 0x800ccc0f

Assumption

You have confirmed that your email settings in Outlook or Outlook Express are correct.

Possible solution 1:

You have a firewall. The firewall may be causing this error. Configure your firewall software to grant access to the Internet for the following files.

For Outlook Express: Msimn.exe
For Outlook: Outlook.exe
By default, most e-mail clients have to have outbound access on port 110 (POP3) and inbound access on port 25 (SMTP).

Possible solution 2:

You have enabled Norton antivirus email feature. Please disable it to try again.

Possible solution 3:

Your ISP has blocked port 25 for outgoing mail. This is becoming quite common, so we also provide outgoing mail service on port 8889. If you have ruled out anti-virus or firewall interference, try changing your SMTP setting from port 25 to 8889.