POP3 Error: "Your server has unexpectedly terminated the connection".

Situation:

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

- Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account mail hub.optonline.net. Server POP3 norton. antivirus Protocol Pop 3. Port 110. Secure (SSL) No. Error. Number 0X800CCC0F.

- The TCP/IP connection was unexpectedly terminated by the server. (Account: <account name>, POP3 Server: <server name> Error Number:0x800ccc0f.

Solution:
These errors can have more then one cause. They can be caused by the following:

If you have ZoneAlarm and the "pass lock" feature is enabled, then the error can occur if ZoneAlarm has not been configured for Norton AntiVirus Agent (for NAV 2002) or ccApp.exe (for NAV 2003). If you have ZoneAlarm, then see the document Error: "Unable to initialize email protection..." when starting Norton AntiVirus with ZoneAlarm Pro Internet Lock enabled
If you are using Microsoft Outlook Express, then follow the instructions in the document Error: "0x800ccc0e, Socket Error 10061" when using Outlook Express.
This can error can be caused by a server configuration error. Read the Microsoft knowledge base article XFOR: Error Message: Your Server Has Unexpectedly Terminated the Connection, Article ID: Q278637 for more information.

Workaround
If these solutions do not fix the problem, then as a workaround, you can disable email protection by following the instructions that apply to your version of NAV:

NAV 2002/2003:
1. Start NAV, and then click Options.
2. Click Email.
3. Clear the Scan incoming Email and Scan outgoing Email check box.
4. Click OK.