Connection actively refused 127.0.0.1:17001

Overview:

When you browse webmail.yourdomain.xxx you receive the following error:

No connection could be made because the target machine actively refused it 127.0.0.1:17001
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:17001

Solution:

1. Make Sure that SmarterMail Mail Service is not stopped.
2. Recycle Application Pool in IIS.