MailSite console error 11001- Cannot Connect to Mail Server - No such host is known

After changing the server name, the MailSite console yields the following error when trying to access it:

Cannot connect to mail server on
Error 11001
No such host is known

This occurs when the MailSite console is still trying to access the mailserver using the old server name.

To resolve this

1. Log onto the server where MailSite is actually installed
2. Open the MailSite Console
3. Right click on the non-accessible server
4. Click De-register server
5. Click Server
6. Select Register new server
7. In the Computer name field enter localhost
8. Leave the other fields empty
9. Hit OK
10. You should now be able to use the console.

Note: You can replace localhost with the new name of the computer, however should you change the name of the computer in the future you will run into the same problem. Using localhost will avoid this situation.