Sometimes it may be necessary to disable services such as IMAP or Exim. This is possible via WHM.
1) First, navigate to service manager in WHM. (WHM >> Service Configuration >> Service Manager)
2) From here, you can uncheck the service in question from the left-hand column to disable the service. And then from the right-hand column to stop monitoring for this service.
3) You can then scroll to the bottom and save.
For more information on service manager, see our documentation here.