How to test CORS with Mule

I am using Anypoint Studio 6.1 and Mule 3.8.1 and have a mule RESTful application that I want to stop CORS requests from being accepted by the application.

The application has been setup to do this but what is the best way to prove this is working?

From what I have read so far, the examples build their own application and I would just like to do something like send a request configured as a CORS request in Postman. How can I do this?

Thanks