set override address not working

We are using EBS version 12.1.3

Currently we have disabled the workflow notification mailer in developement and test instance so that all the workflow notification won't sent to every one set in the workflow steps. I understand that there is set override address functionality that I can use to forward all the email to a particular person who wants to test. So, what I did was, I cleared the workflow notification mailer queue and turned on the notification mailer in both development and test instance. I did go to set override address and put in my email address. I was suppose to receive an email and