Is there a way to have emails on in a test zone but not send emails out to Candidates?

Summary: We've run into an issue with testing in a masked zones. In some cases we have to test with un-masked data. The difficulty is that in the un-masked zones we have the risk of sending emails out to candidates by mistake. For example the Auto-generated emails for disposition from requisitions and the emails for accepting offers. We've had candidates receive these from our dev environment by mistake during a round of testing

I worked with the security team and we updated the test email in the BPM worklist to be my work email. All the approval emails went to my email but the candidate emails still were sent out.