Set a customer or organisation to not receive email notifications

Good Afternoon to the Community. 

Is it possible to set a customer or organisation to not receive email notifications. When dealing with other organisations that are also using ticketing systems it is easier to turn off the notifications for some customers / organisations / domains so that email storms are not generated by the systems continuously flinging emails back and forth.. 

I can't see anywhere to do this in servicecamp? 

Kind Regards, 

Adam

GGIT