Your business users want to know more about what is happening with the issues raised by their business unit. They gave you a list of situations in which they want to get emails, so you know which parts of the shared notification scheme they want to be added to.
You consult with the project owner.
He doesn't want any changes to the emails that go to developers and testers.
The project owner approves of the business users getting the emails, but he would like to retain control of who gets emails for his project.
How can you satisfy these requests?