Our owner has asked us to look into being able to track delivery and response times to email internally.

This is due in part to some staff not responding to requests of other staff in a timely manner and holding up production. The owner wants it so that if an email internally is not responded to within 2 hours of its delivery that a copy of the email is forwarded to the operations manager.

I have issues with the practicality of this however that is what has been requested, any one have any ideas on how to implement this?