When an agent replies to a contact center email and dispositions the message it closes out the interaction, if the recipient replies with follow up questions the contact center creates a new interaction that would queue to another available agent. If there was a setting that allowed replies to route to the original agent that replied to the initial email it would allow the sender to correspond with a single agent start to finish which in the event of troubleshooting or a customer service issue leads to increased customer satisfaction with the service received.