In my Support space, my agents answer both internal and external customer support requests. In the current UX, my agents cannot tell by the email recipient list whether a reply all is going to internal customers or external customers. This is because only the contact name is displayed. In order to understand whether the customer is internal or external, my agents need to see the email extension (e.g. @microsoft.com). This information is important because we cater our messaging to each audience. Without visibility to whether the customer is internal or external, my agents are having to take the extra step of clicking into each contact or scrolling down into the previous emails in hopes of finding their extension before they can determine the best communication to send. Any sort of signal to the agent (hover-over, color-coding, email display) to help save the step of investigating who each recipient is will enable us to deliver a quality, customer-focused experience, while saving operational time.