With in that page we need an option to draft the Reply of the enquiry.
Reply will only works if a checkbox “send to candidate” (a checkbox default check) is checked. If checkbox is unchecked then the comment / reply saves as comment against the enquiry.
This enquiry will also have status like Open, Pending, Closed etc.
Do let me know if you have any questions on this. Please do this on staging site first to avoid spam replies to actual emails.