Email responses syncing to the log

When I send an email through the property via the "log", and someone responds to it, there response should go into the log, and it does not. It is sent out, and cc's the ss property email address, but if you hit reply, it goes only to the users email address, and shows "email rec" in the log, with no response. This is counterproductive if we have to go back and make notes of what the response was.