Marianne, with that kind of volume of messages, I doubt that Zenbe will work for you. My chief complaint about it was that new messages aren’t highlighted. Even with the small volume we had in testing the product (a week of use) I found myself scrolling the whole flow to find out if Bobby or Evan had replied, and there is not even a tool that I saw like Chrome’s One Number extension to let you know how many new posts there were.