Statistics about incoming e-mails looks nice, but they are quite useless. Consider two users, user-1 receives 10 e-mails from news portals and wrote 1 e-mail to a person you never heard from. While user-2 receives 5 e-mails from a customer and sent 5 e-mails back. Which user do you consider more active? I am sure it’s user-2, because he communicates with your customers. Proxmox Mail Gateway advanced address statistics can show you this important information.