So I am having several issues which are getting worse as we expand the number of sites and users on our servers. We currently have 3 servers with about 3-10 sites per server and about 30-40 e-mail accounts. All of our servers are Ubuntu 10.4 with Raid 5 or Raid 1 configurations. With almost all of our accounts the number of e-mails has quickly exceeded past 3000. The e-mails are simply listed in the directory. Then we have several file uploading sites with the same issues which we are working on. The problem now is all of our servers are taxing our drives and everything is slowing down. With a linux file system it is recommended not to have more than 1000 files or folder listed per directory. With our sites this is an easy fix and files uploaded are categorized by month. However, with e-mails this is a growing problems and size limits do not easily fix this. Is there any way to have e-mails organized into folders as well?