1. A method for producing a folder list file for transmission to a client, the method comprising: querying a folder database for information associated with a root folder in response to a received request for a folder list file, the received request comprising a folder identifier associated with the root folder, the information associated with the root folder comprising an access control list for the root folder; adding the information associated with the root folder to the folder list file; and querying the folder database for information associated with a set of subfolders of the root folder, the information associated with the set of subfolders of the root folder comprising an access control list associated with each subfolder.