A shared folder is one that you allow others to access. Several level of access control are available. For example, in web mail, you can allow others Read only; Read and write; Read, write, and manage access; or None to your folder. None is the default. FIGURE 8-1 shows the “Permissions” you can set in web mail.
Read only: Allows users to only read the messages in the shared folder.
Read and write: Allows users to read and set flags on messages in the shared folder. It also allows users to delete messages and subfolders.
Read, write, and manage: Allows users to read messages, set flags (setg) on the messages in the shared folder, create subfolders under the shared folder, delete the subfolders, and share the folder with ...