When an Account is created, its INBOX Mailbox is automatically created. The System and/or Domain Administrator can specify additional Mailboxes to be created at that time.
Mailboxes can be "nested": for any Mailbox "A" you can create a sub-Mailbox "B" - in the same way as you can created a file directory inside some other file directory. The CommuniGate Pro Server uses the slash (/) symbol as the hierarchy separator: INBOX/important is the name of the sub-Mailbox important "inside" the INBOX Mailbox.
CommuniGate Pro allows you to store messages in some Mailbox X and at the same time you can create sub-Mailboxes X/Y, X/Z for that Mailbox. This feature is implemented by providing two "invisible" Mailbox entities - one for storing messages, one - for serving as a "directory" for the nested Mailboxes. The "directory" entity is created automatically, as soon as you try to create the first sub-Mailbox. You can, though, create the "directory" entity without creating the "mail storage" entity: use the ABCDEF/ name as the new Mailbox name to create only the directory entity with the ABCDEF name. The name ABCDEF will be listed, but will not be "selectable" - and you will not be able to store messages in the ABCDEF Mailbox. You can later create the regular ABCDEF Mailbox and the "storage" entity for your ABCDEF Mailbox name will be added.
It is impossible to delete the INBOX Mailbox. You can rename the INBOX Mailbox, though. In this case a new empty INBOX Mailbox will be created automatically.
Mailbox names are case-sensitive. Some file systems (NTFS, for example) provide case-insensitive file naming conventions. When these file systems are used for CommuniGate Pro Account/Mailbox storage, the Mailbox names are still case-sensitive, but you cannot create two Mailboxes with names that differ in case only. The INBOX Mailbox name is an exception: it is always a case-insensitive name.