The CommuniGate Pro WebUser Interface provides access to user Mailboxes or "folders". You can display the list of Mailboxes in your Account, create new Mailboxes, rename and remove Mailboxes, open and view Mailbox, search Mailboxes for certain data, etc.
Mailboxes can be of a regular type - they contain E-mail messages. INBOX is a regular type Mailbox that contains all messages received by your Account.
You can also create Contacts-type (AddressBook-type) Mailboxes (folders), Notes-type Mailboxes, and (if the Calendaring Service is enabled for your Account) the Calendar-type and Tasks-type Mailboxes.