The CommuniGate Pro Server allows an Account user to subscribe to some Mailboxes. The Account Mailbox subscription is a simple list of Mailbox names. This list is not used by the Server itself - the Server just stores one subscription list for each Account.
You can modify the Account subscription either via a decent IMAP mailer, or using the WebUser Interface.
You can use the Account Mailbox subscription to make some not-so-decent IMAP mailers access foreign Mailboxes: make sure that your IMAP client is configured to use the Account Mailbox subscription, and add the desired foreign Mailbox name into the subscription list.
**Note:**Some IMAP mailers tend to rebuild Account subscription lists: they empty the subscription, and then subscribe you to all Mailboxes in your own Account.
The Account Mailbox subscription is stored in the Account .info service file.