[imp] Hide IMP Namespaces

[qmail at top-consulting.net]

I'm running Horde Groupware Webmail Edition 1.2.6  with IMP 4.3.7

Our IMAP server has multiple namespaces including . ( the default one  
containing the Inbox ), INBOX. ( a clone of . for older clients ) and  
ARCHIVE. which contains the user archives.

How do I hide certain namespaces from the user's visible folders ? I  
noticed that IMP shows all folders, not just the subscribed ones,  
regardless of namespace.

I simply want to only show the folders in the . ( default ) namespace  
and nothing else.

Any clues how to do that ?