IMAP (Shared) Folder's permissions

Hi all!!

I used to "fine tun" the permissions for Shared Folders (a.k.a. Public Folders) in IMAP.

No problem with cyrus, it came with cyradm, Cyrus::IMAP, and all fit perfect for me!!

But now, with dovecot, i have no idea...

I've look for some clues within Webmail, /bin, /sbin, and i didn't find anything usefull...

Someone knows how to do that?