[Dovecot] Shared Mailbox

[c-schettner]

Hi all,
I am a very new dovecot user and I do not have many experience in Linux 
configuration. I use dovecot v1.0.rc.15 (Debian package) IMAP service 
with virtual domains and users in /home/vmail and everything runs 
perfectly.

Now I want to share the "testfolder" under the mailbox of "user1" to all 
memebers of "example.net" but I don?t understand the wiki pages 
(http://wiki.dovecot.org/SharedMailboxes). The ACL-plugin is on in 
dovecot.conf.

my structure under /home/vmail
-example.net
--user1
---/.drafts
---/.INBOX.testfolder
---/.Sent
---/.trash
---/Cur
........
--user2
--- (dito)
-xxxx.de
--user3
--user4
-test.com
--user5
--user6

can anybody help with a configuration tip?

Many thanks,
Christian.