One of our client need to setup an public folder for internal mail
archival. Our engineer setup one linux box (Readhat 6) and install
Cyrus 2.5.1 to enable an IMAP public folder. The customers use both
Eudora and Outlook Express 5 and 6 as a mail client. Eudora and
Outlook express can manually copy or move the message from local inbox
to the IMAP public folder. The customer tried to create a rule in
outlook in order to copy some specificed message to public IMAP
folder. But,in the rule wizard of Outlook Express, when the "copy to
specificed folder" in the Action Rule was clicked, the IMAP public
folder is not appeared. Only, local public folder are listed. So,they
can't configure the rule to copy the message to the public folder. Do
you know how to enable the IMAP public folder? The problem was
appeared only Outlook, Eudora was worked well.

On the mail client, we create 2 accounts. One for SMTP mail,this
account is used to retrive/send message from/to ISP mail server.
Another for IMAP, this is an internal account connect to the Linux
(Cyrus). The server can not be accessed from the outside of the
company.