[Dovecot] How to have a "public" readonly folder?

I searched the website and the mailing list and had difficulty finding an answer.

I have my email users who are using dovecot-1.0.beta2.

I also have setup a dummy account to get the Linux Kernel Mailing List (LKML) traffic.

I would like to have it so that my IMAP users (maybe POP3 but don't need that) be able to read the LKML mailing list from that email account.

I can put the email into an mbox or a maildir for the LKML mail.

I have played around with the namespace and public option and I can't get it to work :(

I tried this:

namespace public { separator = / prefix = Public/ location = maildir:/home/virtemail/lkml/ }

In my email client (Mozilla Thunderbird 1.5), I am unable to view the Public folder. If I select subscribe, I can see the Public folder but it is grayed out.

Any ideas?

Thanks, John