dovecot - Jan 2011 - Rename public folders

I've got a number of public mailboxes configured for my users. We pretty
much have to use Entourage for a client, which insists on creating all new
subfolders with the name 'Untitled Folder'. When they try to rename
these
subfolders with useful names, Dovecot returns

A028 NO [CANNOT] Renaming not supported across non-private namespaces.

I guess this is because renaming a subfolder could potentially break
subscriptions for other users? Or is it a hard requirement from IMAP RFC?

If the former, is the problem merely very complicated, but eventually
fixable, or is it just intractable?

We're using Dovecot 2.0.7 from the atrpms RPM, Redhat EL 5.0. The public
mailbox namespace is configured with:

namespace {
  type = public
  prefix = Public/
  separator = /
  hidden = no
  list = yes
  inbox = no
  subscriptions = no
  location = maildir:/data/imapmail/public:LAYOUT=fs
}

-- 
John Burian
Systems Programmer
Battelle Center for Mathematical Medicine
The Research Institute At Nationwide Children's Hospital
614-355-5686
John.burian at nationwidechildrens.org


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On Thu, 2011-01-13 at 10:59 -0500, Burian, John wrote:
> A028 NO [CANNOT] Renaming not supported across non-private namespaces.
> 
> I guess this is because renaming a subfolder could potentially break
> subscriptions for other users? Or is it a hard requirement from IMAP
> RFC?
> 
> If the former, is the problem merely very complicated, but eventually
> fixable, or is it just intractable? 
Nothing prevents this from being able to work, but there are several
potential problems, which is why I haven't really even tried to do that
yet.

For example one problem is what should happen to a public mailbox ACLs
when it's renamed to your private namespace? Should they be removed or
not?

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