[Dovecot] Shared folders and subscriptions

[Markus Werner]

On Fri, Apr 17, 2009 at 05:43:01PM -0400, Timo Sirainen wrote:
> It would be possible to do both. The INBOX/ could be set up as a hidden
> namespace and the "" namespace would be the default one. Or is there a
> reason why you wouldn't want "" namespace to show up anything?

Crying users, because suddenly something in their clients looks "very"
different :) I have many of those.

> Or you could also see if you could create a private namespace with
> prefix="#User/" and subscriptions=yes, perhaps with
> location=maildir:/var/lib/dovecot/empty:CONTROL=~/Maildir/shared where
> the empty directory would be a world-readable non-writable empty
> directory. That namespace should then catch subscriptions to shared
> mailboxes.

I tried this. The following is logged:

Apr 18 00:12:01 asterix dovecot: IMAP(markus at example.com):
fchown(/var/spool/dovecot/users/example.com/markus/Maildir/control/shared/subscriptions.lock,
-1, 0) failed: Operation not permitted
Apr 18 00:12:01 asterix dovecot: IMAP(markus at example.com):
file_dotlock_open() failed with subscription file
/var/spool/dovecot/users/example.com/markus/Maildir/control/shared/subscriptions:
Operation not permitted