On Mon, May 05, 2008 at 04:28:51PM +0200, Martin Hochreiter wrote:
> ok,
> 
> I somehow managed to get the shared folders now
> (by starting the whole installation new) - but I can't
> controll the access.
> 
> Formerly I set the file permissions group based -
> 
> (shared)Maildir
> |__Folder1  rwxr-x--- owner group1
> |__Folder2  rwxr-x--- owner group2
> |__Folder3  rwxr-x--- owner group3
> 
> 
> While subscribing you could only see the Folders of
> the group you are in.
> 
> NOW its different.
> If the permission isn't e.g Folder1 rwxr-xr-x then
> nobody could see the the folders.
> And if it's set to rwxr-xr-x .. .everyone could see it
> 
> whats wrong here?

In case you've not seen it, it may be worth checking your setup in detail
against this description:
http://www.courier-mta.org/imap/README.sharedfolders.html#oldshared

Possibly relevant:

"The '-S' option to maildirmake to create a maildir that will contain shared
folders. The -S option gives group and world read permissions on the maildir
                                   ^^^^^^^^^
itself (where group/world permissions are normally not set for a regular
maildir). This allows access to any folders in the shared maildir, and
that's why you should not use this Maildir directly as your primary
mailbox."

However that applies to the top-level Maildir, not to the folders within it.

One other suggestion: try running imapd directly at the command line.

  # su - martin_hochreiter
  $ pwd   # check you are in /home/martin_hochreiter
  $ /path/to/imapd Maildir
  .. issue IMAP commands here

If you get the same "* NO Cannot open message" then you can try the same
again, but this time running imapd under strace:

  $ strace /path/to/imapd Maildir 2>strace.log

This should hopefully give you a clearer indication of exactly what file or
directory is failing to be accessed.

However if the operation is successful, then this proves the problem is to
do with setting up the user environment when doing a remote LOGIN (e.g.
perhaps the supplementary groups aren't being initialised properly)

HTH,

Brian.

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