[Dovecot] ACLs - creating new top level folders

[rog7993 at web.de]

Hello,

Am 22.05.2013 18:35, schrieb Timo Sirainen:
> With v2.2.2: http://hg.dovecot.org/dovecot-2.2/rev/714dfc072d60
>
> Doesn't work for public namespaces though.

Thanks for this hint. It seems I should upgrade our server in near future.

Public namespaces do not have this problem. While I was looking for a 
solution for my problem, I also played with them instead of a shared 
namespace. With this config snippet:

namespace public {
    separator = /
    prefix = "Shared\ Folders/"
    location = 
maildir:/home/mail01/shared/Maildir:INDEX=/srv/dovecot/index/shared:CONTROL=/srv/dovecot/control/shared
    subscriptions = no
    list = children
}

This leads to this folder layout:

/home/mail01/shared/Maildir/.project1/cur
/home/mail01/shared/Maildir/.project1/new
/home/mail01/shared/Maildir/.project1/tmp
/home/mail01/shared/Maildir/.project1/dovecot-acl

/home/mail01/shared/Maildir/.project1.bbbb/cur
/home/mail01/shared/Maildir/.project1.bbbb/new
/home/mail01/shared/Maildir/.project1.bbbb/tmp
/home/mail01/shared/Maildir/.project1.bbbb/dovecot-acl
/home/mail01/shared/Maildir/.project1.bbbb/maildirfolder

/home/mail01/shared/Maildir/.project1.jjjjj/cur
/home/mail01/shared/Maildir/.project1.jjjjj/new
/home/mail01/shared/Maildir/.project1.jjjjj/tmp
/home/mail01/shared/Maildir/.project1.jjjjj/dovecot-acl
/home/mail01/shared/Maildir/.project1.jjjjj/maildirfolder

Now I have a parent folder, where I can place the dovecot-acl file:

/home/mail01/shared/Maildir/.project1/

Probably because this folder is not handled as INBOX like with private 
and shared namespaces. It would be a little tricky to put new mail in 
these kind of folders with Dovecot LDA. But it could be done. The next 
question would be, where to put sieve scripts? The main reason, why I 
don't like this solution, is the fear, that this can be problematic from 
a performance view. Access permissions of public namespaces are not 
listed in the file "shared-mailboxes". What if the folder 
"/home/mail01/shared/Maildir" contains some thousand subfolders? Is this 
a problem, because every imap process have to open all dovecot-acl files 
in these directories?

Ingo Rogalsky