[Dovecot] Dovecot + Vpopmail quota issues

[qmail at top-consulting.net]

I can't get dovecot to ignore a certain directory/namespace when  
calculating quotas.


I am running dovecot 1.2.16 with vpopmail configured for quotas.

I use the dot (.) as my separator and my user structure is as follows:

../domain.com/user/Maildir  for all the user directories

I also have for each user:

../domain.com/user/Maildir/Archive   which is a symlink to a NFS  
mounted partition that holds read-only archives

In dovecot.conf I have defined them as follows:


mail_location = maildir:~/Maildir

namespace private {
   separator = .
   prefix = ARCHIVE.
   inbox = no
   hidden = yes
   list = yes
   location = maildir:~/Maildir/Archive
}

namespace private {
   separator = .
   prefix =
   inbox = yes
}

This works very well, in as much as I see the Archive namespace and  
its folders.

The problem arises in the fact that Dovecot insists on calculating the  
'Archive' namespace/directory storage towards the total storage used.

My Quota configuration is as follows:

auth default {
   mechanisms = plain login digest-md5 cram-md5

   passdb vpopmail {
     args = webmail=192.168.1.12
   }

   userdb vpopmail {
     args = quota_template=quota_rule3=*:backend=%q
   }
...
}

plugin {
quota = maildir
quota_rule = ?:storage=0
quota_rule2 = Archive:ignore
quota_rule3 = ARCHIVE:ignore
}

 From what I've read, this is supposed to use the maildirsize file  
when available or otherwise return no quota. It worked just fine  
before this new Archive namespace.

For a certain user, vpopmail writes the 'maildirsize' file in  
../domain.com/user/Maildir/maildirsize and it contains the correct  
value ( without the /Archive directory ).

The problem is that for some reason, something ( I suspect dovecot )  
writes a new maildirsize file in  
../domain.com/user/Maildir/Archive/maildirsize which also contains the  
size of Archive. Subsequently, Dovecot adds the two of them up and  
usually throws me over quota.

To test, I have emptied the maildirsize file under Archive and changed  
its owner to root (perms are 755 ) so that nobody but root can write  
to it. Dovecot complained right away about it:

Jul 19 12:55:21 pop1 dovecot: IMAP(user at domain.com):  
open(/home/vpopmail/domains/B/domain.com/user/Maildir/Archive/maildirsize)  
failed: Permission denied

Despite passing the quota responsibility to vpopmail it seems that  
Dovecot still tries to update that file.

And finally the question... How do I get dovecot to not calculate a  
quota for that directory/namespace ?