[exim] exim ignores maildir++ quota

Hello, Im having some troubles to set up maildir++ quotas (using a
maildirsize file).
Im using exim with dovecot. I use dovecot to set each user quota. The
problem is that exim does not respect the established quota limits on
the maildirsize file. Each time that exim delivers a new mail, it
replaces the quota limits


[root@claudia juan]# cat maildirsize
1073741824S
86147 2
[root@claudia juan]#

OK, first line (afaik) tells that I have 1GB of space to use. The
successive lines descrives, bytes used and number of messages in the
maildir folder
Then I send a test mail:

[root@claudia juan]# exim juan@???
test
.
[root@claudia juan]#

and then:

[root@claudia juan]# cat maildirsize
0S,0C
86147 2
413 1
[root@claudia juan]#

The used space of the maildir folder is mantained, but the first line
was also modified, now the user has unlimited space...

This is my transport config:
local_delivery:
driver = appendfile
directory = /var/mail/$local_part
maildir_format = true
maildir_use_size_file = true
delivery_date_add
envelope_to_add
return_path_add
group = mail
mode = 0600

I read on the manual that the quota option (appendfile tarnsport) if
unset, it sets quota to 0 (this is what happend here). But i need exim
to get the quota limits from this file. Can anyone helpme?


Saludos! Juan