[Dovecot] lda quota

[razor]

hello
i am using dovecot-1.0.r7 on freebsd 5.4
everything is fine, but i wanna more -)

i am using dovecot-lda + plugin quota. when i am trying to send a email  
for user with overquota i am getting   "local delivery failed". can i make  
some more informatic message for users like "your recipient box is  
overquoted".

exim configure :

...
dovecot_delivery:
   driver = pipe
   debug_print = "T: ldap_maildir_home for $local_part@$domain"
   command = /usr/local/libexec/dovecot/deliver -d $local_part
   message_prefix =
   message_suffix =
   user = mailnull
   group = mail
   delivery_date_add
   envelope_to_add
   return_path_add
   log_output
...

dovecot.conf

...
protocol lda {
   mail_plugins = quota
}
...

thanx

-- 
regards, Razorenov Alex