[vexim] Vexim 2.2.1 quota support

[Adam roland]

hi everybody,

i just installed exim4-daemon-heavy 4.63-17 + courier POP3/IMAP backend 
with vexim 2.2.1frontend and say it's going very well,
indeed one thing doesn't seem to be working; the quota support;

let's see my exim4.conf;

virtual_delivery:
...
quota = ${lookup mysql{select users.quota from users,domains \
                where localpart = '${quote_mysql:$local_part}' \
                and domain = '${quote_mysql:$domain}' \ 
                and users.domain_id = domains.domain_id}{${value}M}}
  quota_is_inclusive = false
  #quota_size_regex = ,S=(\d+): 
  quota_warn_threshold = 75% 
  maildir_use_size_file =
false                                                                                                                                                                                   

  # maildir_quota_directory_regex = ^(?:cur|new|\.(?!Trash).*)$
  quota_warn_message = "To: $local_part@$domain\n\   
                        Subject: Mailbox quota warning\n\n\
                        This message was automatically generated by the
mail delivery software.\n\n\
                        You are now using over 75% of your allocated
mail storage quota.\n\n\
                        If your mailbox fills completely, further
incoming messages will be automatically\n\
                        returned to their
senders.\n\n\                                                                                                                                                           

                        Please take note of this and remove unwanted
mail from your mailbox.\n"


in every situation the user reach the 75% size of the mailbox, the
system doesn't sent the warning message,

can someone point me to the solution?

cheers,

Roli