[exim] User filters and quota

Hi!
I have a problem. This is the transport that manages the user filters on my mail server.
folder_put: debug_print = "TRANSPORT: folder_put -> $local_part@$domain"
driver = appendfile
delivery_date_add
envelope_to_add
return_path_add
user = exim
group = exim
maildir_tag = ,S=$message_size
headers_remove = X-XXX
create_directory
maildir_use_size_file = true
maildir_quota_directory_regex = ^(?:cur|new|\..*)$
quota_directory=${extract{homeDirectory}{$address_data}{$value}fail}/Maildir
quota_size_regex = ,S=(\d+)
quota = ${extract{mailQuota}{$address_data}{$value}fail}
quota_warn_threshold = 90%
quota_warn_message = "\
To: $local_part@$domain\n\
Subject: La capacidad de su buzón correo está llegando al límite \ establecido por su administrador de correo.\n\n \
Si se alcanza este límite no podrá recibir nuevos correos hasta \n \
que libere espacio en su buzón\n"

This is the email's format in the user's mailbox when the user hasn't filters.
1237802203.H616040P1731.buzon02,S=66861:2,S

And this is the email's format in the user's mailbox when the user has filters. (has no standard format)
q1M7PSo-26182211:2,S

The problem is that when the user has users filters isn't calculated his mailbox's quota so his mailbox's size grows indefinitely.
Thank you very much for your help.


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