Okay I have mails coming through a spam/virus filter to a separate box
running exim 4.52 and courier-IMAP/POP on FreeBSD 5.4.

I am delivering mail virtually to users from a MySQL table.  In the
messages there is the X-Spam-Score header.  I want to on _this_ box, to
throw away mail if it is above sa_refuse or tag (modify the subject line
and add X-Spam-Flag header) it if it is above sa_tag on a per user
basis.

Do I do this in the routers or transports sections?  If so how do I do
it?  Below is my routers and transports section.  Where would I put what
to do what I want.

------------------routers------------------------------

MAILDIR_FILE = SELECT smtp from users where localpart = \
   '${quote_mysql:$local_part}'
SA_TAG = SELECT sa_tag from users where localpart = \
   '${quote_mysql:$local_part}'
SA_REFUSE = SELECT sa_refuse from users where localpart = \
   '${quote_mysql:$local_part}'
virtual_domains:
   driver = redirect
   allow_fail
   # Lookup the maildir directory
   data = ${lookup mysql{MAILDIR_FILE}}
   local_part_suffix = -*
   local_part_suffix_optional
   retry_use_local_part
   file_transport = virtual_delivery
   reply_transport = address_reply
   pipe_transport = address_pipe

------------------transports---------------------------
virtual_delivery:
   driver = appendfile
   envelope_to_add
   return_path_add
   mode = 0660
   maildir_format = true
   create_directory = true
   directory = ${lookup mysql{MAILDIR_FILE}}
   user = 26
   group = 6


TIA

-John

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