#!/bin/sh
   INSPECT_DIR=/var/spool/filter
   SENDMAIL=/usr/sbin/sendmail
   FOLDER_DISCLAIMER=/etc/postfix/
   DOMAIN="svk.be"

   # Exit codes from <sysexits.h>
   EX_TEMPFAIL=75
   EX_UNAVAILABLE=69

   # Clean up when done or when aborting.
   trap "rm -f in.$$" 0 1 2 3 15

   # Start processing.
   cd $INSPECT_DIR || { echo $INSPECT_DIR does not exist; exit $EX_TEMPFAIL; }

   TEXT_DISCLAIMER=`grep "[[:alnum:]]" ${FOLDER_DISCLAIMER}/disclaimer.txt | grep -v "_" | tail -4 | head -1`
   cat > in.$$ || { echo Cannot save mail to file; exit $EX_TEMPFAIL; }

   # Verify if is there the disclaimer present in the mail body
   grep -q "${TEXT_DISCLAIMER}" in.$$
   let R1="$?"

   # Verify if the sender is from DOMAIN
   #grep "From:" in.$$ | head -1 | grep -i $DOMAIN > /dev/null 2>&1
   echo "$2" | grep -i -q "$DOMAIN"
   let R2="$?"

   # Verify if the recipient is from DOMAIN
   echo "$4" | grep -i -q "$DOMAIN"
   let R3="$?"

   if [[ $R1 != 0 && $R2 == 0 && $R3 != 0 ]]; then
       /usr/bin/altermime --input=in.$$ \
                      --disclaimer=${FOLDER_DISCLAIMER}/disclaimer.txt \
                      --disclaimer-html=${FOLDER_DISCLAIMER}/disclaimer.html || \
                      { echo -e \n Message content rejected; exit $EX_UNAVAILABLE; }
   fi

   $SENDMAIL -i "$@" < in.$$

   exit $?