You could include a line like this:
Code:
${FORMAIL} -I "X-Virus-Scanner: `/home/admispconfig/ispconfig/tools/clamav/usr/bin/clamscan -V` on `date`" < ${MSGDIR}/rec.msg | ${PROCMAIL}
But make sure to comment out this line:
Code:
${FORMAIL} -I "$VKLUDGE Scanned by $TSCV running on $HOSTNAME" < ${MSGDIR}/rec.msg | ${PROCMAIL}