local PFIX_VER=$(installed_version $SPELL) &&
PFIX_VER=$(echo ${PFIX_VER:0:5} | sed -e 's/\.//g') &&

if [[ $PFIX_VER -lt 255 ]]; then
    persistent_add POSTFIX_VDA &&
    POSTFIX_VDA=$VDA
fi &&

# removed obsolete configuration settings
if [[ -n $POSTFIX_PRE_EXISTING ]]; then
  persistent_remove POSTFIX_PRE_EXISTING
fi &&

if [[ -n $POSTFIX_FIX_MAINCF ]]; then
  persistent_remove POSTFIX_FIX_MAINCF
fi &&

config_query POSTFIX_BENCH "Install smtpstone benckmarking tools?" n &&

if [[ "$POSTFIX_EXP" != "y" ]]; then
    config_query POSTFIX_VDA "Apply Virtual Delivery Agent (VDA) patch? (EXPERIMENTAL)" n
fi