if test -n "$1"; then
  echo "Search $1"
  postqueue -p | grep '^[A-Z0-9]' | grep "$1" | awk '{ print $1 }' | sed 's/[\!\*]//' | postsuper -d -
else
  echo "Deleting all"
  postqueue -p | grep -E '^[A-Z0-9]{10}\!' | awk '{ print $1}' | sed 's/[\!\*]//' | postsuper -d -
fi