# try to find the postqueue executable
if [ -z "$postfix_postqueue" -o ! -x "$postfix_postqueue" ]
then
- postfix_postqueue="`which postqueue 2>/dev/null`"
+ postfix_postqueue="$(which postqueue 2>/dev/null || command -v postqueue 2>/dev/null)"
fi
if [ -z "$postfix_postqueue" -o ! -x "$postfix_postqueue" ]