I'm sorry, there is no such page as [ -x /usr/sbin/exim -a -f /etc/exim/[ -x /usr/sbin/exim -a -f /etc/exim/exim.conf?.
No other page links to [ -x /usr/sbin/exim -a -f /etc/exim/[ -x /usr/sbin/exim -a -f /etc/exim/exim.conf yet.