Enable SpamAssasin Serverwide:

for x in `cut -d: -f2 /etc/trueuserdomains` ; do touch /home/$x/.spamassassinenable ; chown $x.$x /home/$x/.spamassassinenable ; done

Enable SpamBox Serverwide:

for x in `cut -d: -f2 /etc/trueuserdomains` ; do touch /home/$x/.spamassassinboxenable ; chown $x.$x /home/$x/.spamassassinboxenable ; done