Usefull could be an add-on for Razor and Pyzor, to use Razor and Pyzor in Ebox just edit /usr/share/ebox/stubs/mailfilter/local.cf.mas and add:
#pyzor
use_pyzor 1
pyzor_path /usr/bin/pyzor
#razor
use_razor2 1
razor_config /etc/razor/razor-agent.conf
Then:
# apt-get install razor pyzor
Then restart mailfilter:
/etc/init.d/ebox mailfilter restart