Store Community Support Documentation
What's the best way to control spam in version 1.6.20 Konsort?
Have a look at Griddie's addon - not sure if it is compatible with 1.6.20 but worth a shot
he said his add-on wasn't dependent on any phpfox version
also look at Santockis Restriction Controller module
I know this is quite an "old" post, just in case it helps:
Yes SpamTrawler is compatible with phpFox v1.6 as well.
try spam trawler!!