Possible Duplicate:
What Forum Software should I use?
I have already searched and checked out posts like this and this but it isn't what I'm looking for.
I'm looking for a lightweight PHP/MySQL forum with decent (good) anti spam functionalities.
I have been using punBB which is light and fast but doesn't stop billions of spammers to post boring links, I have tested PHPBB which I found really heavy (and it doesn't stop spammers either).
I'd like the possibility to receive a mail to 'accept' new inscriptions, auto-shut down inscriptions that have never posted (after some time) and so on and a captcha at inscription time (if it is easily modifyable that would be a plus), (public) blacklists and/or adaptive filters to stop spam would be nice too.
Does this exist in any free/cheap forum?