Using various 'lists' to stop spam

Battling spam and spyware is a daily fight, and as tech leaders know there are lots of different approaches and technologies to grab. One big category is the list: blacklist, whitelist and greylist. Most have likely heard and know the value of whitelisting to ensure email arrives and doesn't get caught in spam filters. But many might not know how greylisting works into the mix between the two extremes of email protection and why blacklisting can be a dangerous environment to move into.

For more on the listing way to stop spam:
- read this InfoWorld article