Brightmail, maker of antispam tools, released a new version of its software that now includes <A HREF="http://zdnet.com.com/2100-1105_2-5254157.html?tag=zdnn.alert">features designed to deal with zombie PCs.</A> One way that Brightmail's new software, Anti-Spam 6.0, filters spam is through maintaining lists of spammers' IP addresses, which it calls a Reputation Service.