Anti-spam tool with a user-defined whitelist. It's a permission based spam blocker that customizes itself to you. Permission-based means ChoiceMail assumes email is spam unless it knows otherwise.
Cloudmark: a company that stops spam and fraud before it costs you money. Cloudmark's groundbreaking, peer-to-peer (P2P) solution (initially Vipul's Razor) proven effective at fighting spam since 1998 and now called SafetyBar, already delivers immediate spam relief to more than a million people.
Spam Sleuth monitors your e-mail box behind the scenes and analyzes e- mail messages for spam, Web bugs, phishing scams, and virus characteristics. Spam Sleuth offers blacklist/whitelist blocking and Bayesian filtering.
Gives you a choice or combination of personal whitelists and blacklists, word filters, DNS blacklist, Bayesian filtering and challeng/response blocking. Also has cell-phone forwarding.