Spam filters can help smooth the waves in your inbox, as long as they are reliable and don’t have too many side effects. We’ll show you what we found when we tested five antispam appliances and two service providers.
Filtering spam as it enters the network keeps control in the hands of IT professionals, increasing the effectiveness of the filter and improving user productivity by reducing the glut of mail. In previous issues of Linux Magazine, we have outlined various software-based scenarios for integrating spam filtering with a mail server. In this article, we’ll look at some alternatives to conventional software-based filters such as SpamAssassin. In particular, we’ll report on some hardware-based spam filtering appliances, and we’ll examine a representative pair of Internet spam filtering service providers.
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