Review: Email Security Virtual Appliance - attrition.org
Shameless self-promotion of an article I submitted: From Attrition.org : Got spam? Run a mail server? Like saving time & money? Imagine a well-designed, FOSS-based anti-spam solution. Imagine one that meets or exceeds the service of either a hosted solution, or a rack mountable appliance with a slick paint job. Imagine the money you would save if you didn't need your current commercial anti-spam solution Stop imagining.