Frankly My Dear, I Don't Give a Spam

"Many businesses are still filtering email and killing spam in-house,using either software installed on their mail server, or by installing specialist hardware (appliances) at the network edge. Others are choosing to keep spam at bay by outsourcing the problem and subscribing to a hosted filtering service. The market for these services is about to hot up, as more vendors set up in Europe and seek resellers." Source: VNUnet