Ask Slashdot: Why Are Major Companies Exiting the Spam Filtering Business? (slashdot.org)

broswell writes: For years we used Postini for spam filtering. Google bought Postini in 2007, operated it for 5 years and then began shutting it down. Then we moved to MX Logic. McAfee bought MX Logic, and McAfee was purchased by Intel. Now Intel is shutting down the service. Neither company chose to raise prices, or spin off the division. Anyone want to speculate on the reasons?