A very big source of global junk e-mails, China, is understandably slowly sliding down the list containing the most spam-generating countries worldwide. In fact, the IronPort groups of the anti-spam company Cisco Systems places China on No.18 within its top spam producing countries list. Two years back, the country was consistently among the top 5, thus the present situation suggests a huge decline. PCWorld published this on February 26, 2011.