The 2008 Internet Security Trends Report from IronPort Systems estimates that 98 per cent of all email traffic is now spam
Dec 04, 2007 - "Spam volume increased 100 percent, to more than 120 billion spam messages daily worldwide. That's about 20 spam messages per day for every man, woman and child on the planet
The overall trends in spam and malware can be characterized by a larger number of more targeted, stealthy and sophisticated attacks. Specific observations include:
> Spam has become more dangerous.
...In 2007, more than 83 percent of spam contained a URL to a rogue Web server that was frequently serving malware. In accordance with a trend towards the blending of different malware techniques, URL-based viruses increased 256 percent.
> The "Self Defending Bot Network" was introduced...
> Viruses no longer make headlines..."(Full report and links available at the URL above.)