Official Google Enterprise Blog: “In July, our Postini datacenters saw the biggest volume of email virus attacks so far in 2008, with a peak of nearly 10 million messages on July 24. One of the more prominent attacks in the month involved a spoofed UPS package-tracking link that was intended to lure recipients into clicking on it and downloading malware. Our zero-hour virus protection technology first started catching these emails on July 20.”