Postini Reports Eight Percent Drop in Directory Harvest Attacks: Spam and Email Viruses Decline Slightly, PRNewswire, 31 Mar 2005

“Postini, the industry's leading provider of email security and management, today announced that the number of directory harvest attacks (DHAs) by spammers against corporate email dropped in March for the first time in seven months. In March, Postini protected its customers from more than 26 million DHAs, or an average of 843,157 per day. This is an eight percent decrease compared to February's average of 919,963 per day.�

Full story at http://biz.yahoo.com/prnews/050331/sfth033.html?.v=5