Spam volume has now reached 2010 levels at 2 trillion messages, McAfee said. Spam volume also rises and falls throughout the year. Spam in the United States decreased by 16 percent, McAfee said.
The U.S. hosts the most sites used for spam purposes, McAfee said. Delivery service notification teasers remain popular as well as drug offers. Much of the spam identified in the last quarter contained subject lines related to the Boston Marathon bombings. Many of the messages contained links to malware, McAfee said.