AppRiver LLC, a leading supplier of business email security solutions, today announced an agreement to supply its SecureTide™ spam and virus detection technology to Rackspace Managed Hosting™, a recognized leader in the global managed hosting market.

Under the agreement, Rackspace will deploy the powerful solution that uses more than 60 types of filtering techniques to rid incoming email of worms, viruses, phishing attempts and other protocol-based vulnerabilities to add a critical security layer to its Managed Microsoft Exchange, the latest addition to Rackspace's comprehensive email solution portfolio.

SecureTide also provides perimeter security to protect from a myriad of attacks, including Denial of Service (DOS) and Directory Harvesting, and reduces bandwidth consumption and mailbox clutter, ensuing improved efficiency and system performance for Rackspace customers.

"We are excited to be deployed as a critical element of Rackspace's newest service," said Scott Cutler, AppRiver's executive vice president. "Rackspace is a worldwide leader in meeting the most critical needs of businesses for IT infrastructure and application availability. To be chosen as part of their Exchange Hosting is a strong endorsement of our email security technology."

Offering companies of all sizes an on-demand and highly available implementation of Microsoft's popular email and collaboration solution, Managed Microsoft Exchange from Rackspace includes advanced email with shared calendars, contact lists, public folders and task management features to enhance individual and team productivity. The fully-managed service approach transforms Microsoft Exchange Server 2003 into a simple and scalable service in which customers only pay for the mailboxes they plan to use.

"Our relationship with AppRiver enables us to deliver spam and antivirus protection as an all-inclusive feature to every customer utilizing Managed Microsoft Exchange from Rackspace," said Emil Sayegh, director, Product Marketing, Rackspace Managed Hosting. "AppRiver's SecureTide is a key part of our comprehensive security strategy to better protect our Managed Exchange customers. The company not only offers some of the best email spam and antivirus protection available, but they share in our customer service philosophy which has made our Fanatical Support™ renowned throughout our industry."

After completing a successful beta test of Managed Microsoft Exchange from Rackspace with positive customer feedback, the company is now hosting thousands of mailboxes for hundreds of customers around the world who entrust the company to manage their mission-critical email functions.