Mailtrust Offers the Choice Between Exchange and Noteworthy on a Per-User Basis

Email Specialist Makes Blackberry Sync Functionality Available to More than 700,000 Business Email Users Worldwide

BLACKSBURG, Va. – April 2, 2008 - Mailtrust™, a leading business-class email hosting specialist and a division of Rackspace®, today announced that its flagship business-class email product, Noteworthy® can now be synchronized with Blackberry. For the first time ever, 85,000 businesses and 700,000 Noteworthy users throughout the world can coordinate all of their contacts, calendar events, and tasks between their Blackberry handhelds and their Mailtrust hosted email client.

Previously, those that were both Mailtrust and Blackberry users had to manage the two separate systems; however, now with sync capabilities, all data is centralized, synchronized, and always up to date. Although this is not new for many Blackberry users that run Microsoft Exchange and Blackberry Enterprise Server (BES), Mailtrust customers who do not use BES or Exchange can also enjoy some of the same features, making Noteworthy/Blackberry sync a perfect combination.

"We see the addition of sync capabilities to be vital in demonstrating our commitment to business-class email. For our business email users, mobility ability is a definitive growing need and Blackberry is the corporate standard when it comes to email mobility," said Pat Matthews, president of Mailtrust. "In an increasingly mobile world, this is essential because now, regardless of location, our customers can view their contacts, calendar, and task lists, add to them, and have the peace of mind that all of their data will be available when they return to their desks."

With Noteworthy/Blackberry sync capabilities, Mailtrust customers will now have the majority of the important Blackberry functionality without having to use Microsoft Exchange or Blackberry Enterprise Server in the background. To utilize this functionally, users need only to install a simple-to-use plug-in on their Blackberry devices, configure their options and set the device to auto-sync at specific intervals and the functionality is immediately available.

Mailtrust, which recently changed its name from Webmail.us to highlight business-class email as the core of the company's service offering, does also offer Managed Microsoft Exchange Hosting, giving their customers a choice of platforms depending on their size, functionality and budgetary needs. Visit the new site at www.mailtrust.com.

About Rackspace

A recognized leader in the global IT marketplace, Rackspace® delivers a diverse suite of enterprise-class hosted IT services to businesses of all sizes. Customers choose Rackspace for its hosting specialization and expertise, backed by the company's award-winning Fanatical Support®. By integrating the industry's best technologies and delivering them as services, Rackspace serves as an extension of its customers' IT departments. Because Rackspace removes the burden of infrastructure maintenance and management, customers can focus on their core business. Rackspace's portfolio of companies also includes the Mosso® ( www.mosso.com) cloud computing platform and Mailtrust™ ( www.mailtrust.com ) a provider of business-class hosted email solutions. For more information on Rackspace, please visit www.rackspace.com, or call 800-961-2888.

About Mailtrust

Mailtrust™, a Rackspace company, provides more than 85,000 small, medium, and geographically dispersed companies with business-class email hosting. The company manages and maintains the email service and hosting infrastructure, freeing up IT resources and eliminating the need for customers to purchase email-related hardware, software, and security services—all for a fraction of the cost of purchasing and managing email services in-house. Founded in 1999, and acquired by Rackspace in 2007, Mailtrust is headquartered in Blacksburg, Virginia and was recently named the 217(th) fastest growing, privately held company in America by Inc. Magazine. To learn more, please visit www.mailtrust.com.