Clearswift Names Chak Cheung Vice President and General Manager Americas.

Business Editors/High-Tech Writers

SEATTLE--(BUSINESS WIRE)--May 9, 2002

Clearswift, the leader in the security and management of electronic communications, Thursday announced that it has named Chak Cheung vice president and general manger Americas, effective immediately.

In this role, Cheung will oversee day-to-day American operations and U.S. sales strategy.

Previously, Cheung served as vice president of U.S. operations for Baltimore Technologies MIMEsweeper Group, which was acquired by Clearswift Corp. in March 2002.

"Chak brings a wealth of experience to Clearswift," said Don Taylor, chief executive officer, Clearswift Corp. "He has demonstrated the ability to help us grow the U.S. region and to meet our aggressive corporate growth plan. We are pleased to have Chak join us as part of the management team."

Cheung has 18 years of experience in the IT industry in various senior executive positions in the areas of sales and channel management, executive leadership, consulting services, operational and business management and strategic alliances. He has worked with Internet companies and vertical markets and has served on various committees and advisory councils for several companies in the past.

About Clearswift

Clearswift is the world leader in the security and management of electronic communication, with a 30 percent share of the global e-mail filtering market.

Clearswift provides solutions, which protect organizations of all sizes and complexity from the threats posed by e-mail, Web access, virus and spam. Clearswift's expertise is in threat prevention and risk reduction, through the definition and deployment of policy on multiple types of content.

Content security threats include the circulation of inappropriate images and text, oversize files that cause degradation in network service, loss and corruption of data, breaches of confidentiality, as well as viruses and malicious code.

Clearswift's complementary products are Clearswift MIMEsweeper and Clearswift ENTERPRISEsuite. Clearswift MIMEsweeper (MSW) is the world's leading family of policy-based Web, e-mail and Intranet content security solutions. MIMEsweeper runs on Windows and has been designed to be feature-rich, customizable and distributed through indirect sales channels.

Clearswift ENTERPRISEsuite (ES) is a suite of policy-based secure content solutions for large, complex organizations. ES offers unrivalled usability, platform availability (Windows, Unix and Linux), scalability and performance. ES solutions are sold by Clearswift's direct sales force.

Clearswift has 12,200 customers and 11 million end users worldwide. Forty percent of the Fortune Global 500 are Clearswift customers.

The company's world headquarters and the MIMEsweeper engineering team are in Theale, Berkshire, U.K., with the ENTERPRISEsuite engineering team in Welwyn Garden City, Hertfordshire, U.K. Sales offices are in the United States (East and West Coast), Germany, France, Japan and Australia.

In March 2002, Clearswift acquired Content Technologies from Baltimore Technologies. More information about Clearswift, its products and services is available at www.clearswift.com.