Executives to Convey Company Market Positioning and Growth Strategies

Redwood City, CA – May 28, 2004 – Tumbleweed® Communications Corp. (NASDAQ:TMWD), a leading provider of secure Internet messaging software and hardware for enterprises and government agencies, will be presenting to security and technology investors at the Rodman and Renshaw Techvest Global Security Conference on June 7th in New York. The event will be held at the Mandarin Oriental Hotel, and will be attended by security analysts, fund managers, and institutional investors.

Jeff Smith, Chief Executive Officer, and Tim Conley, Chief Financial Officer of Tumbleweed, will present an overview of the Company's business and product strategy.

Information about the Rodman and Renshaw Techvest Global Security Conference can be found at: http://www.rodmanandrenshaw.com.

About Tumbleweed Communications Corp.
Tumbleweed is a leading provider of secure Internet messaging software and hardware for enterprises and government agencies. By making Internet communications secure, reliable and automated, Tumbleweed's anti-spam email firewall, secure file transfer, secure email, and identity validation solutions help customers significantly reduce the cost of doing business. Tumbleweed products are used to communicate with millions of end-users and tens of thousands of corporations. Tumbleweed has more than 600 enterprise customers, including ABN Amro, Bank of America Securities, Catholic Healthcare West, JP Morgan Chase & Co., The Regence Group (Blue Cross/Blue Shield), St. Luke's Episcopal Healthcare System, the U.S. Food and Drug Administration, and the U.S. Navy and Marine Corps. Tumbleweed Communications was founded in 1993 and is headquartered in Redwood City, California. For additional information about Tumbleweed go to www.tumbleweed.com or call 650-216-2000.

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