Tumbleweed Solutions Make Email Safe for Business Communications

REDWOOD CITY, CA - April 5, 2000 - Tumbleweed® Communications Corp. (Nasdaq:TMWD), a leading provider of secure Internet communications services, today launched a comprehensive set of solutions for securing and managing business communication channels.

"Email is challenging the telephone as the primary business communication channel - that creates opportunities and introduces challenges for every enterprise. Groupware email solutions are widely used, but their benefits don't reach beyond the corporate firewall. Internet email has broad reach but lacks security and management services - the base requirements for any business messaging platform," said Jeffrey C. Smith, president and CEO, Tumbleweed Communications Corp. "Enterprises need to reach every customer, business partner and supplier on the Internet via a rich, secure two-way communications channel. Tumbleweed solutions make that possible."

Combined, Tumbleweed Integrated Messaging Exchange™ (IME™) and Tumbleweed Messaging Management System™ (MMS™) provide a turnkey security and management solution for business critical messaging. Tumbleweed IME enables businesses to create a secure, interactive communications channel to reach their customers and partners. Tumbleweed MMS provides email management services that extend groupware's capabilities by allowing businesses to protect valuable corporate information as it leaves the enterprise to travel over the Internet.

Deploying both Tumbleweed IME and MMS enables enterprises to create a secure communications platform, to define policies, archive information, monitor messaging traffic and to intelligently route sensitive messages - whether the messages are created by an individual or an automated system. Tumbleweed solutions work with existing groupware servers to automatically redirect sensitive traffic to Tumbleweed IME - no end user action is required to send a groupware-generated message securely over the Internet.

About Tumbleweed Communications Corp.
Tumbleweed is a leading provider of solutions for managing secure communication and collaboration to enable the business Internet. Tumbleweed's robust policy-based framework empowers organizations to safely share and protect critical information, increase customer loyalty and privacy and dramatically reduce costs. Tumbleweed is trusted by 1,000 blue-chip customers including American Express, Chevron, Datek Online, the European Union's Joint Research Council, First Union Wachovia, John Deere, Merrill Lynch, Nike, Northern Trust, NTT, Salomon Smith Barney, Travelers and US Food and Drug Administration. One hundred of the Fortune 500 are Tumbleweed customers. Tumbleweed Communications was founded in 1993 and is headquartered in Redwood City, Calif., with offices around the world.

Except for the historical information contained herein, the matters discussed in this press release may constitute forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from those projected, particularly with respect to the security features of Tumbleweed's products and the activities of any third party. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "should," "potential," "continue," "expects," "anticipates," "intends," "plans," "believes," "estimates," and similar expressions. For further cautions about the risks of investing in Tumbleweed, we refer you to the documents Tumbleweed files from time to time with the Securities and Exchange Commission, particularly Tumbleweed's Form 10-K filed March 30, 2001 and Form 10-Q filed November 13, 2001. Tumbleweed assumes no obligation to update information contained in this press release.