Internet Security Assured Through Australia's First Secure Online Document Delivery Product

Secure communications channel facilitates rapid delivery of account information

Sydney, Australia - May 1, 2000 - Australian business is set to benefit from the launch of a secure online document delivery product that enables users to send, track and receive confidential documents across the Internet. The first product of its kind in the Australian market, themailxchange.com has been developed by secure online services company, The Online Mail Exchange Pty. Ltd.

themailxchange.com allows for documents to be encrypted using a 128 bit encryption, encrypted and password protected, or simply tracked depending on the requirements of the sender. Every document can be tracked during the delivery process from the time it is sent until the intended recipient opens it.

"More of us each day are looking to the Internet for communicating immediately and economically. But security has always been a major concern. We have overcome this obstacle with the launch of the first of our secure Internet products, themailxchange.com," said Nick Montague, General Manager of The Online Mail Exchange Pty. Ltd.

"Documents of a highly sensitive nature such as digitally signed legal contracts, online stock trade confirmations, budget spreadsheets or medical test results, can now be sent with the assurance of absolute security," said Mr. Montague.

No additional software or hardware is required to operate themailxchange.com. Users register online and receive a unique member login and password to access themailxchange.com services. Using an email type interface, documents of any size or format can be sent anytime to anyone with an email address and a web browser anywhere in the world. As part of the launch, themailxchange.com is offering a trial of 10 free secure emails from its website.

themailxchange.com is powered by Tumbleweed Communications Corp.'s Integrated Messaging Exchange™ (IME™). "We chose Tumbleweed IME™ as the foundation for themailxchange.com because of its proven track record in Internet communications services with proven security and a strong platform," said Mr. Montague.

Mr. Jeffrey C. Smith, president and CEO, Tumbleweed Communications Corp. added, "themailxchange.com will offer Australian businesses a secure and reliable online communications platform. In using Tumbleweed IME™, themailxchange.com has not only launched the first Australian service for delivering confidential documents over the Internet, but has also placed control firmly in the hands of the customer - enabling them to select the appropriate level of security and delivery timing, all through a trackable process." Cost for themailxchange.com is significantly less than couriers and faxing. Customers pay as they use the service. Prices range from $5.00 to $2.50 for each delivery depending upon usage. Customers making 30 or more deliveries a month can apply for a corporate account.

The company has established a sales force in Melbourne and Sydney and expects to expand into the Brisbane, Queensland, South Australian and Western Australian markets by 1 July, 2000.

The Online Mail Exchange Pty. Ltd. is a wholly owned subsidiary of Salmat Pty. Ltd., Australia's largest customer communications company. The Online Mail Exchange extends Salmat's product range to cover all aspects of the customer communications mix whether it be paper, voice or online. The subsidiary was established in 2000 in response to the growing demand for secure online communications.

Tumbleweed is a registered trademark and Integrated Messaging Exchange, IME, and Messaging Management System (MMS) are trademarks of Tumbleweed Communications Corp

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.