Tumbleweed Delivers IME Personalize; New Application Extends Secure Online Communications to Include Targeted Marketing Messages.

REDWOOD CITY, Calif.--(BUSINESS WIRE)--Aug. 24, 1999--

Tumbleweed Communications Corp. (Nasdaq:TMWD), a leading provider of secure Internet communications services, today announced IME Personalize, software specifically designed to help marketers retain and re-engage online customers.

IME Personalize is an application built on top of Tumbleweed Integrated Messaging Exchange(TM) (IME(TM)), a set of products and services that leverage the Internet and existing e-mail to create a secure, trackable online communications channel. IME Personalize extends this rich communications channel by enabling a company committed to secure online customer communication to deliver targeted marketing messages to its customers via the same means.

"Many companies have deployed Tumbleweed IME to establish a secure outbound communications channel," said Jeffrey C. Smith, president and CEO, Tumbleweed Communications Corp. "Tumbleweed IME delivers cost-efficiency and timeliness without sacrificing security, trackability and reliability. Our customers can use IME Personalize to leverage this channel for personalized marketing messages as well."

According to Don Peppers, partner at Peppers and Rogers Group and co-author of the international bestseller, The One to One Future: Building Relationships One Customer at a Time, "The Web started as a mass communications tool, and it's still finding its way as an interactive marketing tool. There is remarkable potential for establishing 1to1 marketing relationships among the diverse customer base the Web delivers - but it is critical to have the right tools to collect data and manage those relationships. Products such as Tumbleweed's IME Personalize are important additions to any 1to1 marketer's tool set."

IME Personalize enables marketers to add marketing messages to the secure online communications that Tumbleweed IME delivers. With the straightforward, browser-based interface, non-technical users can leverage personal profile data and preferences to define and transmit a variety of targeted marketing messages to their customers automatically. For example, a bank delivering a monthly statement online could deliver a different message regarding investment planning within each customer's statement, depending on the needs of the target customer.

For further details about IME Personalize please see http://www.tumbleweed.com/solutions/ime_personalize_overview.htm.

About Tumbleweed Communications Corp.

Tumbleweed Communications is a leading provider of secure online communication services. Tumbleweed Integrated Messaging Exchange (IME) includes all the components necessary to develop and deploy online business applications involving the delivery of files and documents. Working with existing e-mail systems and online applications, Tumbleweed IME powers universal messaging solutions ranging from confidential, trackable business exchanges to secure, automated transactions.

Founded in 1993, Tumbleweed (Nasdaq:TMWD) is headquartered in Redwood City, California. Tumbleweed customers include the Chase Manhattan Bank, the European Commission, United Parcel Service (UPS), Pitney Bowes, and NTT. Tumbleweed partners include Sun Microsystems, Oracle, VeriSign, and RSA. Additional information about Tumbleweed Communications can be found at www.tumbleweed.com.

Tumbleweed is a registered trademark and Integrated Messaging Exchange and IME are trademarks of Tumbleweed Communications Corp.

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. 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. The company assumes no obligation to update information contained in this press release.