Tumbleweed Embeds Verity KeyView Filter Technology in its Email Firewall

Selection Based on "Versatility, Performance, Overall Quality"

SUNNYVALE and REDWOOD CITY, Calif. - 2004-03-09 - Verity Inc. (NASDAQ: VRTY), a leading provider of enterprise software that helps organizations maximize the return on their intellectual capital investment, today announced Tumbleweed® Communications Corp. (NASDAQ: TMWD), a leading provider of secure Internet messaging software for enterprises, financial services organizations and government, has integrated the Verity® KeyView® Filter Software Development Kit (SDK) into its Tumbleweed Email Firewall™.

The Tumbleweed Email Firewall protects, filters and secures email traffic at the Internet gateway with an integrated set of anti-spam, anti-virus, anti-hacker, content filtering, email relay, and encrypted messaging capabilities—minimizing email communications risks and reducing email management costs. Verity KeyView Filter SDK is used in the system's decomposition process, which performs granular analysis of outgoing email content to determine if email security or policy is being breached in any form. Inbound mail is evaluated similarly to reduce or eliminate spam, attachments infused with viruses and other items that do not belong in a typical enterprise environment.

"The versatility, performance and overall quality of the KeyView technology made its selection for integration into the Tumbleweed Email Firewall easy," said Joe Fisher, Tumbleweed's director of product management. "The breadth of file types supported by the Verity technology and its consistent reliability were superior to other filter technologies on the market and more cost effective than building a home-grown solution."

Verity KeyView Filter automatically recognizes up to 295 file formats to permit email content and attachments to be sent to an enterprise's email policy engines where the appropriate protective measures are taken by the content filtering capabilities of the Tumbleweed Email Firewall. The Verity technology can be integrated quickly into Tumbleweed's email firewall because it supports a range of programming environments, such as C, Java and Com; as well as the Unicode character set standard. It also provides support for the latest versions of the most widely used operating systems, including Linux, UnixTM and Windows Server 2003.

"This is an important, effective use of Verity KeyView Filter technology. Email-related risk management and security cannot be understated," said Andrew D. Feit, Verity's senior vice president of marketing. "We are pleased to see the integration of KeyView perform so effectively for Tumbleweed in its email firewall."

According to Fisher, customers have been very happy with the Verity KeyView decomposition capabilities of Tumbleweed's email firewall.

About Tumbleweed Communications Corp.

Tumbleweed is a leading provider of secure Internet messaging software products for enterprises, financial services organizations and government. By making Internet communications secure, reliable and automated, Tumbleweed's email firewall, secure file transfer, secure email, and identity validation solutions help customers significantly reduce the cost of doing business. Tumbleweed products are used by millions of end-users and tens of thousands of corporations. Tumbleweed customers include ABN Amro, Bank of America Securities, Catholic Healthcare West, JP Morgan Chase & Co., The Regence Group (Blue Cross/Blue Shield), Society for Worldwide Interbank Financial Telecommunication (SWIFT), St. Luke's Episcopal Healthcare System, the US Food and Drug Administration, and the US Navy and Marine Corps. Tumbleweed Communications was founded in 1993 and is headquartered in Redwood City, Calif. For additional information about Tumbleweed go to www.tumbleweed.com or call 650-216-2000.

About Verity

Headquartered in Sunnyvale, Calif., Verity provides software solutions that help organizations maximize the return on their intellectual capital investment by utilizing Verity's industry-leading enterprise search, classification and personalization technologies. Verity software is used for sharing information within and between enterprises; for facilitating e-commerce sales; and for B2B activities on Web-based market exchanges. In addition, Verity technology serves as a core component of many leading e-business applications.

Verity products are used by more than 3,500 organizations in the private and public sectors. Customers include Adobe Systems, AT&T, Bristol-Myers Squibb, Cap Gemini Ernst & Young, Cisco, Documentum, Dow Jones, EDGAR Online, Financial Times, H-P, Home Depot, Lotus, META Group, SAP, Siemens, Stellent, Sybase, Time New Media and Timex.

This press release contains forward-looking statements relating to Verity and the expected benefits Tumbleweed will receive from utilizing the Verity KeyView Filter SDK. Actual results are subject to risks and uncertainties, including the risk that integration of the Verity SDK into Tumbleweed Email Firewall will not perform as anticipated as a result of unforeseen technical difficulties. These and other risks relating to Verity and its business and products are set forth under the caption "Risk Factors" in Item 1 of Verity's latest Form 10-K filed with the Securities and Exchange Commission.

Tumbleweed Safe Harbor Statement

Tumbleweed cautions that forward-looking statements contained in this press release are based on current plans and expectations, and that a number of factors could cause the actual results to differ materially from the guidance given at this time. These factors are described in the Safe Harbor statement below.

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 features and benefits of Tumbleweed's Email Firewall products and Verity's KeyView SDK. 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 June 4, 2003, Form 10-Q filed November 14, 2003, and Form S-3/A filed December 19, 2003.

Tumbleweed assumes no obligation to update information contained in this press release, which represents the company's expectations only as of the date of this release and should not be viewed as a statement about the company's expectations after such date. Although this release may remain available on either company's website or elsewhere, its continued availability does not indicate that the company is reaffirming or confirming any of the information contained herein.

For more information, contact Verity at info@verity.com or at World Wide Web site http://www.verity.com or call 408-541-1500.

Verity and the Verity logo are registered trademarks or trademarks of Verity, Inc.

Verity Editorial Contacts:

Winifred Shum

Verity, Inc.

(408) 542-2363

wshum@verity.com

Steve Hoechster

ElsterGroup

(646) 495-5401 or (914) 393-9219

shoechster@elstergroup.com

Tumbleweed Editorial Contact:

James Hannon

Atomic PR

(415) 703-9454

james@atomicpr.com

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