Tumbleweed To Present To Technology Investors At Kaufman Bros. 9th Annual Investor Conference

CEO to Convey Company Market Positioning and Growth Strategies

Redwood City, CA – August 30, 2006 – Tumbleweed® Communications Corp. (NASDAQ: TMWD), a leading provider of email security, file transfer security, and identity validation software and appliances, will be presenting at the Kaufman Bros., L.P. 9th Annual Investor Conference, taking place September 6-7 at The W Hotel, New York, NY.  Securities analysts, fund managers, and institutional investors will attend the event.

Jim Scullion, Chief Executive Officer of Tumbleweed, will discuss the Company’s market positioning and 2006 growth strategies to expand its leadership position in the email security, secure file transfer and identity validation markets. Mr. Scullion’s general session presentation will take place on Wednesday, September 6th at 4:10 pm Eastern Time. A live audio webcast of the presentation will be broadcast at the following link: http://www.wsw.com/webcast/kbro11/tmwd/

This link will also access a replay of the webcast approximately two hours after the presentation ends and will be available for the following 90 days.  The webcast link and replay will also be made available on Tumbleweed’s website in the investor relations section of the site at: http://www.tumbleweed.com. More event information can be found at:
http://www.kbro.com/forum_inv2006.html.

Safe Harbor Statement
Tumbleweed cautions that forward-looking statements contained in this press release are based on current plans and expectations as of the date of this press release, 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 Tumbleweed's participation in the Kaufman Bros., L.P. 9th Annual Investor Conference and the subject matter of Tumbleweed’s presentations. 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 16, 2006 and Form 10-Q filed August 8, 2006.

Tumbleweed assumes no obligation to update information contained in this press release. Although this release may remain available on Tumbleweed's website or elsewhere, its continued availability does not indicate that Tumbleweed is reaffirming or confirming any of the information contained herein.

About Tumbleweed Communications Corp.
Tumbleweed provides security solutions for email protection, file transfers, and identity validation that allow organizations to safely conduct business over the Internet. Tumbleweed offers these solutions in three comprehensive product suites: MailGate®, SecureTransport(TM), and Validation Authority(TM). MailGate provides protection against spam, viruses, and attacks, and enables policy-based message filtering, encryption, and routing. SecureTransport enables business to safely exchange large files and transactions without proprietary software. Validation Authority is the world-leading solution for determining the validity of digital certificates. Tumbleweed's enterprise and government customers include 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, the U.S. Department of Defense, and all four branches of the U.S. Armed Forces. Tumbleweed 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.

Tumbleweed, the Arrows logo, MailGate, SecureTransport and Validation Authority are either registered trademarks or trademarks of Tumbleweed Communications Corp. in the United States and/or other countries. All other trademarks are the property of their respective owners.

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