Tumbleweed to Speak at First Annual Content Monitoring and Filtering World Conference

Tumbleweed CTO and SSL Inventor Dr. Taher Elgamal Joins Top CTOs to Discuss Trends and Challenges in Content Monitoring and Filtering and Data Leak Prevention

Redwood City, Calif., March 26, 2007 – Tumbleweed Communications Corp. (Nasdaq: TMWD), the industry's leading pure play messaging security vendor, today announced that CTO Dr. Taher Elgamal will speak at the Content Monitoring and Filtering (CMF) World Conference on April 23 and 24, 2007 at the Hyatt Regency McCormick Place in Chicago.

Dr. Elgamal will participate in CMF World's CTO panel, on Monday April 23 from 3:30-5:00 p.m. The CTO panel, featuring CTO's from ten leading vendors, will discuss trends and strategies on how to best utilize content monitoring and filtering to protect confidential enterprise information and intellectual property from data leakage.

CMF World is the first security conference focused entirely on content monitoring and filtering (CMF) technology solutions and data loss prevention processes. CMF technology is taking on greater importance in order to meet regulatory mandates covering the confidentiality of certain information such as HIPAA, GLB and SOX as well as the challenges of protecting information assets against intellectual property theft and data loss.

For further details and to register, please visit: http://www.telestrategies.com/cmf07/

Safe Harbor Statement
Tumbleweed cautions that forward-looking statements contained in this press release are based on plans and expectations as of the date of the 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 Content Monitoring and Filtering World Conference and the subject matter of Tumbleweed's presentations at the conference. 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 14, 2007.

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
Tumbleweed Communications Corp.(NASDAQ:TMWD), the industry’s leading pure play messaging security vendor, provides world-class innovative messaging security solutions for organizations of all sizes.  Organizations rely on Tumbleweed's solutions to securely manage their Internet communications, spanning email management to file transfers. Tumbleweed has more than 2,400 customers worldwide, representing industries such as Finance, Healthcare, and the U.S. Government. The world’s most security conscious organizations rely upon Tumbleweed technology including Bank of America Securities, JP Morgan Chase & Co., the U.S. Food and Drug Administration, and the U.S. Department of Defense. Our award-winning products build on thirteen years of R&D and 26 security patents in the U.S. alone – many of which are licensed by other security vendors. More information can be found at www.tumbleweed.com.

###