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Tumbleweed Press Releases

ARKANSAS CHILDRENS HOSPITAL IMPLEMENTS TUMBLEWEED'S EMAIL FIREWALL

Tumbleweed Email Firewall Reduces Spam Rates, IT Management Time and Network Bandwidth; Secures Outbound Messages for HIPAA Compliance

Redwood City, CA – September 21, 2004 – Tumbleweed® Communications Corp. (NASDAQ:TMWD), a global leader in email security and secure data technologies, today announced that the Arkansas Children’s Hospital has selected and implemented Tumbleweed’s Email Firewall™ to safeguard its network resources and users, protect critical information, and dramatically reduce costs by protecting its inbound email communications from spam, viruses and other inbound email threats. Since going live with the Tumbleweed Email Firewall™, Arkansas Children's Hospital has reported a five-fold improvement over their previous spam solution.

Arkansas Children’s Hospital supports 1,800 email users and processes 78,000 inbound and outbound email messages, on a weekly basis. Before adopting Tumbleweed’s solution, the hospital had been using multiple point products to manage its email security, which offered limited services and required heavy management time. When the hospital wanted to replace the defunct system with a single comprehensive secure Internet communications solution, administrators at Arkansas Children's Hospital began to look at different email management products, finding that most of them were not capable of meeting all the hospital’s email security requirements: anti-spam, anti-virus, content filtering, email relay, and encrypted messaging capabilities. The hospital reviewed the Tumbleweed Email Firewall™ and was struck by its impressive set of powerful and integrated capabilities. The hospital purchased the Tumbleweed Email Firewall™ to protect their inbound email and secure their outbound messages to comply with HIPAA regulations.

“We are pleased that the Arkansas Children’s Hospital, has enjoyed such a dramatic reduction in unwanted email, while securing the hospital’s outbound messages to comply with HIPPA regulations, said Jeffrey Smith, Chairman and CEO of Tumbleweed. "It is important for such an organization to keep their focus on saving lives, not combating spam and electronic viruses. Given the sensitivity of health records and importance of HIPAA compliance, we believe the healthcare industry can benefit greatly from our solutions."

Healthcare organizations must comply with HIPAA regulations for sending email containing Protected Health Information (PHI). Arkansas Children's Hospital needed to protect its outbound mail containing suspected PHI by automatically identifying email containing PHI and encrypting and securely delivering the message to the recipient. Spam-heavy inbound email was another big problem at Arkansas Children's Hospital, where a large volume of junk email was devouring bandwidth and server space, and increasing administrator and end-user time.

“The Tumbleweed Email Firewall solved Arkansas Children's Hospital’s email challenges,” said Mac Madkins, Security Administrator for Arkansas Children's Hospital. “Since we implemented the Tumbleweed Email Firewall, it has identified over 1,000 outbound emails that contained PHI and has funneled them through a secure email channel. In addition, the Tumbleweed Email Firewall has slashed spam rates, reduced administrator time, reduced network bandwidth and server loads, and has significantly improved user productivity.”

About Arkansas Children's Hospital
Arkansas Children's Hospital is dedicated to enhancing, sustaining and restoring children's health and development. The hospital is the only pediatric medical center in Arkansas, and is one of the largest in the United States serving children from birth to age 21. Arkansas Children's Hospital’s health care facility has an international reputation for medical breakthroughs and intensive treatments, unique surgical procedures and forward-thinking medical research.

About Tumbleweed
A leading global email security company with more than 10 years in the business, Tumbleweed provides one of the deepest product lines and the most developed e-mail security architecture available. From our e-mail security suite, point solutions for spam, inbound and outbound filtering, to secure data encryption and certificate authentication, Tumbleweed has the solution enterprises and governments need to mitigate risk and increase network bandwidth. 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.

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 performance of Tumbleweed’s Email Firewall solution. 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 15, 2004, Form 10-Q filed May 10, 2004, and Form 10-Q filed August 12, 2004.

Tumbleweed assumes no obligation to update information contained in this press release, including for example its guidance regarding its future performance, 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 the Company's website or elsewhere, its continued availability does not indicate that the Company is reaffirming or confirming any of the information contained herein.

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