Tumbleweed Press Releases

TUMBLEWEED NAMED FINALIST FOR TWO EMAIL SECURITY AWARDS BY SC MAGAZINE

Tumbleweed MailGate and Tumbleweed Email Firewall Short-listed For Best Anti Spam and Best Content Filtering Solutions in 2005 SC Global Awards

Redwood City, CA — December 22, 2004 — Tumbleweed® Communications Corp. (NASDAQ: TMWD), a leading provider of e-mail and file transfer security solutions announced today that its anti-spam and content filtering solutions are SC Magazine 2005 Global Award finalists. Tumbleweed MailGate, Tumbleweed’s hardened email security appliance, has been recognized in the Best Anti Spam Product category, and Tumbleweed Email Firewall, Tumbleweed’s comprehensive enterprise email security solution, has been named in the Best Content Filtering Category.

“We are delighted to be finalists for SC Magazine’s Anti-Spam and Content Filtering Reader Trust awards,” said Jeffrey Smith, President and CEO, Tumbleweed. “Our placement reinforces both the breadth and depth of our email security offering, and we’d like to thank SC Magazine readers and judges for recognizing our products.”

Winners will be announced during the RSA Conference on February 16th, 2005 at the Moscone Center in San Francisco, CA. For more details on the awards, and a list of the finalists in all categories, please visit the official SC Awards site: http://www.scawards.com/finalists.asp.

About Tumbleweed MailGate
Tumbleweed MailGate is a top-rated, hardened email security appliance that provides spam and virus protection through Tumbleweed’s proprietary Intent Based Filtering™ (IBF™) technology. Tumbleweed MailGate employs artificial intelligence to determine the intent of an email and then act upon that intent. IBF technology has proven to be effective with 95% filtering and extremely low false positives, easy to update, and inexpensive to maintain. Tumbleweed MailGate also provides junk, legitimate, and bulk email categories to give users more control over how their email is categorized.

About Tumbleweed Email Firewall
Tumbleweed Email Firewall has been recognized as having the best email security product functionality by META Group, and was rated the #1 enterprise software solution for fighting spam, according to Network World (http://www.nwfusion.com/reviews/2003/0915spam.html). 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. Tumbleweed Email Firewall is used by more than 650 of the world's largest, most demanding messaging infrastructures, and is available in both appliance and software editions.

About Tumbleweed Communications Corp.
A leading e-mail security, file transfer security and Identity Validation company with more than 10 years in the business, Tumbleweed provides comprehensive solutions for managing mission critical data communication channels. From our e-mail security suite, point solutions for Spam, inbound and outbound filtering, to secure file transfer and certificate authentication, Tumbleweed has a variety of solutions currently used by enterprises and governments to help 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), St. Luke's Episcopal Healthcare System, the US Food and Drug Administration, and the US Navy and Marine Corps. 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.

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 the performance and characteristics of Tumbleweed’s MailGate and Email Firewall solutions. 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, Form 10-Q filed August 12, 2004, and Form 10-Q filed November 9, 2004.

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 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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