TMWD Tumbleweed Communications Corp (MM)

Tumbleweed(R) Communications Corp. (NASDAQ:TMWD), a leading provider of email security, file transfer security, and identity validation software and appliances, has announced that John Thielens, CTO of Tumbleweed, will be among a select group of industry experts participating at the Email Authentication Implementation Summit on July 12, 2005. The event is being held at Marriott Marquis in New York City, and will be attended by email and security experts, Internet Service Providers and brand representatives, among others. Thielens will serve as part of an executive roundtable wrapping up the day's events to share final thoughts and offer direction on industry authentication issues. Moderated by Esther Dyson, this final session will also include representatives from Symantec, Microsoft, and others. The Email Authentication Implementation Summit 2005 is a cross-industry collaborative initiative to improve the security and reliability of email and to protect customers, users and online brands from the persistent threats of spam, phishing and email fraud. More event information can be found at: http://emailauthentication.org/ About The Email Authentication Implementation Summit 2005 The Email Authentication Implementation Summit 2005 is the product of several industry-leading organizations coming together to implement self-regulatory standards to assist in furthering the exploration of solutions to stem the tides of spam and other e-mail-related security threats. The event was conceptualized by the steering committee: Bigfoot Interactive, the Direct Marketing Association, the Email Service Provider Coalition, Microsoft, Symantec and Sendmail. More information may be found at http://emailauthentication.org. About Tumbleweed Communications Corp. Tumbleweed provides security products for email protection, file transfers, and identity software and appliances that allow organizations to safely conduct business over the Internet. Tumbleweed offers these products in three comprehensive suites: MailGate, SecureTransport, and Validation Authority. 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. The 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 US Food and Drug Administration, the US Department of Defense, and all four branches of the US 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. 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 leadership in the authentication space. 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, 2005 and Form 10-Q filed May 10, 2005. 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.