New Tumbleweed MailGate 6500 E-mail Security Appliance Can Process Over 1 Million Messages an Hour

High-performance appliance delivers the industry’s most complete solution for enterprise e-mail security

Redwood City, CA -- July 11, 2006 -- Tumbleweed® Communications Corp. today unveiled its new high-performance MailGate® 6500 e-mail security appliance. This advanced appliance can process over one million messages per hour and offers a comprehensive solution for policy-based e-mail security. The MailGate Appliance™ 6500 sets new standards for performance, enterprise scalability, and ease-of-use, allowing companies to lower costs by consolidating on fewer appliances and security point-solutions.

“Organizations are increasingly moving toward [using] fewer products that provide more comprehensive security,” said Brian Burke, Research Manager for IDC. “A challenge facing today’s enterprise-class organizations is finding an appliance that provides high performance, scalability and reduces the cost of ownership. Vendors that can effectively address the changing security needs of today’s enterprise organizations will be best positioned to lead the market.”

Many organizations are shifting to all-in-one security appliances to address their needs for lower costs, higher performance, easier deployment, tighter security, and greater scalability. The MailGate Appliance 6500 features dual multi-core 2.4 Ghz Opteron processors with internal redundancy, hot-swappable disk drives and power supplies, and over 1.5 terabytes of storage capacity. This new appliance includes Tumbleweed’s unique front panel LCD and easy configuration controls, which enable rapid network setup, display status information, and allow appliance reset with no external cabling or monitors.

The Tumbleweed MailGate Appliance 6500 delivers additional integrated features that include:

  • Virus Outbreak Protection providing zero-hour defense against new virus attacks

  • Advanced anti-spam eliminating over 99% of unwanted mail with virtually no false positives (0% false positives according to the VeriTest Anti-Spam Benchmark Service, Fall 2005)

  • Processing power of more than 1 million messages per hour: Bi-directional content inspection with advanced and intuitive policy controls

  • Enterprise-class scalability with clustering between data centers, per-domain routing and replicated policy configuration

  • Advanced rules-based TLS encryption providing policy-based secure message delivery

  • Multi-language support for end-user spam management controls

About the Tumbleweed MailGate Product Suite

The Tumbleweed MailGate Product Suite is a family of products for protecting, filtering, and monitoring corporate e-mail. The products enable businesses to manage inbound and outbound traffic, block threats, encrypt messages, and optimize network performance. MailGate products include MailGate Appliance, MailGate E-mail Firewall™ software and MailGate Secure Messenger software™, each optimized for specific environments and security challenges.

About Tumbleweed

Tumbleweed provides security solutions for e-mail 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™, 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. Validation Authority is the world-leading solution for determining the validity of digital certificates. For additional information about Tumbleweed go to or call 650-216-2000.

Tumbleweed, the Arrows logo, MailGate, MailGate Appliance, MailGate E-mail Firewall, MailGate Secure Messenger, 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.

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 the functionality and performance of Tumbleweed’s products. 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 May 10, 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.

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