Viking Range Cooks Spam With Tumbleweed MailGate Appliance; MailGate Email Security Solution Provides an Effective, Highly Scalable and Customizable Defense Against Email Threats

Viking is a pioneer of ultra-premium, commercial-type appliancesfor the indoor and outdoor kitchen. Like many organizations today,Viking struggled to protect its employees against spam, viruses andother email-related threats. Prior to deploying the TumbleweedMailGate email security product suite, Viking was using another emailsecurity solution, but had been plagued by configuration issues and alack of timely spam definition updates, resulting in an ineffectiveemail protection solution. Poor spam protection led to an increase inload on Viking's network, as email servers struggled to manage thehigh volume of unblocked spam. The unwanted email messages atehard-drive space and created a strain on IT resources.

"Prior to deploying Tumbleweed's MailGate email security productsuite, we were fighting a constant barrage of spam on a daily basis,"said Vik Sharma, Network Administrator, Viking Range. "As soon as weinstalled the MailGate Appliance(TM), the spam stopped. The resultswere like night and day in comparison to our previous solution. Basedon our research of leading industry analyst reports, input from ourtechnology partners and feedback from current Tumbleweed customers, wefelt very confident in selecting Tumbleweed to help us address ouremail security needs."

Viking worked with technology partner Flat Earth Networking, anexpert consultancy specializing in network security, to research themost appropriate security suite to meet its unique specifications.Flat Earth Networking worked with Viking to carefully determine whichemail security solution would not only address their spam problems butalso provide security technology that grows with the organization andmeets its changing needs. Tumbleweed's MailGate email security productsuite was the clear choice.

"We only do network security, and our reputation is built onworking with and recommending the best security technologiesavailable," said Dave Wilson of Flat Earth Networking. "Tumbleweed isrecognized as an innovator and leader in the email security space. Weare confident that Tumbleweed's MailGate email security product suitewill give our customers the best possible protection against today'semail security threats."

Since implementing Tumbleweed's MailGate email security productsuite, Viking's user productivity has increased significantly.Tumbleweed's MailGate email security product suite blocks spam beforeit can reach Viking's email servers and user inboxes, preventinginternal disruptions. Tumbleweed's MailGate email security productsuite scans nearly 200,000 inbound emails per week, or over 8 milliona year for Viking. IT administrators can also rely on Tumbleweed'santi-spam service which constantly updates spam definitions, savingtime and freeing up IT resources.

"With the volume of spam showing no signs of slowing down,organizations like Viking are facing a daunting task ofcost-effectively eliminating email-related threats," said WillyLeichter, Director, Product Marketing for Email Security atTumbleweed. "Our goal is to provide customers like Viking withcomprehensive and easy-to-manage solutions to combat today's emailthreats while continually adapting to protect against new threats thatmay emerge tomorrow."

About the Tumbleweed MailGate Product Suite

The Tumbleweed MailGate Product Suite is a family of products forprotecting, filtering and monitoring corporate email. Thesebest-in-breed products enable businesses to manage inbound andoutbound traffic, block threats, encrypt messages and optimize networkperformance. MailGate products include MailGate Appliance, MailGateEmail Firewall(TM) software and MailGate Secure Messenger(TM)software, each optimized for specific environments and securitychallenges.

-- MailGate Appliance: A powerful and easy-to-deploy hardened Linux appliance, providing integrated network edge defense, antispam, antivirus, content filtering, policy management, and outbound encryption.

-- MailGate Email Firewall: A comprehensive email security software offering, with functionality ranging from inbound threat prevention to outbound content filtering, monitoring and encryption.

-- MailGate Secure Messenger: A policy-based, secure message-delivery solution that inspects incoming and outgoing mail and dynamically applies user-defined encryption and routing preferences.

Safe Harbor Statement

Tumbleweed cautions that forward-looking statements contained inthis press release are based on current plans and expectations as ofthe date of this press release, and that a number of factors couldcause the actual results to differ materially from the guidance givenat this time. These factors are described in the Safe Harbor statementbelow.

Except for the historical information contained herein, thematters discussed in this press release may constitute forward-lookingstatements that involve risks and uncertainties that could causeactual results to differ materially from those projected, particularlywith respect to Viking's continued use of Tumbleweed's products andservices, as well as the functionality and performance of Tumbleweed'sproducts. In some cases, forward-looking statements can be identifiedby terminology such as "may," "will," "should," "potential,""continue," "expects," "anticipates," "intends," "plans," "believes,""estimates," and similar expressions. For further cautions about therisks of investing in Tumbleweed, we refer you to the documentsTumbleweed files from time to time with the Securities and ExchangeCommission, particularly Tumbleweed's Form 10-K filed March 16, 2006and Form 10-Q filed May 10, 2006.

Tumbleweed assumes no obligation to update information containedin this press release. Although this release may remain available onTumbleweed's website or elsewhere, its continued availability does notindicate that Tumbleweed is reaffirming or confirming any of theinformation contained herein.

About Viking Range

Viking is a privately held company which manufactures and marketsthe industry's finest professional kitchen appliances for the home.Viking is the originator of the "Professional" segment of majorappliances in the USA, introducing the first commercial-type range forhome use in 1987. The company now offers two distinctive, completelines of ultra-premium appliances, including cooking, ventilation,kitchen clean-up and refrigeration, as well as outdoor products toextend the Viking Kitchen to the pool or patio. For more information,please visit www.vikingrange.com.

About Flat Earth Networking

Flat Earth provides network security solutions to protect valuableinformation and data assets for our clients. Since 1996, we haveprovided mid- to large-sized businesses an authoritative approach tonetwork security that includes superior enterprise products andeffective problem-solving. With our team of security experts, FlatEarth strengthens existing technical departments with the knowledgeand manpower required to support and protect the vulnerable areas ofinformation networks before problems happen. For more information,please visit www.flatearth.net.

About Tumbleweed Communications Corp.

Tumbleweed provides security solutions for email protection, filetransfers, and identity validation that allow organizations to safelyconduct business over the Internet. Tumbleweed offers these solutionsin three comprehensive product suites: MailGate, SecureTransport(TM),and Validation Authority(TM). MailGate provides protection againstspam, viruses, and attacks, and enables policy-based messagefiltering, encryption, and routing. SecureTransport enables businessto safely exchange large files and transactions without proprietarysoftware. Validation Authority is the world-leading solution fordetermining the validity of digital certificates. Tumbleweed'senterprise and government customers include ABN Amro, Bank of AmericaSecurities, Catholic Healthcare West, JP Morgan Chase & Co., TheRegence Group (Blue Cross/Blue Shield), St. Luke's EpiscopalHealthcare System, the U.S. Food and Drug Administration, the U.S.Department of Defense, and all four branches of the U.S. Armed Forces.Tumbleweed was founded in 1993 and is headquartered in Redwood City,Calif. For additional information about Tumbleweed go towww.tumbleweed.com or call 650-216-2000.

Tumbleweed, the Arrows logo, MailGate, MailGate Appliance,MailGate Email Firewall, MailGate Secure Messenger, SecureTransportand Validation Authority are either registered trademarks ortrademarks of Tumbleweed Communications Corp. in the United Statesand/or other countries. All other trademarks are the property of theirrespective owners.