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Zix Corporation Ranks 73 on the 2005 Deloitte Technology Fast 500 List; Company Recognized Nationally for Rapid Revenue Growth

DALLAS--(BUSINESS WIRE)--Oct. 19, 2005--Zix Corporation (ZixCorp(R)) (Nasdaq:ZIXI), a global provider of secure e-messaging and e-prescribing solutions and services, today announced that it ranked 73 on the 2005 Deloitte Technology Fast 500, a listing of the 500 fastest growing technology companies in North America. Rankings are based on the percentage of revenue growth over five years, from 2000-2004. ZixCorp grew 3,486 percent during this period.

ZixCorp's CEO, Rick Spurr, credits robust easy-to-use solutions, customer demand, and a customer-focused team for the company's strong growth. "ZixCorp is well positioned for continued success in our two high-growth markets: secure e-mail and e-prescribing. With the support of our valued customers and employee dedication, ZixCorp has achieved impressive market leadership," said Spurr.

In addition to making the 2005 Deloitte Technology Fast 500, ZixCorp ranked eighth on the Texas Crescent Technology Fast 50, which lists the 50 fastest growing technology firms in Texas.

"Being one of the 500 fastest growing technology companies in North America is an impressive accomplishment. We commend ZixCorp for making the Deloitte Technology Fast 500 with a phenomenal 3,486 percent growth rate over five years," said Tony Kern, deputy national managing principal of Deloitte's Technology, Media & Telecommunications industry practice.

Overall, companies that ranked on the 2005 Deloitte Technology Fast 500 had growth rates ranging from 240 to 73,752 percent over five years, with an average growth rate of 2,408 percent.

Fast 500 Selection and Qualifications

The Fast 500 list is compiled from Deloitte's 15 regional North American Fast 50 lists, nominations submitted directly to the Fast 500, and public company database research. To qualify for the Fast 500, entrants must have had 2000 operating revenues of at least $50,000 USD or $75,000 CD for the United States and Canada, respectively, and 2004 operating revenues of at least $1 million USD or CD.

Entrants must be headquartered in North America and must be a "technology company," defined as a company that owns proprietary technology that contributes to a significant portion of the company's operating revenues; or devotes a significant proportion of revenues to the research and development of technology. Using other companies' technologies in a unique way does not qualify.

About Deloitte

Deloitte refers to one or more of Deloitte Touche Tohmatsu, a Swiss Verein, its member firms, and their respective subsidiaries and affiliates. As a Swiss Verein (association), neither Deloitte Touche Tohmatsu nor any of its member firms has any liability for each other's acts or omissions. Each of the member firms is a separate and independent legal entity operating under the names "Deloitte," "Deloitte & Touche," "Deloitte Touche Tohmatsu," or other related names. Services are provided by the member firms or their subsidiaries or affiliates and not by the Deloitte Touche Tohmatsu Verein.

Deloitte & Touche USA LLP is the U.S. member firm of Deloitte Touche Tohmatsu. In the U.S., services are provided by the subsidiaries of Deloitte & Touche USA LLP (Deloitte & Touche LLP, Deloitte Consulting LLP, Deloitte Financial Advisory Services LLP, Deloitte Tax LLP and their subsidiaries), and not by Deloitte & Touche USA LLP.

About Zix Corporation

Zix Corporation (ZixCorp(R)) provides easy-to-use-and-deploy e-communication services that protect, manage, and deliver sensitive information to enterprises and consumers in healthcare, finance, insurance, and government. ZixCorp's eSecure services enable policy-driven e-mail encryption, content filtering, and send-to-anyone capability while its eHealth service improves patient care, reduces costs, and improves efficiency through an e-prescribing solution. For more information, visit

CONTACT: Zix Corporation, Dallas
Public Relations:
Christa Osswald, 214-370-2175
Investor Relations:
Peter Wilensky, 214-515-7357

SOURCE: Zix Corporation