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Zix Corporation Maintains Strong Leadership with Landmark Achievements

Company Processes More Than 12 Million e-Prescriptions and ZixDirectory(TM) Surpasses 8 Million Members

DALLAS--(BUSINESS WIRE)--May 30, 2007--Zix Corporation (ZixCorp(R)), (Nasdaq:ZIXI), the leader in email encryption and e-prescribing services, today announced the Company has achieved industry milestones in each of its business segments - Email Encryption and e-Prescribing. The Company processes prescription transactions and hosts public encryption keys in ZixDirectory(TM) through the ZixData Center(TM), a SysTrust(TM) certified and SAS-70 accredited center. "These milestones demonstrate the continued success and leadership that we have in these growing markets," said Rick Spurr, ZixCorp's chief executive officer. "These two businesses are revolutionizing the timely and secure delivery of sensitive information, which we believe will become increasingly important in the information society."


ZixCorp's pioneering PocketScript(R) e-prescribing service has processed 2.9 million e-scripts for 2007, bringing the total number processed to over 12 million and growing at a rate of 140,000 e-scripts per week. PocketScript enables physicians to order prescriptions through a secure wireless mobile PDA or secure Web site and deliver them electronically to retail or mail order pharmacies. ZixCorp is successfully introducing this life-saving technology to smaller physician practices that otherwise may not have the time, money or resources to invest in new electronic applications. Over 3,000 physicians across seven payor-sponsored e-prescribing programs throughout the U.S. actively use PocketScript to improve patient safety, bring greater efficiency into the physician's office and lower overall healthcare costs.

"Industry milestones in and around e-prescribing provide proof that the market is making progress and we are moving closer to broad adoption. Especially in small physician offices where most doctors practice today, e-prescribing may become the platform for additional functionality in the future," said Cynthia E. Burghard, research director for Gartner. "In markets where payor sponsorship has taken place, there has been greater success in the deployment and utilization of e-prescribing. To continue fueling adoption, more payors need to step up to the plate in order to reach critical mass for this needed technology."

Email Encryption:

ZixCorp's hosted Email Encryption Service is powered by the ZixDirectory, the industry's largest global directory of email recipients containing influential healthcare, financial services and government institutions, which has now surpassed eight million members and is growing at more than 60,000 new protected email addresses per week. The directory provides a centralized key exchange, allowing seamless delivery and receipt of encrypted emails. Every new address provides incremental value to the current members of the directory, which makes ZixCorp's Email Encryption Service more attractive to the next customer while maintaining the Company's high retention rate for existing ones.

In Forrester Research's April 2007 report, "You've Got Encrypted Email," principal analyst Paul Stamp writes, "ZixCorp's big differentiator is access to a managed directory of ZixCorp users, thus creating 'communities of interest' of partner organizations that can exchange email relatively seamlessly."

About Zix Corporation

ZixCorp is the leading provider of easy-to-use-and-deploy email encryption and e-prescribing services that Connect entities with their customers and partners to Protect and Deliver sensitive information in the healthcare, finance, insurance and government industries. ZixCorp's hosted Email Encryption Service provides an easy and cost-effective way to ensure customer privacy and regulatory compliance for corporate email. Its PocketScript(R) e-prescribing service saves lives and saves money by automating the prescription process between payors, doctors and pharmacies. For more information, visit

Public Relations:
Farrah Corley, 214-370-2175
Investor Relations:
Peter Wilensky, 214-515-7357

SOURCE: Zix Corporation