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Zix Corporation's ZixDirectory(TM) Marks Industry Record with 10 Million Email Encryption Members


World's largest email encryption directory accelerates growth

DALLAS, March 5 /PRNewswire-FirstCall/ -- Zix Corporation (ZixCorp(R)), (Nasdaq: ZIXI), the leader in hosted services for email encryption and e-prescribing, today announced that its ZixDirectory, the foundation of ZixCorp's outsourced email encryption service, marked an industry first: 10 million members. The ZixDirectory members represent everyone who sends or receives encrypted email using ZixCorp's Email Encryption Service. The growth rate of the ZixDirectory has increased over the last 18 months from an average of 45,000 new members per week to an average of over 70,000 new members per week since the beginning of 2008.

ZixDirectory connects all ZixCorp customers for seamless, transparent, and secure email. There are more than 1,000 hospitals in the directory, more than 30 Blues organizations, 500 financial institutions, the federal banking regulators, 19 state banking regulatory agencies and a growing number of federal, state and county governments. These customers, plus many more, secure email among themselves with no need for user intervention.

"ZixDirectory offers the perfect solution for securing email to protect the communication of sensitive data -- beyond its ease of implementation, it offers flexible delivery options that are compatible with any recipient's needs, ensuring that we are both productive and compliant," said Don Smith, information security officer for STAR Financial Group, the parent company of STAR Financial Bank with more than $1.4 billion in assets and 40 banking centers in Indiana. "Through ZixDirectory, we can seamlessly and securely exchange protected information with our financial regulators, all of which utilize ZixCorp email encryption for secure communications."

"ZixDirectory is the core of our Email Encryption Service," said Nigel Johnson, vice president of business development and product management for ZixCorp. "Our system architecture was specifically built to connect communities of interest. Less sophisticated systems create secure silos, which is like having a separate telephone for every one of your friends. Like an advanced phone network, ZixDirectory ties our customers together creating simple connectivity for everyone from just one service. Both our existing and prospective users benefit from the 'network effect,' where the value of the ZixDirectory grows exponentially as we add new members."

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 http://www.zixcorp.com.

SOURCE Zix Corporation

CONTACT: Public Relations, Farrah Corley, +1-214-370-2175, publicrelations@zixcorp.com, or Investor Relations, Peter Wilensky, +1-214-515-7357, invest@zixcorp.com, both of Zix Corporation