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Zix Corporation to Participate in The Open Group's S/MIME Gateway Certification Program; International Consortium Developing Standards for Email Security Protocol

DALLAS--(BUSINESS WIRE)--July 20, 2004--Zix Corporation (ZixCorp(R)), (Nasdaq:ZIXI), a global provider of e-messaging protection and transaction services, today announced that it will participate in an S/MIME (Secure Multipurpose Internet Mail Extensions) certification program established by The Open Group, a technology-neutral consortium committed to business efficiency and interoperability.

The Open Group's S/MIME interoperability initiative creates an industry-standard certification program for interoperable products that encrypt email at enterprise boundaries for transmission over the Internet. The overall goal of the certification program is to assist in the creation of a global secure messaging environment which is vendor-product neutral.

To comply with the proposed certification standards set by The Open Group, ZixCorp has created an S/MIME-compatible add-on to its ZixVPM(R) (Virtual Private Messenger) enterprise-wide encryption service. This enhancement will permit customers to support interoperability with partners who have implemented S/MIME certified products from other vendors. The product will be certified by The Open Group after testing is completed in the third quarter of this year.

"We are happy to participate in The Open Group's efforts to establish a certification program for gateway-to-gateway communication," said Rick Spurr, president and chief operating officer for ZixCorp. "One of the core strengths of ZixCorp is interoperability, and complying with new standards and new developments is part of our holistic strategy to make sure secure email is accessible to everyone, no matter what technology or protocol they may use."

About The Open Group

The Open Group is a vendor-neutral and technology-neutral consortium, whose vision of Boundaryless Information Flow(TM) will enable access to integrated information within and between enterprises based on open standards and global interoperability. The Open Group works with customers, suppliers, consortia and other standard bodies. Its role is to capture, understand and address current and emerging requirements, establish policies and share best practices; to facilitate interoperability, develop consensus, and evolve and integrate specifications and open source technologies; to offer a comprehensive set of services to enhance the operational efficiency of consortia; and to operate the industry's premier certification service.

Further information on The Open Group can be found at

About Zix Corporation

Zix Corporation (ZixCorp(R)) is a global provider of e-messaging protection and transaction services. ZixCorp offers a range of solutions to protect organizations from viruses, spam, and electronic attack, as well as enabling secure electronic communications, such as email encryption, e-prescribing, on-line doctor visits, and electronic lab results. ZixCorp helps organizations of any size to streamline operations, reduce risks, and leverage the efficiencies of e-messaging. For more information, visit

CONTACT: Zix Corporation, Dallas
Public Relations:
Kim Tompkins, 214-515-7338
Investor Relations:
Peter Wilensky, 214-515-7357

SOURCE: Zix Corporation