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Zix Corporation Selected by McQueary Henry Bowles Troy for Email Encryption Services; North Texas' Largest Independent Insurance Firm Opts for Three-Year ZixVPM(R), ZixPort(R) Contract

DALLAS--(BUSINESS WIRE)--May 18, 2006--Zix Corporation (ZixCorp(R)) (Nasdaq:ZIXI) the leader in hosted services for email encryption and e-prescribing, today announced that McQueary Henry Bowles Troy, L.L.P. (MHBT), one of the largest privately owned insurance and risk management firms in the United States has signed a three-year contract for ZixVPM (Virtual Private Messenger) and ZixPort email encryption services.

ZixVPM will enforce MHBT's email security policies to ensure secure handling of sensitive data for 300 users. The service includes pre-configured lexicons that automatically detect and encrypt emails containing financial data and protected health information (PHI) to help comply with privacy rules of GLBA and HIPAA. ZixPort provides custom branding and encrypted messaging functionality to the organization's Web site.

"Many of our customers and carriers are already ZixCorp users, which made it an easy choice," said Mike Harris, director of information technology for MHBT. "We take protection of private data seriously and plan to install a second ZixVPM device to ensure encryption will occur even if our primary Internet connection goes down."

Based in Dallas, MHBT has been ranked among the Top 100 Brokers in the United States by Business Insurance from 2000-2005, one of the 50 Best Companies to Work For in Texas by Texas Monthly in 2006, and recognized as one of the Best Places to Work in Dallas-Fort Worth by Dallas Business Journal from 2003-2006.

"Last month, smaller health plans had to meet a HIPAA security deadline to ensure that covered entities protect PHI in their email, and this event has helped fuel our increase in email encryption customers," said Rick Spurr, chief executive officer for ZixCorp. "Having firms such as MHBT join the network of email encryption users makes communications and interoperability in the healthcare community easy and secure."

About MHBT

MHBT is based in Dallas and also has offices in Fort Worth and Austin, Texas. MHBT and its precursors have offered global insurance, bonds, and financial services since 1927. The firm offers commercial risk management and insurance services, employee benefits, and financial services, construction bond services, property and casualty insurance, personal insurance, and surety and specialized services. For the past five years, Business Insurance has ranked MHBT as one of the top 100 commercial insurance firms in the United States. For more information, visit the firm's Web site at

About Zix Corporation

Zix Corporation (ZixCorp(R)) is the leading provider of hosted email encryption and e-prescribing services. ZixCorp's email encryption services provide an easy and cost-effective way to ensure customer privacy and regulatory compliance for corporate email. Its PocketScript(R) e-prescribing service reduces costs and improves patient care by automating the prescription process between payers, doctors, and pharmacies. For more information, visit

CONTACT: Zix Corporation, Dallas
Public Relations:
Farrah Corley, 214-370-2175
Investor Relations:
Peter Wilensky, 214-515-7357
MHBT Contact:
Cooksey Communications
Molli Samuels, 972-580-0662

SOURCE: Zix Corporation