ZixIt Corporation Signs ZixMail Enterprise Agreement with Fulbright & Jaworski L.L.P.

DALLAS--(BUSINESS WIRE)--April 5, 2000--ZixIt Corporation (Nasdaq:ZIXI), developer of the ZixMail(TM) secure document delivery, private email, and message tracking service, announced today that Fulbright & Jaworski L.L.P., one of the largest law firms in the United States, has chosen the ZixMail secure messaging service to transmit and receive confidential legal documents and private email messages.

ZixMail does not require companies to run their own "certificate authorities," which issue and store digital identities and public keys. Instead, ZixMail utilizes a centralized, automated, real-time certificate authority, the ZixIt Worldwide Signature Server, which has the capacity to store and to distribute public keys for every email address in the world. This infrastructure eliminates the burdensome task of trying to keep track of hundreds or thousands of keys.

Jack M. Vaughan, Administrative Partner at Fulbright & Jaworski, said, "We have been using another product for a while, but we have a need for a simpler solution for many of our clients. We have looked at a lot of different "secure email" solutions and we have found that ZixMail really fits our needs. Our attorneys and clients worldwide want to make sure that confidential documents and email messages remain private and secure. Considering the size and international breadth of our practice, ZixMail's ease of use, impassable security, and inexpensive cost structure make it an attractive choice for secure document delivery and private messaging on the Internet."

Doug Kramp, chief executive officer of ZixMail.com, Inc. said, "Fulbright & Jaworski is one of the largest and most respected law firms in the United States. The firm's impressive size and worldwide presence in major business, financial, and governmental centers presents an important opportunity to ZixMail.com for the continued broadening of our customer base."

Fulbright & Jaworski L.L.P., founded in 1919, is an international, full-service law firm. With approximately 750 attorneys, Fulbright & Jaworski is one of the largest law firms in the United States. The firm has offices in Houston, Austin, Dallas, and San Antonio, Texas; Los Angeles; New York; Washington, D.C.; Minneapolis; Hong Kong; and London. The firm's comprehensive practice covers the widest possible range of legal matters, from local litigation to complex international transactions. For further information, visit www.fulbright.com.

ZixIt Corporation provides products and services that enhance security, privacy, and convenience on the Internet. ZixIt's flagship product, ZixMail(TM), is a secure document delivery, private email, and message tracking service that enables users worldwide to easily send and receive encrypted and digitally signed communications using their existing email systems and addresses. ZixIt is also developing ZixCharge(TM) -- a shopping portal and Internet payment authorization system. For further information, visit www.zixit.com or contact investor relations at 972/702-7057.

    CONTACT: ZixIt Corporation, Dallas 
             Beverly V. Fuortes, 972/702-7057