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ZIX CORPORATION (Exact Name of Registrant As Specified in Its Charter)

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ZIX CORPORATION (Exact Name of Registrant As Specified in Its Charter) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 21, 2011 ZIX CORPORATION (Exact name of registrant as specified in its charter) Texas 0-17995 75-2216818 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 2711 North Haskell Avenue Suite 2200, LB 36 Dallas, Texas 75204-2960 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: (214) 370-2000 Not Applicable (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers. (d) On July 21, 2011, the Board of Directors of Zix Corporation (“Company”) elected Dr. Taher Elgamal as a Director and member of the Board of Directors, effective July 26, 2011. A copy of the Company’s press release announcing the election of Dr. Elgamal is attached as Exhibit 99.1. There was no arrangement or understanding between Dr. Elgamal and any other person pursuant to which he was selected as a Director. The Board of Directors has not determined whether it expects to appoint Dr. Elgamal to any committee of the Board of Directors. Pursuant to the Company’s 2006 Directors’ Stock Option Plan, on the effective date of his first election to the Board of Directors, Dr. Elgamal was automatically granted nonqualified options to purchase 25,000 shares of the Company’s common stock. The options vest quarterly and pro-rata over one year from the grant date, and the exercise price is 100% of the closing common stock price on the grant date. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 99.1 Press Release, dated July 26, 2011, titled “Dr. Taher Elgamal Joins Zix Corporation’s Board of Directors.” SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ZIX CORPORATION (Registrant) Date: July 26, 2011 By: /s/ James F. Brashear James F. Brashear Vice President, General Counsel and Corporate Secretary INDEX TO EXHIBITS Exhibit No. Description 99.1 Press Release, dated July 26, 2011, titled “Dr. Taher Elgamal Joins Zix Corporation’s Board of Directors.” Exhibit 99.1 Press Release | For Distribution Dr. Taher Elgamal Joins Zix Corporation’s Board of Directors DALLAS — July 26, 2011 — Zix Corporation (ZixCorp), (Nasdaq: ZIXI), the leader in email encryption services, announced today the election of Taher Elgamal, Ph.D. to the Company’s board of directors. Dr. Elgamal joins the board with abundant experience as an internationally respected information security leader and cryptography expert. Dr. Elgamal is a recipient of the RSA Conference 2009 Lifetime Achievement Award, and he is recognized as the “father of SSL,” the Internet security standard Secure Sockets Layer. Dr. Elgamal also invented several industry and government standards in data security and digital signatures, including the Digital Signature Standard (DSS). “Dr. Elgamal is a brilliant inventor and leader, who has dramatically improved the field of data security,” said Rick Spurr, Chairman and Chief Executive Officer of ZixCorp. “We look forward to leveraging Dr. Elgamal’s wealth of experience and knowledge as ZixCorp strives to enhance its industry-leading email encryption and expand its market reach.” Currently, Dr. Elgamal serves as Founder of IdentityMind, Inc. and as CSO for Axway, Inc. He has also held several executive roles at technology and security companies, including CTO of Tumbleweed Communications from 2006 to 2008, CTO of Securify, Inc. from 2001 to 2004, CEO and president of Securify, Inc. from 1998 to 2001 and chief scientist of Netscape Communications from 1995 to 1998. In addition, Dr. Elgamal has served on the boards of five public companies and several private companies. Dr. Elgamal was issued several patents in online security, payments and data compression. He received a bachelor’s degree in electrical engineering from Cairo University, a master’s degree in electrical engineering from Stanford University and a doctorate in electrical engineering from Stanford University. About Zix Corporation Zix Corporation (ZixCorp) provides the only email encryption services designed with your most important relationships in mind. The most influential companies and government organizations use the proven ZixCorp® Email Encryption Services, including WellPoint, Humana, the SEC and more than 1,200 hospitals and 1,500 financial institutions. ZixCorp Email Encryption Services are powered by ZixDirectory®, the largest email encryption community in the world. The tens of millions of ZixDirectory Zix Corporation | 2711 N. Haskell Ave. | Suite 2200, LB 36 | Dallas, TX 75204 | Telephone: 214-370-2000 | Fax: 214-370-2070 | www.zixcorp.com members can feel secure knowing their most important relationships are protected. For more information, visit www.zixcorp.com. ### ZixCorp Contacts: Investor Relations: Charles Messman (323) 468-2300, [email protected] Public Relations: Taylor Stansbury Johnson (214) 370-2134, [email protected] Zix Corporation | 2711 N. Haskell Ave. | Suite 2200, LB 36 | Dallas, TX 75204 | Telephone: 214-370-2000 | Fax: 214-370-2070 | www.zixcorp.com 2.
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