ZIX CORPORATION CHARTER OF THE AUDIT COMMITTEE OF THE BOARD OF DIRECTORS I. PURPOSE. The purpose of the Audit Committee (the “Committee”) is to assist the Board of Directors (the “Board”) of Zix Corporation (the “Company”) in fulfilling its oversight responsibilities by reviewing the financial information which will be provided to the stockholders and others; reviewing the systems of internal controls which management and the Board have established; appointing, compensating, retaining and overseeing the performance of independent accountants engaged for the purpose of preparing or issuing an audit report or performing other audit, review or attest services for the Company; and overseeing the Company’s accounting and financial reporting processes and the audits of the Company’s financial statements. In carrying out these responsibilities, the Committee will conduct the following activities: A. Reviewing and inquiring into the conduct and integrity of the Company’s financial reporting process; B. Reviewing the periodic reports prepared by the Company for filing with the Securities and Exchange Commission (the “Commission”); C. Reviewing and inquiring into the performance of the Company’s systems of internal accounting and financial controls and audit function; D. Engaging the Company’s independent auditors and reviewing and inquiring into the performance, qualifications, compensation and independence of the Company’s independent auditors, their ...