JOINT FILING AGREEMENTJoint Filing Agreement • October 24th, 2012 • Rockall Emerging Markets Master Fund LTD • Services-computer processing & data preparation
In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, each of the undersigned hereby agrees to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Common Stock, par value $0.01 per share, of Zix Corporation. This Joint Filing Agreement shall be filed as an Exhibit to such Statement.
