| Information About Our 2021 Virtual Annual Meeting of Shareholders |
| Date: | Wednesday, June 9, 2021 |
| Time: | 10:00 a.m. Central Time |
| To participate in the virtual Annual Meeting, visit http://www.virtualshareholdermeeting.com/ZIXI2021 | |
| We are furnishing proxy materials to our stockholders primarily via the Internet. Internet distribution can help speed receipt by stockholders, lower the cost of our annual meeting, and reduce the environmental impact of printing and mailing hard copies. If you would like to help us reduce our costs of mailing future proxy materials, you can consent to receive proxy statements, proxy cards and annual reports electronically via e-mail or the internet. To sign up for electronic delivery, please follow the instructions below to vote your shares using the internet and, when prompted, indicate that you agree to receive or access proxy materials electronically. |
| Vote Your Shares By Internet |
| You can use the Internet to transmit your voting instructions and to consent for electronic delivery of information up until 11:59 P.M. Eastern Time the day before the meeting. Have your proxy card in hand when you access the web site at http://www.proxyvote.com and follow the instructions to obtain your records and to create an electronic voting instruction form. |
| Vote Your Shares by Phone |
| You can call 1-800-579-1639 and use any touch-tone telephone to transmit your voting instructions up until 11:59 P.M. Eastern Time on June 9, 2021. Have your proxy card in hand when you call and then follow the instructions. |