each “a Zix Company”) operate Web sites located at zix.com (with the exception of investor.zixcorp.com), secure-zixcorp.com, zixmessagecenter.com, zixmessagecentre.com, zixit.com, powerofeveryone.com, spamstopshere.com, greenviewdata.com, erado.com, appriver.com, roaringpenguin.com, and totaldefense.com , their subdomains (collectively, the “Sites”), through which users can obtain information about Zix and subscribe to various security services provided by Zix (collectively, the “Zix Services” or the “Zix Company Services”), and mobile applications including ZixOne, Total Defense Mobile Security, and the DeliverySlip Apps (the “Apps”).