ClrStream comes in two plans. ClrStream Basic and ClrStream Continuity.
ClrStream Basic provides Inbound and Outbound protection for your mailing domain using the Secure Mail flow system.
ClrStream Continuity provides Inbound and Outbound protection for your domains using Secure Mail flow as well as an alternative way for your domain users to continue receiving mail and communicate over mail if the primary email server is down via a secondary mailbox. This secondary mailbox is hosted on the SkyConnect servers.
This document explains the easy steps to get started with ClrStream Basic or Continuity.