Unlike other Email solutions, STC provides permission-controlled, locked down functionality.
Permission Controlled
STC Email allows each program to specify the external domains that can send/receive emails from that program.
Locked Down Functionality
STC users can only send emails to their contacts configured in their STC permissions. Users cannot type in their own emails, so information stays within the company.
Visibility
Every email provides read receipts, and additionally can require acknowledgement by the receiver.