*Log into the sub account and go SETTINGS->ACCOUNT->OUTGOING EMAIL. Set the system up to use the sub accounts Email address following the instructions (click on HELP in the top right menu).
*Go to SUB ACCOUNTS click on "Manage Account" and set "Outgoing Email"=Never use Master Account or Use Master Account as Fallback.
=== Block Sub Accounts from sending SMS===
Enter the names of the pages you want to hide
automail.smsenable,owners.smsenable,owners.smsenable2
in "Hide menu pages".
===Messages to Sub Accounts ===