You can specify the starting time and stopping time in email sending.
Click the in Tool Bar to start Email Sending.
In the popup window, you can specify the "Starting Time" and "Stopping Time".
Starting Time
Start Now - Email sending will be started immediately.
Start by Schedule - Email sending will be started after the starting time.
Stopping Time
Stop Manually - Email sending will be continue until you stop it manually.
Stop by Schedule - Email sending will be stopped after the stopping time.
If you choose "Stop by Schedule", you can provided with an option to specify whether close the RoboMail when email sending stopped.