Email Speakers or Attendees as Editor

1. From the desired event, click Editor Home

2. Click View to the right of the Session Title

3. Click Manage Session 

Click the Speaker's Tab to display the complete list. From here you can select some or all, and send a message by clicking the Send Email button 

Once done writing the message, click Send

Go to the Attendee's tab, to display the complete list. For Attendees, you can send a message by clicking  Send Email or Exportto receive an email with the list of attendees