Click on the Reporting tab to send an email to all of the registrants from a single Form or to all the registrants from multiple forms.
If you have multiple forms, filter for the form you are searching for the registrants for.
Once you have the correct list of registrants on the screen, look for the Email button on the bottom right-hand side.
Click this and the below screen will open:
Fill out the Subject and Schedule when you want the email to be sent. For example: If your event is 1/1/2016 maybe you want to send out a reminder email on 12/29/15. Complete the body of the email and hit 'Queue email'. If you want the email sent right away, leave the Schedule space blank and the email will be sent as soon as possible within the next 3 hours.
To see the status of your email, click the Admin tab. Scroll about halfway down the page and you should see 'Email Status'.This will show you the status of all previously and currently queued emails. Click on the “Job ID” to preview the email. Click “Cancel” to cancel an email which has not yet been sent. You will only have the cancel option available on emails that have not yet been sent.