How do I send a mass email to everyone that registered for an event?

Hello.

Since we don't have a feature that is integrated to do that, we will recommend doing this with the help of excel.

Just go to inbox and select all of your submissions(of the event form) by clicking on the box on top of the submissions, then navigate to Download. Select Download All and as a format, select As Excel file. After your excel file is downloaded, copy the email fields altogether, and paste them to your email field of the email service that you use:

Thanks for asking this question. We are happy to assist you.