Can I send out a group email to everyone that has filled out my form?

You can add an Autoresponder Email to your form if you want to send a confirmation email to the users who filled out your form.

However, if you would like to send a group email to all the email recipients, perhaps you need to integrate your form with an email marketing app like Mailchimp. Please see this link to see more Emailing Apps available in JotForm: https://apps.jotform.com/category/emailling

Cheers.