Is there a way to send 1 email to all submissions?

Is there a way to send 1 email to all submissions?

To clarify, do you want to send an email to user's that submitted your form?

Or do you want to send an email to your form user?

If you want to send an email to your form user, you may setup the autoresponder in your form.

Here is a guide:https://www.jotform.com/help/26-Setting-up-an-Autoresponder-Email

Let us know how it goes.