Send automatic email messages on successful submission with custom messages in the Subject, Footer for signature, “From” name, specific “Reply to“ email, and Body. You may also choose to send the form’s response copy to the user along with a personalized message.

You can find this setting in the Form Settings section.

Note: In case you wish to disable the auto-responder email sent to your users, please uncheck the checkbox next to "Send submission email to the user" as shown below: