You can select any number of submissions and can send response emails to those submissions.
Here's how to send an email as a response
Select the submissions to which you want to respond.
Click on the
Take actiondropdown button in the subheader.
Send emailoption from the dropdown, which will open a form in a pane.
Select a predefined email template or compose an email from the pane.
Sendto send the response mail to all submissions holding a valid email address