If you want to send the applicant a message after submission this is where you set everything up
To change the autoresponder go to Settings > Interest Calculator > Autoresponder
Check the box to enable the autoresponder
The from name and email will use those from the site settings if you leave these fields blank
The subject is what appears in the subject line of the email
Write the message you want to sent adding the shortcodes where applicable. If you need more shortcodes just ask.
You can also attach a copy of their application to the message is you want.