To receive form submissions directly to your email, go to Site settings → Forms → select E-mail from the list of the Form data collection services.
After your email is confirmed, go to the web page Editor, open the Content panel of the block containing the form and select the newly added email as a Form data receiver service.
Note. Each email address should be connected and activated separately.
Read more about enabling this service: http://help.tilda.ws/formsemail