django 32 sending email reference

reference:
https://medium.com/@_christopher/how-to-send-emails-with-python-django-through-google-smtp-server-for-free-22ea6ea0fb8e
https://bootsnipp.com/snippets/ykXa
https://www.sanwebe.com/2013/03/addremove-input-fields-dynamically-with-jquery
https://code.djangoproject.com/ticket/1130