This website form will create a Lead in back end side. If lead is not able to create at back side then there must be command line error. You need to paste it over here so I can suggest something.

If you want to get email then you have 2 options.

1. Create Lead & Get email :

In this option, let lead creation process as it is and you use server action. Please define a server action like when new lead created, your user assign as a responsible user of that lead. So when any user being a responsible, they automatically added as follower of that lead. And when you be follower of any lead, you will automatically get an email. 

2. Don't create lead and get only email :

In this option, go to website_crm >> controllers >> main.py file and override the following method,

 def create_lead(self, request, values, kwargs):
 """ Allow to be overrided """
     cr, context = request.cr, request.context
     return request.registry['crm.lead'].create(cr, SUPERUSER_ID, values, context=dict(context, mail_create_nosubscribe=True))

Here I have just given the way / logic not the exact code. From your "broad" experience from Odoo forum so far, I think you are capable enough to code yourself.

All the best !