brotherton-erpnext/utilities/demo/demo_control_panel.py

  def on_login(self):
    from webnotes.utils import validate_email_add
    import conf
    if hasattr(conf, "demo_notify_url"):
      if webnotes.form_dict.lead_email and validate_email_add(webnotes.form_dict.lead_email):
        import requests
        response = requests.post(conf.demo_notify_url, data={
          "cmd":"portal.utils.send_message",
          "subject":"Logged into Demo",
          "sender": webnotes.form_dict.lead_email,
          "message": "via demo.erpnext.com"
        })