Send customer profile an email using custom field

{ "rules_send_customer_profile_an_email_using_custom_field" : {
    "LABEL" : "Send customer profile an email using custom field",
    "PLUGIN" : "reaction rule",
    "REQUIRES" : [ "rules", "entity" ],
    "ON" : [ "commerce_order_insert" ],
    "IF" : [
      { "entity_has_field" : { "entity" : [ "commerce-order" ], "field" : "commerce_customer_billing" } },
      { "entity_has_field" : {
          "entity" : [ "commerce-order:commerce-customer-billing" ],
          "field" : "field_email"
        }
      }
    ],
    "DO" : [
      { "mail" : {
          "to" : [ "commerce-order:commerce-customer-billing:field-email" ],
          "subject" : "Test!",
          "message" : "Test",
          "language" : [ "commerce-order:state" ]
        }
      }
    ]
  }
}