```ruby
Rails.application.configure do
  config.cache_classes = true
  config.eager_load = false
  config.serve_static_assets  = true
  config.static_cache_control = 'public, max-age=3600'
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false
  config.action_dispatch.show_exceptions = false
  config.action_controller.allow_forgery_protection = false
  config.action_mailer.delivery_method = :test
  config.active_support.deprecation = :stderr

  Mail.defaults do
    delivery_method :test
  end
end
```

Remove stray 'Mail' reference which was erroring
user
```ruby
Rails.application.configure do
  config.cache_classes = true
  config.eager_load = false
  config.serve_static_assets  = true
  config.static_cache_control = 'public, max-age=3600'
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false
  config.action_dispatch.show_exceptions = false
  config.action_controller.allow_forgery_protection = false
  config.action_mailer.delivery_method = :test
  config.active_support.deprecation = :stderr
end
```
assistant