```ruby
class Filters::Master < Filters::Delivery
  def data(delivery)
    # DKIM filter needs to always be the last one
    filtered = Filters::Dkim.new(Filters::ClickTracking.new(Filters::AddOpenTracking.new(filter)))
    filtered.data(delivery)
  end
end
```

Enable css inlining for all email
user
```ruby
class Filters::Master < Filters::Delivery
  def data(delivery)
    # DKIM filter needs to always be the last one
    filtered = Filters::Dkim.new(Filters::InlineCss.new(Filters::ClickTracking.new(Filters::AddOpenTracking.new(filter))))
    filtered.data(delivery)
  end
end
```
assistant