Email preview in production in rails 4


I am using rails 4.1.1 and ActionMailer::Preview. In development environment everything is working excellent.

But in production environment the preview routes are not accessible. I store the previews in test/mailers/previews/
Is is possible to enable them for production?

I have also asked (I used this gem in rails 3. As far as I know it now merged in rails 4 and is used for mail previews)