This is how I did it. For those having trouble imagining the use case, it was so the client who pays for the app could easily review the many mails the app sends.
http://stackoverflow.com/questions/27453578/rails-4-email-preview-in-production/39399116#39399116 ##production.rb MyApp::Application.configure do config.action_mailer.preview_path ||= defined?(Rails.root) ? "#{Rails.root}/spec/mailer_previews" : nil config.autoload_paths += [config.action_mailer.preview_path] routes.append do get '/rails/mailers' => "rails/mailers#index" get '/rails/mailers/*path' => "rails/mailers#preview" end end class ::Rails::MailersController before_filter :authenticate_admin! def local_request? true end private def authenticate_admin! ... end end -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/4b5ea4e3-e1e9-41da-9094-3421387bdbc3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

