Monkeypatch ActionMailer's recipients

action_mailer_ext.rb

# config/initializers/action_mailer_ext.rb
# For Rails 2.x

if Rails.env.staging?

  class ActionMailer::Base
    def recipients(*params)
      @recipients = "staging@example.com"
    end
  
    def bcc(*params)
      @bcc = nil
    end

    def cc(*params)
      @cc = nil
    end
  end

end