collect_responses

# File actionmailer/lib/action_mailer/base.rb, line 917
      def collect_responses(headers)
        if block_given?
          collector = ActionMailer::Collector.new(lookup_context) { render(action_name) }
          yield(collector)
          collector.responses
        elsif headers[:body]
          collect_responses_from_text(headers)
        else
          collect_responses_from_templates(headers)
        end
      end