    # File lib/action_mailer/vendor/tmail-1.2.3/tmail/mail.rb, line 169
        def accept( strategy )
          with_multipart_encoding(strategy) {
              ordered_each do |name, field|
                next if field.empty?
                strategy.header_name canonical(name)
                field.accept strategy
                strategy.puts
              end
              strategy.puts
              body_port().ropen {|r|
                  strategy.write r.read
              }
          }
        end