# File /home/matt/rubymail/mail/lda.rb, line 288
      def exitcode(exception)
	case exception
	when DeliverySuccess
	  Mail::MTA::EXITCODE_DELIVERED
	when DeliveryReject
	  Mail::MTA::EXITCODE_REJECT
	when DeliveryComplete
	  Mail::MTA::EXITCODE_DEFER
	else
	  raise ArgumentError,
	    "argument is not a DeliveryComplete exception: " +
	    "#{exception.inspect} (#{exception.type})"
	end
      end