On 5 Nov 2013, at 12:29, 3k4b251 <314992959 at qq.com> wrote: > Can you also tell me what's diffrent > between x-message-tll and x-dead-letter-exchange http://www.rabbitmq.com/ttl.html http://www.rabbitmq.com/dlx.html MK Software Engineer, Pivotal/RabbitMQ