它后面是Delivery to the following recipients failed.
问题描述：
它后面是Delivery to the following recipients failed.
答
感觉像是一般发出电邮或者聊天对话时,因为某种原因（譬如连接不好）导致对方没能收到后系统的反馈信息.当然,做为广义的东西没送到解也可以……