MsmqServices Properties Dialog Box - General Tab
Applies To: Windows Server 2008
Default lifetime of a message in the network
Provides a space for you to type the maximum amount of time (in hours or days) that a message can take to reach its destination queue before being placed in a dead-letter queue.
This value is called time-to-reach-queue (TTRQ).
Provides a space for you to type the units of measure you want to use with the associated Default lifetime of a message in the network value.
You can also click the scroll arrows to select a new setting. You can specify this value in seconds, minutes, hours or days.