IMessage.TimeToLive Property

The number of milliseconds before the message is discarded or moved to a Dead Message Queue. A value of 0 means the message never expires. The default value is zero.

Note that this property is only valid for Guaranteed Delivery messages (Persistent and Non-Persistent). It has no effect when used in conjunction with other message types unless the message is promoted by the appliance to a Guaranteed Delivery message.

long TimeToLive { get; set; }