In many cases, its not practical to set the delay time as the TTL on the queue itself because (a) this same value is applied to all messages (b) the delay you want to apply will depend on when the app publishes the message vs when it should be made available for consumption. So in most cases, the publisher will set the TTL on each message when it is produced as the delta between time the message should be available to consume and the time at which it is published. With the JCSMP API, for example, you can do this with void setTimeToLive(long ttl) on XMLMessage (Solace Messaging API for Java v10.25.2).