Disclosed herein are system, method, and computer program product embodiments for determining the quality of a route for sending messages. An embodiment operates by determining that a message in a stream of messages and associated with a route is a duplicate of a previous message associated with the route. The embodiment inserts a Boolean value into a duplicate detection queue associated with the route based on the determination. The embodiment calculates a route quality value for the route based on the duplicate detection queue. The embodiment then performs an action for the route based on the route quality value.