Solace and Boomi - Acknowledgement process

@cmorneau Thanks a lot for your guidance, It worked great. I need one more suggestion from you. I want to test the scenarios of - how can I forcefully push messages to dead letter queues. Even if I made destination system connection info wrong the message still stays in queue, I want to forcefully test dead letter queue messages to move around to main queue.

How can I push messages to dead letter queues? how can I do that? any properties to be set ?