Hi Marin!
We just released NServiceBus.RabbitMQ 5.1.0 that allows access to the BasicDeliveryEventArgs to allow you to extract the info you need.
The documentation for this is here : RabbitMQ transport native integration sample • RabbitMQ Transport Samples • Particular Docs
We’ve also consolidated information relevant to integrating native RabbitMQ apps with NServiceBus endpoints here:
Hope this helps!
Cheers,
Andreas