Hi @as63010,
BinderHeaders.TARGET_DESTINATION is just to specify the topic that an individual message is sent to. That message is then handed to the binder that sends to that topic. If you want to publish to multiple binders then you could either use StreamBridge or you could have different send methods that each have their own bindings configured since each binding allows you to configure a different binder. Depending on how many binders you need I think the latter sounds like a nice option b/c I believe that would result in the framework verifying connectivity of each binding on startup. I haven’t seen anyone do this yet so please share if you get this working and which solution you end up trying 