OpenSRS supports the registration of domains in asynchronous registries. Asynchronous registries are those registries that do not provide a real time response to a requested action.
The OpenSRS system shields the complexity of the asynchronous email processing from you. However, you still need to be aware of it, because operations (actions) on a registry that is asynchronous do not give you a real-time success or failure response. Instead, you get a message that the action has been sent, and is awaiting processing by the remote registry. At some later point, you will see the actual results of your action (for example, if you make modifications to a domain, you won't see them until some time has elapsed).