# Package org.eclipse.viatra.query.runtime.rete.network.mailbox

- Interface Summary
  Interface | Description
  --- | ---
  AdaptableMailbox | An adaptable mailbox can be wrapped by another mailbox to act in behalf of that.
  FallThroughCapableMailbox | A fall through capable mailbox can directly call the update method of its `Receiver` instead of using the standard post-deliver mailbox semantics.
  Mailbox | A mailbox is associated with every `Receiver`.
  MessageIndexerFactory<I extends MessageIndexer> | A factory used to create message indexers for `Mailbox`es.