In an X420 Receive Method you can select some criteria for the incoming messages.
All the messages seem to be fetched from the X400 mailbox, including the ones that don not match the criteria. Those messages seem to be lost.
Is this expected behavior, or do we have to setup the X400 receive methods differently?

Initially all messages are retrieved from the X400 mailbox.

When a message is handled by the X420 Transfer Adapter Task, it takes the originator and recipient from the received message and matches these against the local and remote nodes. It takes the corresponding node aliases and the subject field from the message and matches these parameters against the configured receive methods, to find out which integration should execute for the received message..