Journaled messages are system messages
Be careful when you edit or change your connnector configurations. If you have journaling enabled, and sending off to a 3rd party archive storage, make sure that you have "system" messages allowed on the content-restrictions tab of the connector properties.
Journaled messages are treated as system messages, and if the connector being used prohibits system messages, the messages blackhole and are lost.
e.g you have a connector with address space of frontbridge.com, where all your journaled messages are archived, then its imperative to have system messages allowed on that connector.