I contacted support about how to turn off the “pending messages” feature in G Suite (formerly Google Apps) groups, so I’ll share their response.
The setting to prevent messages sent to groups that are determined as spam from being held can be configured with the following procedure:
The default for this setting is fixed at [Send to moderation queue and notify moderators] and it seems the default setting cannot be changed.
You can only change this setting in each group’s management screen. I hope for future feature improvements.
That’s all from the Gemba.