You control whether and how messages are moderated in your group using the group type and moderation settings. In your group’s message formatting settings, you can control whether attachments to messages are moderated (or allowed at all).

You can also moderate and unmoderate individual topics in your group separately from the overall group moderation settings. For more information, see Editing the properties of topics in the archive.

Another way to moderate and unmoderate topics is to use hashtags that have moderation properties.

Tip: Groups.io has a setting that allows groups to automatically moderate topics that are older than a specified number of days. You might consider using this setting so moderators can review any replies that are posted to outdated topics. See Automatically Moderate Topics Older Than [n] Days.