Sometimes things go wrong and suddenly your list implodes. A wave of messages arrives from unexpected sources, or a loop gets started, where each message automatically generates a reply. Whatever the cause, you want to stop it, then figure out what happened.

Or, in a more peaceful vein, you want to shut down your list temporarily for whatever reason.

To temporarily stop anything from being posted to your list, set the list to moderated.

With this setting, people can still submit messages to the list, but nothing will be posted until and unless you approve it.

When the emergency is over, return to this setting and select the desired level of moderation for your list.