Symantec Messaging Gateway provides an Expunger that manages the size of your content incident folders. You can specify the frequency at which you want the Expunger to run. The default frequency is every day at 4:00 A.M. When the Expunger runs, it takes the default actions that you specify in your content filtering policies. Then it deletes the incidents based on the threshold criteria: folder size or days to store in the folder.