This section allows you to choose between two filtering modes: Standard and Light. Light filtering uses a higher point total to classify spam, and therefore is less capable of detecting and filtering out spam; however, if you have set your spam to by deleted automatically, you may want to use the lighter filtering mode to ensure that regular email classified as spam is not deleted.
Please note: There is always a risk that the spam filter may classify legitimate email as spam. You may not want to enable the automatic deletion of spam if you are concerned about this possibility.
For more information on what options are available in dealing with detected spam, see the section titled Delivery options.