Kill Level or Threshold – the numerical value that identifies a message as spam. When the predefined value is surpassed the specified action is taken.

Whitelist - a list of email addresses (i.e. friend@aol.com) or email domains (i.e. @aol.com) that you wish to always deliver to your inbox.

Blacklist - a list of email addresses (i.e. joemoe@aol.com) or email domains (i.e. @aol.com) that you wish to always deliver to your spam folder