How does the Outbound Index complement other anti-spam methods?
Content Filters. The Outbound Index can reduce the load on content filtering/scoring/flagging systems such as SpamAssassin by cutting out both known-acceptable and known-rejectable email messages from the group that needs to be scrutinized by the content filter. The Outbound Index offers a dependable additional source of data to exempt messages from content filtering—thus reducing the false positive rate of the content filter and potentially allowing the content filter to run with a less-forgiving configuration on the remaining suspicious/unknown email. Content filters complement the Outbound Index by taking care of the unknown/suspicious category that the Outbound Index has insufficient data on. Blacklists. The Outbound Index can incorporate black or whitelist results into the composite query response returned to the query client. For example, if the Habeus Infringers List agreed to let the Outbound Index offer an HIL_allowed check, an email administrator could optionally choose t
