gnus: BBDB Whitelists

 
 9.17.6.2 BBDB Whitelists
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  -- Variable: spam-use-BBDB
 
      Analogous to ‘spam-use-whitelist’ (SeeBlacklists and
      Whitelists), but uses the BBDB as the source of whitelisted
      addresses, without regular expressions.  You must have the BBDB
      loaded for ‘spam-use-BBDB’ to work properly.  Messages whose
      senders are not in the BBDB will be sent to the next spam-split
      rule.  This is an explicit filter, meaning that unless someone is
      in the BBDB, their messages are not assumed to be spam or ham.
 
  -- Variable: spam-use-BBDB-exclusive
 
      Set this variable to ‘t’ if you want to use the BBDB as an implicit
      filter, meaning that every message will be considered spam unless
      the sender is in the BBDB.  Use with care.  Only sender addresses
      in the BBDB will be allowed through; all others will be classified
      as spammers.
 
      While ‘spam-use-BBDB-exclusive’ _can_ be used as an alias for
      ‘spam-use-BBDB’ as far as ‘spam.el’ is concerned, it is _not_ a
      separate back end.  If you set ‘spam-use-BBDB-exclusive’ to ‘t’,
      _all_ your BBDB splitting will be exclusive.
 
  -- Variable: gnus-group-ham-exit-processor-BBDB
 
      Add this symbol to a group’s ‘spam-process’ parameter by
      customizing the group parameters or the
      ‘gnus-spam-process-newsgroups’ variable.  When this symbol is added
      to a group’s ‘spam-process’ parameter, the senders of ham-marked
      articles in _ham_ groups will be added to the BBDB.
 
      _WARNING_
 
      Instead of the obsolete ‘gnus-group-ham-exit-processor-BBDB’, it is
      recommended that you use ‘(ham spam-use-BBDB)’.  Everything will
      work the same way, we promise.