Mail::SpamAssassin::PlUser:Contributed PerlMail::SpamAssassin::Plugin::DCC(3p)



NAME
       Mail::SpamAssassin::Plugin::DCC - perform DCC check of messages

SYNOPSIS
         loadplugin     Mail::SpamAssassin::Plugin::DCC

         full DCC_CHECK        eval:check_dcc()
         full DCC_CHECK_50_79  eval:check_dcc_reputation_range('50','79')

DESCRIPTION
       The DCC or Distributed Checksum Clearinghouse is a system of servers
       collecting and counting checksums of millions of mail messages.
       TheSpamAssassin.pm counts can be used by SpamAssassin to detect and
       reject or filter spam.

       Because simplistic checksums of spam can be easily defeated, the main
       DCC checksums are fuzzy and ignore aspects of messages.  The fuzzy
       checksums are changed as spam evolves.

       Note that DCC is disabled by default in "init.pre" because it is not
       open source.  See the DCC license for more details.

       See http://www.rhyolite.com/anti-spam/dcc/ for more information about
       DCC.

TAGS
       The following tags are added to the set, available for use in reports,
       header fields, other plugins, etc.:

         _DCCB_    DCC server ID in a response
         _DCCR_    response from DCC - header field body in X-DCC-*-Metrics
         _DCCREP_  response from DCC - DCC reputation in percents (0..100)

       Tag _DCCREP_ provides a nonempty value only with commercial DCC
       systems.  This is the percentage of spam vs. ham sent from the first
       untrusted relay.

USER OPTIONS
       use_dcc (0|1)       (default: 1)
           Whether to use DCC, if it is available.

       dcc_body_max NUMBER
       dcc_fuz1_max NUMBER
       dcc_fuz2_max NUMBER
           This option sets how often a message's body/fuz1/fuz2 checksum must
           have been reported to the DCC server before SpamAssassin will
           consider the DCC check as matched.

           As nearly all DCC clients are auto-reporting these checksums, you
           should set this to a relatively high value, e.g. 999999 (this is
           DCC's MANY count).

           The default is 999999 for all these options.

       dcc_rep_percent NUMBER
           Only commercial DCC systems provide DCC reputation information.
           This is the percentage of spam vs. ham sent from the first
           untrusted relay.  It will hit on new spam from spam sources.
           Default is 90.

ADMINISTRATOR OPTIONS
       dcc_timeout n       (default: 8)
           How many seconds you wait for DCC to complete, before scanning
           continues without the DCC results.

       dcc_home STRING
           This option tells SpamAssassin where to find the dcc homedir.  If
           not given, it will try to get dcc to specify one, and if that fails
           it will try dcc's own default homedir of '/var/dcc'.  If "dcc_path"
           is not specified, it will default to looking in "dcc_home/bin" for
           dcc client instead of relying on SpamAssassin to find it in the
           current PATH.  If it isn't found there, it will look in the current
           PATH. If a "dccifd" socket is found in "dcc_home" or specified
           explicitly, it will use that interface instead of "dccproc".

       dcc_dccifd_path STRING
           This option tells SpamAssassin where to find the dccifd socket. If
           "dcc_dccifd_path" is not specified, it will default to looking for
           a socket named "dccifd" in a directory "dcc_home".  The
           "dcc_dccifd_path" can be a Unix socket name (absolute path), or an
           INET socket specification in a form "[host]:port" or "host:port",
           where a host can be an IPv4 or IPv6 address or a host name, and
           port is a TCP port number. In case of an IPv6 address the brackets
           are required syntax. If a "dccifd" socket is found, the plugin will
           use it instead of "dccproc".

       dcc_path STRING
           This option tells SpamAssassin specifically where to find the
           "dccproc" client instead of relying on SpamAssassin to find it in
           the current PATH.  Note that if taint mode is enabled in the Perl
           interpreter, you should use this, as the current PATH will have
           been cleared.

       dcc_options options
           Specify additional options to the dccproc(8) command. Please note
           that only characters in the range [0-9A-Za-z ,._/-] are allowed for
           security reasons.

           The default is "undef".

       dccifd_options options
           Specify additional options to send to the dccifd(8) daemon. Please
           note that only characters in the range [0-9A-Za-z ,._/-] are
           allowed for security reasons.

           The default is "undef".



perl v5.12.2                      2011-06-0Mail::SpamAssassin::Plugin::DCC(3p)
