Mail::SpamAssassin::Plugin::DCC(3)             User Contributed Perl Documentation            Mail::SpamAssassin::Plugin::DCC(3)



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 v5.12.4                                               2011-06-06                         Mail::SpamAssassin::Plugin::DCC(3)