Mail::SpamAssassin::PlUser:Contributed Perl Mail::SpamAssassin::Plugin::DCC(3)NAMEMail::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 v5.16.22011-06-06Mail::SpamAssassin::Plugin::DCC(3)