Mail::SpamAssassin::Plugin::URIDNSBL

Mail::SpamAssassin::PUsernContributed3Mail::SpamAssassin::Plugin::URIDNSBL(3)



NAME
       URIDNSBL - look up URLs against DNS blocklists

SYNOPSIS
	 loadplugin    Mail::SpamAssassin::Plugin::URIDNSBL
	 uridnsbl      URIBL_SBLXBL    sbl-xbl.spamhaus.org.   TXT

DESCRIPTION
       This works by analysing message text and HTML for URLs, extracting the
       domain names from those, querying their NS records in DNS, resolving
       the hostnames used therein, and querying various DNS blocklists for
       those IP addresses.  This is quite effective.

USER SETTINGS
       uridnsbl_skip_domain domain1 domain2 ...
	   Specify a domain, or a number of domains, which should be skipped
	   for the URIBL checks.  This is very useful to specify very common
	   domains which are not going to be listed in URIBLs.

RULE DEFINITIONS AND PRIVILEGED SETTINGS
       uridnsbl NAME_OF_RULE dnsbl_zone lookuptype
	   Specify a lookup.  "NAME_OF_RULE" is the name of the rule to be
	   used, "dnsbl_zone" is the zone to look up IPs in, and "lookuptype"
	   is the type of lookup (TXT or A).   Note that you must also define
	   a body-eval rule calling "check_uridnsbl()" to use this.

	   Example:

	    uridnsbl	    URIBL_SBLXBL    sbl-xbl.spamhaus.org.   TXT
	    body	    URIBL_SBLXBL    eval:check_uridnsbl(’URIBL_SBLXBL’)
	    describe	    URIBL_SBLXBL    Contains a URL listed in the SBL/XBL blocklist

       urirhsbl NAME_OF_RULE rhsbl_zone lookuptype
	   Specify a RHSBL-style domain lookup.	 "NAME_OF_RULE" is the name
	   of the rule to be used, "rhsbl_zone" is the zone to look up domain
	   names in, and "lookuptype" is the type of lookup (TXT or A).
	   Note that you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

	   An RHSBL zone is one where the domain name is looked up, as a
	   string; e.g. a URI using the domain "foo.com" will cause a lookup
	   of "foo.com.uriblzone.net".	Note that hostnames are stripped from
	   the domain used in the URIBL lookup, so the domain "foo.bar.com"
	   will look up "bar.com.uriblzone.net", and "foo.bar.co.uk" will
	   look up "bar.co.uk.uriblzone.net".

	   If a URI consists IP address instead of a hostname, the IP address
	   is looked up (using the standard reversed quads method) in each
	   "rhsbl_zone".

	   Example:

	     urirhsbl	     URIBL_RHSBL    rhsbl.example.org.	 TXT

       urirhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
	   Specify a RHSBL-style domain lookup with a sub-test.
	   "NAME_OF_RULE" is the name of the rule to be used, "rhsbl_zone" is
	   the zone to look up domain names in, and "lookuptype" is the type
	   of lookup (TXT or A).

	   "subtest" is the sub-test to run against the returned data.	The
	   sub-test may either be an IPv4 dotted address for RHSBLs that
	   return multiple A records or a non-negative decimal number to
	   specify a bitmask for RHSBLs that return a single A record con-
	   taining a bitmask of results.

	   Note that, as with "urirhsbl", you must also define a body-eval
	   rule calling "check_uridnsbl()" to use this.

	   Example:

	     urirhssub	 URIBL_RHSBL_4	  rhsbl.example.org.   A    127.0.0.4
	     urirhssub	 URIBL_RHSBL_8	  rhsbl.example.org.   A    8

ADMINISTRATOR SETTINGS
       uridnsbl_max_domains N	     (default: 20)
	   The maximum number of domains to look up.

NOTES
       The "uridnsbl_timeout" option has been obsoleted by the "rbl_timeout"
       option.	See the "Mail::SpamAssassin::Conf" POD for details on
       "rbl_timeout".



perl v5.8.8			  2008Mail::SpamAssassin::Plugin::URIDNSBL(3)