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Mail::SpamAssassin::PlUusgeirn:C:oUnRtIrDiNbSuBtLe(d3)PMearil:D:oScpuameAnstsatsisoin::Plugin::URIDNSBL(3)

NAME

  URIDNSBL - look up URLs against DNS blocklists

  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.


SYNOPSIS

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


CONFIGURATION

  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".

      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, a non-negative decimal number to specify a bitmask
      for RHSBLs that return a single A record containing a bitmask of
      results, or (if none of the preceding options seem to fit) a regular
      expression.

      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

  uridnsbl_timeout N		  (default: 2)
      Specify the maximum number of seconds to wait for a result before
      giving up on the lookup.	Note that this is in addition to the normal
      DNS timeout applied for DNSBL lookups on IPs found in the Received
      headers.

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

  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.

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