URILocalBL - blocklist URIs using local information (ISP names, address lists, and country codes)

       The   Country-Code   based   filtering  can  use  any  Mail::SpamAssassin::GeoDB  supported  module  like
       MaxMind::DB::Reader (GeoIP2) or Geo::IP.  ISP based filtering might require a paid subscription  database
       like GeoIPISP.

perl v5.40.1                                       2025-06-26             Mail::SpamAssas...gin::URILocalBL(3pm)

       URILocalBL - blocklist URIs using local information (ISP names, address lists, and country codes)

       The format for defining a rule is as follows:

         uri_block_cc SYMBOLIC_TEST_NAME cc1 cc2 cc3 cc4 ..
         uri_block_cc SYMBOLIC_TEST_NAME !cc1 !cc2 ..

       or:

         uri_block_cont SYMBOLIC_TEST_NAME co1 co2 co3 co4 ..
         uri_block_cont SYMBOLIC_TEST_NAME !co1 !co2 ..

       or:

         uri_block_cidr SYMBOLIC_TEST_NAME a.a.a.a b.b.b.b/cc

       or:

         uri_block_isp SYMBOLIC_TEST_NAME "Data Rancid" McCarrier Phishers-r-Us

       Example rule for matching a URI in China:

         uri_block_cc TEST1 cn

       If you specify list of negations, such rule will match ANY  country  except  the  listed  ones  (Finland,
       Sweden):

         uri_block_cc TEST1 !fi !se

       Continents uri_block_cont works exactly the same as uri_block_cc.

       This would block the URL http://www.baidu.com/index.htm.  Similarly, to match a Spam-haven netblock:

         uri_block_cidr TEST2 65.181.64.0/18

       would match a netblock where several phishing sites were recently hosted.

       And to block all CIDR blocks registered to an ISP, one might use:

         uri_block_isp TEST3 "Data Rancid" ColoCrossing

       Quote ISP names containing spaces.

       Lastly,  if there's a country that you want to block but there's an explicit host you wish to exempt from
       that blocklist, you can use:

         uri_block_exclude TEST1 www.baidu.com

       if you wish to exempt URL's referring to this host. The same syntax is applicable to CIDR and ISP  blocks
       as well.

       This plugin creates some new rule test types, such as "uri_block_cc", "uri_block_cidr", and
       "uri_block_isp".  These rules apply to the URIs found in the HTML portion of a message, i.e. <a href=...>
       markup.

         loadplugin    Mail::SpamAssassin::Plugin::URILocalBL

       Why local blocklisting? There are a few excellent, effective, and well-maintained DNSBL's out there. But
       they have several drawbacks:

       • blocklists can cover tens of thousands of entries, and you can't select which ones you use;

       • verifying that it's correctly configured can be non-trivial;

       • new blocklisting entries may take a while to be detected and entered, so it's not instantaneous.

       Sometimes  all  you  want  is  a  quick,  easy,  and very surgical blocklisting of a particular site or a
       particular ISP. This plugin is defined for that exact usage case.