NAME

       Courier::Filter::Module::DNSBL - DNS black-list filter module for the Courier::Filter
       framework

SYNOPSIS

           use Courier::Filter::Module::DNSBL;

           my $module = Courier::Filter::Module::DNSBL->new(
               zones       => \@dns_zones,

               logger      => $logger,
               inverse     => 0,
               trusting    => 0,
               testing     => 0,
               debugging   => 0
           );

           my $filter = Courier::Filter->new(
               ...
               modules     => [ $module ],
               ...
           );

DESCRIPTION

       This class is a filter module class for use with Courier::Filter.  It matches a message if
       the sending machine's IP address (currently IPv4 only) is listed by one of the configured
       DNS black-lists.

   Constructor
       The following constructor is provided:

       new(%options): returns Courier::Filter::Module::DNSBL
           Creates a new DNSBL filter module.

           %options is a list of key/value pairs representing any of the following options:

           zones
               Required.  A reference to an array containing the DNS zone names of the black-
               lists to be used.

           All options of the Courier::Filter::Module constructor are also supported.  Please see
           "new()" in Courier::Filter::Module for their descriptions.

   Instance methods
       See "Instance methods" in Courier::Filter::Module for a description of the provided
       instance methods.

SEE ALSO

       Courier::Filter::Module, Courier::Filter::Overview.

       For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview.

AUTHOR

       Julian Mehnle <julian@mehnle.net>