Scroll to navigation

Courier::Filter::Module::DNSBL(3pm) User Contributed Perl Documentation Courier::Filter::Module::DNSBL(3pm)


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


    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 ],


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.


The following constructor is provided:

Creates a new DNSBL filter module.

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

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.


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

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


Julian Mehnle <>

2022-10-21 perl v5.34.0