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# <@LICENSE> # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to you under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at: # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # </@LICENSE> =head1 NAME RelayCountry - add message metadata indicating the country code of each relay =head1 SYNOPSIS loadplugin Mail::SpamAssassin::Plugin::RelayCountry =head1 DESCRIPTION The RelayCountry plugin attempts to determine the domain country codes of each relay used in the delivery path of messages and add that information to the message metadata. Following metadata headers and tags are added: X-Relay-Countries _RELAYCOUNTRY_ All untrusted relays. Contains all relays starting from the trusted_networks border. This method has been used by default since early SA versions. X-Relay-Countries-External _RELAYCOUNTRYEXT_ All external relays. Contains all relays starting from the internal_networks border. Could be useful in some cases when trusted/msa_networks extend beyond the internal border and those need to be checked too. X-Relay-Countries-All _RELAYCOUNTRYALL_ All possible relays (internal + external). X-Relay-Countries-Auth _RELAYCOUNTRYAUTH_ Auth will contain all relays starting from the first relay that used authentication. For example, this could be used to check for hacked local users coming in from unexpected countries. If there are no authenticated relays, this will be empty. =head1 REQUIREMENT This plugin uses Mail::SpamAssassin::GeoDB and requires a module supported by it, for example MaxMind::DB::Reader (GeoIP2). =cut package Mail::SpamAssassin::Plugin::RelayCountry; use Mail::SpamAssassin::Plugin; use Mail::SpamAssassin::Logger; use strict; use warnings; # use bytes; use re 'taint'; our @ISA = qw(Mail::SpamAssassin::Plugin); my $db; my $dbv6; my $db_info; # will hold database info my $db_type; # will hold database type # constructor: register the eval rule sub new { my $class = shift; my $mailsaobject = shift; # some boilerplate... $class = ref($class) || $class; my $self = $class->SUPER::new($mailsaobject); bless ($self, $class); # we need GeoDB country $self->{main}->{geodb_wanted}->{country} = 1; return $self; } sub extract_metadata { my ($self, $opts) = @_; my $pms = $opts->{permsgstatus}; return if $self->{relaycountry_disabled}; if (!$self->{main}->{geodb} || !$self->{main}->{geodb}->can('country')) { dbg("metadata: RelayCountry: plugin disabled, GeoDB country not available"); $self->{relaycountry_disabled} = 1; return; } my $msg = $opts->{msg}; my $geodb = $self->{main}->{geodb}; my @cc_untrusted; foreach my $relay (@{$msg->{metadata}->{relays_untrusted}}) { my $ip = $relay->{ip}; my $cc = $geodb->get_country($ip); push @cc_untrusted, $cc; } my @cc_external; foreach my $relay (@{$msg->{metadata}->{relays_external}}) { my $ip = $relay->{ip}; my $cc = $geodb->get_country($ip); push @cc_external, $cc; } my @cc_auth; my $found_auth; foreach my $relay (@{$msg->{metadata}->{relays_trusted}}) { if ($relay->{auth}) { $found_auth = 1; } if ($found_auth) { my $ip = $relay->{ip}; my $cc = $geodb->get_country($ip); push @cc_auth, $cc; } } my @cc_all; foreach my $relay (@{$msg->{metadata}->{relays_internal}}, @{$msg->{metadata}->{relays_external}}) { my $ip = $relay->{ip}; my $cc = $geodb->get_country($ip); push @cc_all, $cc; } my $ccstr = join(' ', @cc_untrusted); $msg->put_metadata("X-Relay-Countries", $ccstr); dbg("metadata: X-Relay-Countries: $ccstr"); $pms->set_tag("RELAYCOUNTRY", @cc_untrusted == 1 ? $cc_untrusted[0] : \@cc_untrusted); $ccstr = join(' ', @cc_external); $msg->put_metadata("X-Relay-Countries-External", $ccstr); dbg("metadata: X-Relay-Countries-External: $ccstr"); $pms->set_tag("RELAYCOUNTRYEXT", @cc_external == 1 ? $cc_external[0] : \@cc_external); $ccstr = join(' ', @cc_auth); $msg->put_metadata("X-Relay-Countries-Auth", $ccstr); dbg("metadata: X-Relay-Countries-Auth: $ccstr"); $pms->set_tag("RELAYCOUNTRYAUTH", @cc_auth == 1 ? $cc_auth[0] : \@cc_auth); $ccstr = join(' ', @cc_all); $msg->put_metadata("X-Relay-Countries-All", $ccstr); dbg("metadata: X-Relay-Countries-All: $ccstr"); $pms->set_tag("RELAYCOUNTRYALL", @cc_all == 1 ? $cc_all[0] : \@cc_all); } 1;