NAME

       RelayCountry - add message metadata indicating the country code of each relay

SYNOPSIS

         loadplugin     Mail::SpamAssassin::Plugin::RelayCountry

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.

REQUIREMENT

       This plugin uses Mail::SpamAssassin::GeoDB and requires a module supported by it, for
       example MaxMind::DB::Reader (GeoIP2).

perl v5.36.0                                2023-01-Mail::SpamAssassin::Plugin::RelayCountry(3pm)