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Required CPAN module dependencies, choose one:
GeoIP2::Reader::Database | Supported since SpamAssassin 3.4.2, install MaxMind::DB::Reader::XS for best performance |
IP::Country::DB_File | Supported since SpamAssassin 3.4.2 |
Geo::IP | Supported since SpamAssassin 3.4.0 |
IP::Country::Fast | Not recommended, outdated |
Country metadata will also be added to the Bayesian filtering process, allowing it to learn information based on countries.
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UPDATE: Maintained legacy Geo::IP databases can be downloaded from several 3rd party sites:
Note about IP::Country::DB_File
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Easier way is to download a daily generated database, sponsored by HenrikKrohns:
The gunzipped file can be placed anywhere, just let SpamAssassin know where it is (country_db_path setting).
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Here you download occasionally updated files sponsored by HenrikKrohns: