1. Download and extract these two file from maxmind.com: GeoIPv6.dat.gz and GeoLiteCity.dat.gz
  2. Rename the GeoLiteCity.dat to GeoIPCity.dat
  3. Upload the GeoIPCity.dat and the GeoIPv6.dat into this folder wp-content/uploads/mailster/ (If your upload folder is located somewhere else you have to upload it in this directory.)
  4. Go to Settings => Newsletter => General and check the ‘Track Countries’ and ‘Track Cities’ checkbox
  5. Save your settings