Julien Vehent: > Also for this last query, it looks like 65% of the IPs cannot be linked > to a country (XX = unknown). I'm not very familiar with the way geo-ip > databases gather their data, is that normal numbers for zombies ?
This is not my experience. A few times a year I do a one-time purchase from a high-quality geopIP provider, to prepare nice spam-by-time-of-day and pregreet-delay charts by country for an upcoming Postfix presentation. With these databases I seem to have no problems identifying countries, as long as I use a current database snapshot. Wietse