1) When failed or could not to resolve location of IP address, use geoiplookup as last resort. 2) Make an option to use only geoiplookup & geoiplookup6 or just the database that these two are utilizing.
http://git.claws-mail.org/?p=claws.git;a=commit;h=3c64fb648dbb155c971fd0108f40fee7a36d2cb1