Blocking access by country

I found put interesting site http://blockacountry.com/index.php which provides lists of IP addresses belonging to countries. Information is available as text file in a .htaccess format. It could be easily parsed for using by Mikrotik to block access based on country.

This could be very helpful for blocking email spammers.

Service is free.

Found out another one: http://www.blackholes.us/
Also provides list of addresses with country information.

thanks