Block spam by using geoip filter?
- by faultyserver
We are looking for a way to be able to block spam based on geographic location by filtering using geoip.
context: we rarely have any email correspondence outside of the USA, so we would like to block all incoming email outside the US except for maybe one or two countries.
After a little Googling I have found a couple of solutions that may work (or not), but I would like to know what other sysadmins are currently doing or what they would recommend as a solution.
Here is what I have found so far:
Using PowerDNS and its GeoIP backend it is possible to use geoip for filtering. Normally this backend is used to help distribute load as a kind of load balancing but I dont see why it couldnt be used to kill spam as well?
Possibly use the Maxmind lite country database and some scripting to do a similar job.
Ideally what I am looking for is a solution that would handle decent load and scale well too...aren't we all! ;)
Thanks in advance for your help! :-)
