[Mimedefang] Adding support for learning our addresses

[David F. Skoll]

David Nelson wrote:

> I subscribe to ip2location.com, which provides geolocation services by
> IP address.  The info is downloaded on nightly from their web servers
> and put into a database.  I check the IP addresses contained in the
> message against the database and if it's from a foreign country, I block
> it.

Isn't that a little draconian?  After all, most spam originates in the US
and Canada.  (And we couldn't possibly implement such a policy; about 90%
of our customers and 95% of our revenue are from a "foreign country." :-))

You can also get a free (but probably less accurate) database mapping IP
address to country from http://ip-to-country.webhosting.info/
We use it on our Web site; if someone fills in a form claiming to be
from Canada, but their IP address says Moldova, we treat the request with
a little extra skepticism.

Regards,

David.