The next release of Declude JunkMail will have an *experimental* feature
(which may or may not become an official feature) that will allow for
filtering based on the countries that an E-mail passed through.
The filtering will require a file of about 200K that should occasionally be
updated as new IPs are allocated (as an experimental feature, there is a
chance that we may not be able to continue providing updated files), which
will contain the IP->country information. The existing filter test type
will have two new pieces of information that can be filtered: "COUNTRY"
(which will have the 2-digit code of the country of the remote mailserver)
and "COUNTRIES" (which will have the 2-digit country code of all the
countries that the E-mail passed through).
Also, a %COUNTYCHAIN% variable will be included that can be used to display
the list of countries that an E-mail passed through
("BRAZIL->CHINA->destination", for example, if someone in Brazil sent an
E-mail through a mailserver in China).
Sample filter entries might look like:
COUNTRY 0 IS cn
COUNTRIES 0 CONTAINS kr
The first entry would cause the test to fail if the remote mailserver was
located in China, and the second entry would cause the test to fail if the
E-mail passed through Korea (either the remote mailserver was in Korea, the
E-mail originated in Korea, or the E-mail passed through a mailserver in
Korea).
-Scott
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