https://lists.exim.org/lurker/message/20120707.161423.79af567d.en.html
http://www.gossamer-threads.com/lists/exim/users/94633

http://dist.epipe.com/exim/

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MaxMind GeoIP dlfunc for Exim

This is an IPv6 capable GeoIP dlfunc library for Exim. It implements an
interface between Exim access control lists and MaxMind's GeoIP/GeoLite
database.
https://www.maxmind.com/app/geolite

This can be useful for greylisting or scoring IP addresses of
SMTP senders according to the country code of the sender's IP address.

Please see the README file for more information.
http://dist.epipe.com/exim/exim-geoipv6-dlfunc-0.1.README.txt
http://dist.epipe.com/exim/exim-geoipv6-dlfunc-0.1.tar.gz

The development version is available at GitHub.
https://github.com/snabb/exim-geoipv6-dlfunc
https://github.com/snabb/exim-geoipv6-dlfunc.git

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p0f version 3 dlfunc for Exim

This is p0f version 3 dlfunc library for Exim. It implements an interface
between Exim access control lists and the p0f daemon which does passive
OS fingerprinting.
http://lcamtuf.coredump.cx/p0f3/

This can be useful for greylisting or scoring IP addresses of SMTP senders
according to sender's operating system. p0f version 3 and this dlfunc
supports IPv6. Note that the interface is not compatible with p0f versions
2.x or older.

Please see the README file for more information.
http://dist.epipe.com/exim/exim-p0f3-dlfunc-0.1.README.txt
http://dist.epipe.com/exim/exim-p0f3-dlfunc-0.1.tar.gz

The development version is available at GitHub.
https://github.com/snabb/exim-p0f3-dlfunc
https://github.com/snabb/exim-p0f3-dlfunc.git