[Exim] collecting a list of rejected hosts (anti-spam measur…

Greetings.

I want to use the proxycheck program
(http://www.corpit.ru/mjt/proxycheck.html) against every rejected host to
test for presence of open relay/proxy, and submit positive results to
dsbl.org. So I need to spawn external program each time when RCPT TO: has
been rejected by ACL. Or at least to write rejected IPs to file.

Is there any way to do it besides analyzing of log files?

--
Alexey Promokhov <ayp#ayp.msk.ru>