[Exim] system filter & logging

I set up a system filter to fail various spam messages.

The 'fail' also has a fairly verbose text message. The message shows
up in my main log, and I would like to know if it is possible to
disable the logging of the fail message? Not sure from the docs.
--
Jim Pazarena    mailto:paz@qcislands.net
                http://www.qcislands.net/paz