Werner Amon wrote:
[...]
> I don't know how to use system filters ..
Exim has a very good documentation which can be found at
www.exim.org.
If you had looked at the index or the contents-section, you would have
certainly found chapter 40, which explains the system_filter.
Basically, just put
system_filter = /path/to/filterfile
in the main-section of your exim.conf.
--
CU,
Patrick.