[Exim] Logging Spam

On a shared hosting system one of the most inevitable things is
spam. People like to upload a perl script that spams and take advantage of the
fact that the webserver runs as nobody. I was wondering if it was
possible for exim to log the parent pid's cwd and exe when it is
called from a script/invoked by actually running /usr/sbin/exim or
/usr/sbin/sendmail.

            Nick