[exim] How do i set up Exim4 to send system mails

I want to set up a MTA just to send me system messages, such as over quota
or md alerts.


I know EXIM4 is installed by default, but how do i set it up just to send
and do nothing else. Or would sendmail be easier, but i thouth i might as
well use Debians default.


Many thanks


Ken