[exim] Dud MX for spam trap

    I read your document on your mail config, a good percentage of which we 
already implement, good job. My main question though regards the dud 
spam server, we've been yhinking about implementing the same thing here 
and was just wondering is it as simple as running a second version of 
the mta(we use exim here as well) on the server? Is there any load 
issues/ complications that you have come accross in the time you have 
been running?