[Mimedefang] splitting traffic

[John Rudd]

I want to take my incoming traffic to my mimedefang boxes and split the 
traffic so that an exact copy of the original pre-scanned messages goes 
to my test machines.

I want to:

   a) replace the sender information with a local address (that goes to 
/dev/null)

   b) remove any non-local recipients (and if there's none left after 
that, then drop the split message)

   c) replace local recipients with $userpart at my-test-box


But not disturb the original message in anyway.


Anyone have an example set of code for accomplishing this?