[exim] handle MIME parts in system filter

Dear List,



In the battle against phishing attacks, I have implemented an inspection queue using
the exim system_filter file.



The filter classifies and freezes suspected phishing messages so that we can view,
release or delete them.



The filter is good for plain text, but it does not handle message bodies encoded with
base64, quoted-printable, etc.



Can anyone show me a mechanism to decode MIME parts in such a way that they can
be handled by the system filter?



--------------------------------------------------------------------------------------------------------

David McLaughlin
Mail & Directories Group
ETH Zürich