How to forward as attachment with KMail filter

[John Scott]

> Try "Redirect to" instead of "Forward to". This will redirect the message 
> as-is (with some additional headers).

Unfortunately SpamCop doesn't like that. I tried making a custom forwarding 
template so it would print the headers and then original message body, and 
even set the type to Forwarding template.

When I try to set it up from my filter settings, the box that would let me 
change it from the default template is greyed out.
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