> > Should this work? > > ${extract{boundary}{header_Content-Type:}{$value}}
> >
> > Because
> > Content-type: multipart/mixed; boundary="frontier"
>
> Have you considered using Exiscan's MIME-grokking
> capabilities for this?
No. Because I want to use unpatched, stock exim with just 'clever' configuration. And I am also stuck with 4.10 version of exim which was certified for its use a couple of years ago. And no need for upgrade.
And probably (even without checking) exiscan doesn't make what I want to do, calculate binary size of base64-encoded content (which don't even need to be decoded on this process). Nothing more, so no virus scan etc..
