[Mimedefang] forged MIME boundary content filterable?

[Brett Kropf]

I believe that MD (2.45 at least) is ignoring content when the MIME 
boundary tags do not match.  This appears confirmed in a 2002 post:

http://lists.roaringpenguin.com/pipermail/mimedefang/2002-October/011559.html

Is there yet any way to filter within such forged boundaries?

(I've tried from within filter, filter_multipart, and filter_end, but 
the junk sails right by.)

TIA


example:

MIME-Version: 1.0
Content-Type: multipart/alternative;
  boundary="--51667138659207036"

----328925468879155
Content-Type: text/plain;
Content-Transfer-Encoding: quoted-printable

<snip>
this email originates from:
newpor<snip>eattle, wa 98111, usa

----32244059102053114--

----51667138659207036

----51667138659207036--