> Is there a rule that would allow one to score an email with an embedded
> graphic to a  negative spam value, no matter what else was in the
> body???

I'm not 100% sure what you're asking here, but just looking for a graphic 
attachment isn't a good sign one way or the other:

OVERALL%   SPAM%     HAM%     S/O    RANK   SCORE  NAME
  46713    40963     5750    0.877   0.00    0.00  (all messages)
100.000  87.6908  12.3092    0.877   0.00    0.00  (all messages as %)
  8.090   9.1961   0.2087    0.978   0.00    0.01  T_ATT_IMAGE
  0.000   0.0000   0.0000    0.500   0.00    0.01  T_ATT_TIFF
  2.216   2.5096   0.1217    0.954   0.00    0.01  T_ATT_JPEG
  5.844   6.6377   0.1913    0.972   0.00    0.01  T_ATT_GIF

This is from a quick run in 3.1 w/:
mimeheader    T_ATT_IMAGE   Content-Type =~ /^image\//
mimeheader    T_ATT_GIF     Content-Type =~ /^image\/gif/
mimeheader    T_ATT_JPEG    Content-Type =~ /^image\/jpe?g/
mimeheader    T_ATT_TIFF    Content-Type =~ /^image\/tiff/

-- 
Randomly Generated Tagline:
A gleekzorp without a tornpee is like a quop without a fertsneet (sort of).

Attachment: pgpcifP59osD7.pgp
Description: PGP signature

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