Re: body test?

I think a body test would be a useful extension.  I can see an 
implementer choosing to either not support it, offer limited support, 
or full support.  By limited support I mean perhaps only the first xx 
octets of the body can be searched, and perhaps MIME decoding is or 
is not done.  There would need to be names for each optional 
subfeature, for extension capability reporting.