how to dump message as it enters spamassassin

[sa]

Hi,

I am new to this list. I have searched the spamassassin FAQ and list 
archive but couldn't find the answer.

I have the following test rule in my local.cf:
header LOCAL_MISSING_MSGID      MESSAGEID =~ /^UNSET$/ [if-unset: UNSET]
describe LOCAL_MISSING_MSGID    Missing Message-Id header
score LOCAL_MISSING_MSGID       0.010

But it's not triggering. Other rules in local.cf are working, just this 
one isn't. To make things more complicated, my MTA inserts a Message-Id 
header when it doesn't see one, so by the time I get the source of the 
mail and feed it to spamassassin, it passes.

Is there a way to dump the input message as it enters spamassassin? I 
have spamd running as a daemon, using version 3.1.1. The log shows:

spamd[12345]: spamd: checking message (unknown) for (unknown):102

Thanks,
Robert