SA-Exim errors

"Jerry Rasmussen" <[email protected]>
Newsgroups gmane.mail.exim.spamassassin
Message-ID <[email protected]> 

Where can I look to find out more about why this error is being
generated?

X-SA-Exim-Version: 3.0 (built Sun Jun  1 08:16:53 EDT 2003)
X-SA-Exim-Scanned: No; Unknown failure

I am running Exim4.20 and sa Exim 3.0 on a red hat 9 os.  Any help would
be appreciated.
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