[exim] is there a way to output the "id=" in a logwrite

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Author: isolderj
Date:  
To: exim-users
Subject: [exim] is there a way to output the "id=" in a logwrite

This is the log line I see in my mainlog. Is there a way to extract the "id=". I have tried various header variables but I cannot seem to output that specific string.

Sep 29 11:51:05 <hostname> exim[12554]: 2009-09-29 11:51:05 <Message ID> <= email@??? U=>user> P=<> S=<size> id=008801ca40ea$46423730$d2c6a590$@??? T=<subject> from <email@???> for email2@???

Thanks in advance for the help.
                      
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