Thanks folks, but I need the email headers, which contain the originating IP addresses and other information I need. How you obtain them depends on the email client you use to read mails - consult the Help section for your specific client. Email headers look similar to the following example:

Received: from abcda.mta.somedomain.net (mailserver-email [xx.xx.xx.xx])
by abcda1.mta.somedomain.net (Postfix) with ESMTP id 363B455C01
for <[email protected]>; Wed, 3 Aug 2005 10:49:24 -0700 (PDT)
Received: from smtp5.hushmail.com (xx.xx.xx.xx [xx.xx.xx.xx])
by abcda.mta.somedomain.net (EON-PMTA) with ESMTP id F4C93F7D
for <[email protected]>; Wed, 3 Aug 2005 10:49:24 -0700
Received: from hushmail.com (localhost [127.0.0.1])
by smtp5.hushmail.com (Postfix) with SMTP id 6B02917964F
for <[email protected]>; Wed, 3 Aug 2005 10:49:23 -0700 (PDT)
Nnotification: true
To: [email protected]
From: [email protected]
Subject: Hushmail from [email protected]
Message-Id: <[email protected]>
Date: Wed, 3 Aug 2005 10:49:23 -0700 (PDT)
Sender: [email protected]