Exchange 2003, and Windows 2008 SMTP

I have configured SMTP on a Windows Server 2008 R2 box.  I also have a legacy Exchange server 2003 box that runs SMTP.  I set up some Ricoh Aficio scanners to send scanned images to email via the Windows 2008 SMTP server.  Everything works fine until I turn off the Exchange services on the 2003 box.  Viewing the logs on the 2008 SMTP box shows that it is relaying messages through the 2003 Exchange Server.  There appears to be some linkage among Exchange 2003, Active Directory, and Server 2008 SMTP.  How can I bypass the 2003 Exchange server?
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FDiskWizardConnect With a Mentor Commented:
Where do you intend for the emails to go? They have to go somewhere, right?
On 2008 there should be a SMART HOST setting. That is probably pointing at the Exchange server.

But it has to route the email somewhere... or do you have a newer Exchange now? If so, that probably needs to be your Smart Host for SMTP. The Smart Host (like Exchange) should know how to get email to the Internal and/or external recipients.

2008 Smart host info and screenshots here
http://coderjournal.com/2010/10/easy-mail-delivery-with-smtp-smart-host/
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