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How do I enable SBS 2008 and exchange to send mail via SMTP without authentication?

I have a handful of network scanners that don't have anyway of configuring SMTP authentication. So I want the SBS/Exchange to be an open relay (either for just the scanners or for the company internal mail) so that the scans can be emailed.

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up vote 4 down vote accepted

Here's an article related to setting this up in Exchange Server 2007.

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+1, Wow, I'm glad someone's around to call me out on my brainfarts. – Chris S Oct 20 '10 at 14:21

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