Copier can't send to external email recipients Exchange 2010 and 2003 A/D

I have a copier that is able to scan to local email recipients on our local Exchange 2010 Server but cannot email to external recipients UNLESS I use my domain administrator account in the auth setup of the copier.  Regular email user's won't pass the authentication check on the copier.
My environment is as follows.
1 Exchange 2010 Server
1 2003 R2 Native Active Directory server
I created a receive connector to allow the copier's IP to relay under Server Configuration, Hub Transport.

So what specific permissions do I need to add to my "copier@mydomain.com" account so that it can successfully authenticate with my environment?
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mcrosslandAsked:
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mcrosslandConnect With a Mentor Author Commented:
Resolution involved allowing UNIX devices to authenticate to my Windows 2003 domain in the Server's local security policy.
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ChiefITCommented:
There are settings within exchange that prevent computers and any nodes from sending emails through the exchange server. These rules are designed to prevent your exchange server from becoming an open relay from anonymous workstations and computers. You can explicitly grant these nodes the ability to send traffic. And as a rule of thumb the admin account is granted permissions to relay traffic. You might review this topic. But, be explicit and plan to prevent mass mailing worms from hijacking your server and blacklisting you.

http://exchangepedia.com/2007/01/exchange-server-2007-how-to-allow-relaying.html
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Auric1983Commented:
Basically you need to create a send connector that allows anonymous relaying. BUT I would scope that connector to ONLY the IP address of the Copier you are trying to send from.
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mcrosslandAuthor Commented:
Found resolution on my own.
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