How to allow internal SMTP in Windows Server 2003 SBS?

I am sure this is something simple that I missed.  I am running Server 2003 SBS.  Server IP as 10.10.10.10  recently bought a new Mitel switch (10.10.10.41) that needs to communicate to the server via SMTP.  By deault, I don't think the Server is allowing internal addresses.  I am getting "CSMTPClientMsg::ProcessResult - Failed sending Voice Mail to Email" & "CSMTPClientMsg::ProcessSMTPErrorResponse - Received SMTP error:  550 5.7.1 Unable to relay for address@email.net"  Trying to setup Universal Messaging where this feature allows users to forward voice messages to an email address.  I think the server need to set to accept email from the Mitel node and that attachments are allowed.

Experts, can you point me to where and how I can add the Mitel IP to be allowed on the server end?  Thanks
tricityhealth1Asked:
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Glen KnightConnect With a Mentor Commented:
In Exchange System Manager Navigate to Administrative Groups > First Administrative Group > Servers > Your Server Name > Protocols > SMTP and right click on SMTP Virtual Server
Under the Access tab click Relay and then ensure the IP address of your Mitel is in this list.

Restart the SMTP Virtual Server by right clicking select stop then right clicking and select start
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tricityhealth1Author Commented:
Thanks. This solves the problem.
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