troubleshooting Question

Exchange 2007 SMTP Domains

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sedberg1 asked on
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I"m setting up a test organization with Exchange 2007.  The domain name inside is divind.internal and the public domain is  I can connect to the Exchange server with Outlook 2007 no problem and send to anyone else using a divind.internal address.  When I try to send an email out to the Internet, I get the following error:

Microsoft Exchange couldn't deliver the message to this recipient because it didn't recognize you as a valid sender. Please verify that you have the correct sending address configured in your e-mail client and try sending your message again, or provide the following diagnostic text to your system administrator

The following organization rejected your message:

Now, I know that .internal is not routable over the Internet and .com is.  How can I get this annoying error to go away?
Rick Fee
Messaging Engineer - Disaster Recovery Engineer

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