.Net Application Routing Emails from SMTP to Exchange Server Error

5 pts.
Tags:
.NET applications
Microsoft Exchange
Microsoft Exchange errors
Microsoft Windows Server 2003
SMTP
SQL Server
Our .Net app works fine using current We.config settigs if we send emails to an external SMTP host. When we point it to our Exchange server it won't work! Any ideas please help. Are there specific SMTP Server settings we need for this to work with Exchange, or any Exchange Server settings that might be blocking this. The user account we are using does exist in Exchange!!!

Software/Hardware used:
.Net 3.0 Framework, IIS Sever v6, MS SQL Server, Win Server 2003

Answer Wiki

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Your internal Exchange server is not configured to “relay” so you will need to have the Exchange Admin configure the SMTP connector settings to allow your application server to send emails thru it. He will need to be provided the IP address of your server.

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