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The SMTP relay can be configured on a separate IIS 6.0 server or on the ISA Server 2004 firewall machine itself. The advantage of putting the SMTP relay... | By Durgesh Mishra | Facebook
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How to Set Up an SMTP Relay in Office 365
How to use Mail Contact object to enable outgoing SMTP relay
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Email 101: What Is an SMTP Relay and Why Do We Use It? - Business 2 Community