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SMTP relay server

Many connections are being made by external sources which is generating a lot of network traffic. How do I allow internal relaying for my domains but block external relaying?
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prodatagroup
Asked:
prodatagroup
2 Solutions
 
mass2612Commented:
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AmitspeedstarCommented:

The below article from technet will help u

http://support.microsoft.com/kb/895853/en-us

Amit .
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