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Exchange 5.5 Security configuration

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Hi
Would like to know how to secure a Exchange server from acting as a relay server .

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by lordinfidel

Must have at least sp2 installed, it is up to sp4.

Open up exch admin... Go to configuration/IMS/routing/routing restrictions/click hosts and clients that sucessfully authenticate.

Click ok/ok/ you will need to stop and start your IMS, done thru services.

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