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open mail relay on Exchange 5.0

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garystrauss

garystrauss

Programmer
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Jan 18, 2002
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Does anyone know how to stop an Exchange 5.0 server from being an open mail relay. We will be upgrading to Exchange 2000 later but need to get this fixed now.

Any help is appreciated

 
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Go into Internet Mail Service and then go to the Routing Restrictions Button. There you must have: The Users must have Authentication Check box checked. Jimmy
Sys Admin
 
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The actual Check boxes name is: Hosts and clients that successfully authenticate must be checked to close open relay on exchange Jimmy
Sys Admin
 
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