troubleshooting Question

Microsoft, Exchange 2003, Relaying spam... need to lock down asap

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esphelpdesk asked on
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Our exchange server(s) is being used to spam.  It is open in two ways:

It is relaying any email from within our network to the outside from any domain and user
It is relaying OUTSIDE our network from people forging usernames without password.
How do I fix? Help!


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