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You can probably do it in system manager:<br />
<br />
System Manager --&gt; Connectors --&gt; &lt;your smtp connector&gt; (right clikc and properties)<br />
Choose the Address Space Tab... I belive you can restrict it from here<br />
<br />
Hope this helps
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You can probably do it in system manager:

System Manager --> Connectors --> <your smtp connector> (right clikc and properties)
Choose the Address Space Tab... I belive you can restrict it from here

Hope this helps

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add users that has permission to send internet mail to a user group. then in system manage/connector/&lt;smtp connector&gt; to allow that particular group of users only.<br />
<br />
-corra[isat]
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add users that has permission to send internet mail to a user group. then in system manage/connector/<smtp connector> to allow that particular group of users only.

-corra[isat]

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How do you stop all users from sending externally?
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How do you stop all users from sending externally?

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yeah, hope it help. :)<br />
<br />
-corra[isat]
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What is the best way to allow users on an exchange 2003 server to only send email to each other and stop users from sending to emails outside of our domain / the outside world?
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What is the best way to allow users on an exchange 2003 server to only send email to each other and stop users from sending to emails outside of our domain / the outside world?

Exchange 2003 - Only allow internal email - No external email

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.