How to prevent users sending / receiving internet e-mail

Using exchange 5.5.

SP3 installed as far as I can remember.

Currently many users have access to internet e-mail as well as internal.  For some of them, I want to prevent them sending or receiving internet e-mail.  I thought that I would just have to remove their internet e-mail address from the addresses tab in the properties section for each specific user.  However when I tried this today, this was not enough.  They could still send mail.


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jpmartenConnect With a Mentor Commented:
In Exchange admin, open up the properties of your IMC.

GO to the delivery restrictions tab, go to reject messages from and select "list" click on modify and choose which people you want to restrict.
By removing their SMTP addresses you only block them from RECEIVING mail to stop them from sending mail you need to restrict their access from the Internet Mail Service. You need to reject these users from the Internet Mail Service.

Hope this helps....

I need the points... lol!
gedacktAuthor Commented:
Ok but could you clarify the correct way to do this.

When you go to the Mail Connectors directory, and click on Internet Mail Connector, then the permissions tab. The two columbs serve two purposes. The columbs are in such a way that you can stop the sending of Internet email, but allow them to receive it only. If you edit the lists correctly and they will not be able do do either.
Also, if you removed the SMTP address, how are they receiving SMTP mail?
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