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Blocking Spam

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talcs

talcs

IS-IT--Management
Mar 25, 2003
86
GB
We seem to be getting quite a lot of spam even though we have a firewall, webshield etc in place. What I would now like to block, is spam coming in that is making use of our domain name. ie. Call us test.com. I would like to block any messages from test.com accounts that are NOT registered on our system- Not valid users. Is this possible?

I know you can block the entire domain name from coming in, but we will still require registered users being able to send from outside, in.

thanks for any help.
 
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