Discussion forum for Enterprise Edition.
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I have a customer who has signed up for Postini, and he would like to make sure all mail he receives is filtered through this service. Is there a way I can block email not coming from Postini for his domain only?
Yes change the Advanced SMTP TAB->Inbound Authentication to "Authentication determined by post office". Then enable it for the post office and add the IPs of the Postini servers to the allow relay list.