I´m running V5 at a customer´s site with SMTP proxy enabled. As a huge amount of spam with nonexistent recipient addresses arrives every day, I´d like to reject these mails right on the Astaro. Turning on RCPT verification doesn´t help because they have Exchange 5.5 as internal mail server which accepts all mails before user verification. AFAIK there is no way of changing this behaviour, even in Exchange 2000.
Is there any way of configuring a RCPT whitelist via console or maybe some other solution?
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