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Server is being used an an open relay to send spam mail

1) My Domino server is being used as an open relay host to send spam mail. How can I prevent this? I'm using version 5.0.9. The use of "*" in the deny list field under smtp inbound controls has been enabled, but it just prevents my users from sending mails. Error: Relaying denied because of a policy setting.

2) I have enabled DSN to allow delivery notifications to be delivered to users when an Internet mail is being sent to confirm delivery. But, it still does not return Delivery notifications and I have tested this in various domains. The message is delivered, but no delivery status notification is returned. I understand that if DSN is not enabled on both ends it will not function, but I have tested this with another server that I am sure DSN is enabled for, but got the same result.

Is there a bug with the release 5.0.9?
You need to set the outbound control as well as the inbound. For outbound sessions, simply put your domain or your IP range there for authorized senders. Leave the Deny list empty. Then for Outbound, put your people as the only authorized people. As for your second question, very few systems are going to allow return receipts for internet mail. I haven't seen one that lets it happen, so I wouldn?t waste your time on configuring or testing it.

Dig Deeper on Domino Resources - Part 6

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