No NDR for invalid addresses on specific domain
Posted on 2011-05-11
Our company is having issues receiving proper NDR's from invalid e-mail addresses on a specific domain. For example, using a fake address like firstname.lastname@example.org will not send a reply to us that the address is invalid. This works sending from other e-mail servers such as Gmail and Hotmail.
Looking at our message tracking center in Exchange 2003 shows the test messages being transferred to what looks like a proxy on their end (they are a Taiwan domain), but the message tracker ends there.