Hello, We know that a certain IP range contains no MTA's, but hosts websites for a lot of domains that have no email service, i.e., those domains have A records in that range but no MX records at all.
Our Postfix server regularly receives messages over MSA where the sender and recipient addresses are the same, and in one of those domains. Because the domain has a valid A record, there's nothing wrong with those messages that Postfix can detect, so the messages get accepted. Then because there is no MTA running at that IP address, they sit in the outbound queue for five days, bounce, and the bounce sits in the outbound queue for five more days. Is there a way to: A) Selectively identify a message based on the IP address of the MTA it would be delivered to. B) Reject such messages in the MSA connection or, at a minimum, keep them from building up in the outbound queue? Thanks for any suggestions!
