Hi, All! I'm trying to use single postfix instance for serving several domains. So let's say postfix hostname is mail1.hostmaster.com <http://mail1.hostmaster.com/> and it is used to send messages on behalf of client1.com <http://client1.com/> and client2.com <http://client2.com/>.
The issue is that these messages are identified by SPAM filters as untrusted. Most of them expect hostname to match served domain name. In case Postfix send each domain's outgoing messages from unique IP and this IP is whitelisted using DNS, it seems to make no difference. I wonder if there is a way to make postfix to use custom smtp banner (helo) based on IP address it is sending message from? Thanks, Anthony Ananich https://ananich.pro <https://ananich.pro/>https://ananich <https://ananich/>.pro
