Hello, we have followed these steps to create a second instance of postfix on our mail server:
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All the steps seem very straightforward. In the 2nd instance, we changed the port numbers from 25,26,27 to 18,19,20 so that there would not be a port conflict and the 2nd instance would be able to start. We have set the smtp_bind_address but we cannot get the 2nd IP to actually show headers associated with the 2nd instance when sending email out. We think there is a fairly simple fix for this but are not sure what we are doing wrong. We need someone to look over these files postfix ([url removed, login to view] and [url removed, login to view]) and postfix-out ([url removed, login to view] and [url removed, login to view]), the second instance, and help us to get this to work.