I'm running postfix on a host behind a firewall which performs a port address translation of the port 25 on the inbound connections, whilst the outbound connection gets a nat to a extranet address. The daemon supplies smtp service for the local network. An intranet dns resolves its hostname in a intranet address whilst the same fqdn is resolved to the extranet address used for the pat translation via a public dns. The extranet address used by the pat is other than the global address of the outbound connection. I haven't used the proxy_interfaces variable and it seems to be any problem. When the proxy_interfaces is necessary? Might I set it to the extranet address used by inbound connection?
Best regards Luca Cazzaniga
