Hello Postfix-users, currently, I have two postfix servers running for my domain: - one on a physical server with a single, public IPv4 address (and proper DNS setup) that just accepts mails and delivers them to - the second one in my private LAN (where mails are delivered locally to the imap server).
This setup has various disadvantages, so I am thinking about about the following setup: Only one postfix in my private LAN, with a VPN connection to the public server, and some port forwardings so that my private postfix installation "appears" to run on the public IP address. Are there any known problems with this setup? I think it will probably just work, but I am afraid of private IP addresses showing up in mail headers that might trigger some spam detection mechanisms, or other non-obvious issues. Does postfix write its own, local IP address into outgoing mail? Should the last "received by" header of my outgoing mail match with the IP/hostname I am sending the mail from? Regards, Thomas Herrmann
