Hi, I'm trying to create a proxy with Nginx (1.11.2) in a dedicated VPS to a remote client mail server with a DDNS ip (hmailserver). I have two network interfaces in this VPS and i want to use one just for the mail proxy. Authentication, SMTP, POP3 and IMAP are all working fine. The first problem is that mail sent from this server is showing it's own IP (point 1 in attached picture). Of courby joaomourato - How to...