Hello
I have two system, Mail server and SMTP Proxy(Nethserver) and I try to hide IP from Local mail server, it means when I sent to gmail.com as shown Original Message, there is show my local IP like a
1x.xx.xxx.xxx
Here is information
Received: from mail.xxxx.xxx (unknown [1x.xx.xxx.xxx]) by xxxx.xxxx.com (Postfix) with ESMTP id xxxx03 for
Maybe @stephdl and @davidep can be more useful than me on this.
I only could say that removing the header could lead to some unexpected issues for sieve and other things.