Remove Private IP Address of Client From Email Header

[cyberzork]

See this thread on that topic.

Hide client IP in email headers

It seems emClient sends out my private/lan IP to the SMTP server. For example, in an Email sent out by emClient, the header contains Received: from [192.168.1.2] (example.com [1.2.3.4]) by mail.example.com (Postfix) with ESMTPSA id 92CD297DEA; It is fine that the SMTP server records the public IP (1.2.3.4) as it is what it sees. But only emClient can get my lan IP (192.168.1.2 here, as the SMTP server on the Internet can’t find that) and it sent the info to the SMTP server. How to make emCli…