A server I run (let's say mail.example.com) inserts a mail header
similar to the one below, when it receives mail either via normal
SMTP from another MTA, or when it receives mail from an authenticated
MUA.
Received: from [10.10.10.10] (1.1.200.192.example.com [192.200.1.1])
by mail.example.com (Postfix) with ESMTPSA id AAAAAAAAA;
Sun, 12 Feb 2012 19:54:19 +0000 (GMT)
In this example, 10.10.10.10 is behind a NAT, the external IP
address being 192.200.1.1.
In the case of authenticated MUA submissions (only) I do not want to
leak the actual IP address - in fact I'd prefer not to put any "from"
information in at all. I think I need a Received: line still.
I don't want to remove this for mail from other MTAs which do not
authenticate.
Any ideas how I do this?
--
Alex Bligh
