postfix non-strict From

cipherus · Apprentice Joined: 07 May 2004 Posts: 174

I've set up postfix and I love it. Only problem I am having is that I tested telnet'ing to it (on localhost from a valid account) and I can set any From address and have it come out in the final email. Example result email:

--------------
Return-Path: lol@notreal.com
X-Original-To: test@realdomain.com
Delivered-To: test@realdomain.com
Received: from realdomain.com (localhost [127.0.0.1])
by realdomain.com (Postfix) with ESMTP id 50E4F3F52A
for <test@realdomain.com>; Sat, 24 May 2008 23:01:57 -0700 (PDT)
Message-Id: <20080525060208.50E4F3F52A@realdomain.com>
Date: Sat, 24 May 2008 23:01:57 -0700 (PDT)
From: lol@notreal.com
To: undisclosed-recipients: ;

LOL?
-------------

In the header it shows that it came from my real server. But it does not show which user sent it, and the From is a complete lie. Is there any way to enforce that which account sends the email is enforced as the Return-Path and From?

magic919 · Posted: Sun May 25, 2008 8:07 am Post subject:

You could map the users > email addresses and get Postfix to run a check, if that's what you want.

Worth a read http://www.postfix.org/postconf.5.html#reject_sender_login_mismatch

cipherus · Apprentice Joined: 07 May 2004 Posts: 174

Very helpful, exactly the informations I was looking for. Thank you very much, you are a gentleman and scholar.