[Users] How to influence Return-Path and From: in Zimbra

[Barry de Graaff]

Hello Folks, 

I am working on the MTA part of the Zimbra Mailinglist crowdfunder, and would like your advice. 

What I try to do, is make Zimbra DL's sent mail the same way as mailman. 

Aka: 
Return-Path: users-bounces at lists.zetalliance.org 
Received: from [::1] (port=53390 helo=server1.openfactory.ch) 
by server1.openfactory.ch with esmtp (Exim 4.89) 
( envelope-from <users-bounces at lists.zetalliance.org> ) 
id 1e7PUI-002cCG-VR; Wed, 25 Oct 2017 19:29:06 +0200 
Received: from filter2.tophost.ch ([46.232.182.201]:37532) 
by server1.openfactory.ch with esmtps 
(TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) 
( envelope-from <info at barrydegraaff.tk> ) id 1e7PUI-002cC3-9n 
for users at lists.zetalliance.org; Wed, 25 Oct 2017 19:29:06 +0200 
Received: from trinity.hostingxs.nl ([213.207.93.66] 
helo=zimbra1.powercraft.nl) by filter2.tophost.ch with esmtps 
(TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) 
(envelope-from <info at barrydegraaff.tk> ) id 1e7PUG-0004S1-6n 
for users at lists.zetalliance.org; Wed, 25 Oct 2017 19:29:05 +0200 
Date: Wed, 25 Oct 2017 19:29:03 +0200 (CEST) 
From: Barry de Graaff <info at barrydegraaff.tk> 
To: Stefan =?utf-8?Q?S=C3=A4nger?= <stefan.saenger at gr13.net> 
Message-ID: <20703228.903.1508952543210.JavaMail.zimbra at barrydegraaff.tk> 
MIME-Version: 1.0 
Content-Type: multipart/alternative; 
boundary="=_ef844e01-95aa-4855-84cb-937756ba4db7" 
Subject: Re: [Users] Does anyone knows how to setup 2FA on Open source? We 
Errors-To: users-bounces at lists.zetalliance.org 
Sender: "Users" <users-bounces at lists.zetalliance.org> 

So what trick is used to change the envelope from? In red. 

Noah Price tells me that on top of that we should change to From header to `From: users at lists.zetalliance.org` 
for dmarc alignment. 


So far what I can make Zimbra do is add headers based on the To: header. So I can add 
stuff like Sender: ,Errors-To:, and List-Unsubscribe:. But the first 2 of those 
are not standard so I expect them to do noting much. 


My question for you guys, how can I influence the Return-Path and/or envelope-from in Zimbra? 
(https://en.wikipedia.org/wiki/Variable_envelope_return_path) 

Is this something that can be done with postfix? So far I looked into postfix_header_checks 
while that allows me to insert the headers and rewrite to:, I cannot change from: that way. 

Also looked into amavis (little desperate), that does allow adding tags to subject I guess. 

So if anyone has some pointers where I should look, let me know, otherwise I have to dig 
some more. There is a zimbraAutoSubmittedNullReturnPath... does does allow to change 
the return path to <> for auto-replies... not sure where that hooks into though. 

Thanks! 

Kind regards, 

Barry de Graaff 
Zeta Alliance Founder 
zetalliance.org | github.com/Zimbra-Community 

+31 617 220 227 
Fingerprint: 97f4694a1d9aedad012533db725ddd156d36a2d0 
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