Ruby on Rails

Frederick Cheung wrote in post #989578:
> Make sure that nothing is overwriting your Return-Path, I've come
> across mail servers that would rewrite that sort of stuff for you. (eg
> send a mail to an address you can read and check that the return path
> is the one you specified)

Ok, i just stripped out any extra headers (so i'm just setting to, from,
subject, and body) and then sent a mail with the from field set to my
yahoo email and the from field set to my gmail email.

Changing the addresses to protect the innocent, let's say that i set it
up as follows:

>> From: my-yahoo-address@yahoo.co.uk
>> To: my-gmail-address@gmail.com
>> Subject: "Hello dummy"
>> Body: "Hello dummy\n"

So, i sent that out, recieved it in gmail and inspected it, to see the
following:

>> Delivered-To: my-gmail-address@gmail.com
>> Received: by 10.52.156.164 with SMTP id wf4cs20192vdb;
>> Mon, 28 Mar 2011 05:29:27 -0700 (PDT)
>> Received: by 10.227.163.133 with SMTP id a5mr3664403wby.73.1301315366670;
>> Mon, 28 Mar 2011 05:29:26 -0700 (PDT)
>> Return-Path: <my-yahoo-address@yahoo.co.uk>
>> Received: from uk1w2c0067.eechost.net (uk1w2c0067.eechost.net [217.69.46.42])
>> by mx.google.com with ESMTP id u2si6545764wbd.60.2011.03.28.05.29.26;
>> Mon, 28 Mar 2011 05:29:26 -0700 (PDT)
>> Received-SPF: neutral (google.com: 217.69.46.42 is neither permitted nor
denied by best guess record for domain of my-yahoo-address@yahoo.co.uk)
client-ip=217.69.46.42;
>> Authentication-Results: mx.google.com; spf=neutral (google.com: 217.69.46.42
is neither permitted nor denied by best guess record for domain of
my-yahoo-address@yahoo.co.uk) smtp.mail=my-yahoo-address@yahoo.co.uk
>> Received: from ec2 ([75.101.135.251]) by uk1w2c0067.eechost.net with Microsoft
SMTPSVC(6.0.3790.4675);
>> Mon, 28 Mar 2011 13:30:03 +0100
>> Received: from localhost ([127.0.0.1] helo=ir.charanga.com)
>> by ec2 with esmtp (Exim 4.63)
>> (envelope-from <my-yahoo-address@yahoo.co.uk>)
>> id 1Q4BZV-00032m-Fq
>> for my-gmail-address@gmail.com; Mon, 28 Mar 2011 13:29:25 +0100
>> Date: Mon, 28 Mar 2011 13:28:39 +0100
>> From: my-yahoo-address@yahoo.co.uk
>> To: Dummy User <my-gmail-address@gmail.com>
>> Subject: Hello dummy
>> Mime-Version: 1.0
>> Content-Type: text/plain; charset=utf-8
>> Message-Id: <E1Q4BZV-00032m-Fq@ec2>
>> Return-Path: my-yahoo-address@yahoo.co.uk
>> X-OriginalArrivalTime: 28 Mar 2011 12:30:03.0500 (UTC)
FILETIME=[DCE862C0:01CBED43]
>>
>> Hello dummy

I tried again, setting the 'Return-Path' header when building the email,
but the "Return-Path" header in the received mail is still set to be the
same as the from address.

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