title: Reply-To Email header not working anymore
body: <p>First of all: My reply-to header always worked for 2 years.. Thunderbird never had a problem with it and still doesn't have any problem on my Mac.</p>
  
  <p>My shop contact form sends me the email from info@webshop.com and adds the reply-to header from the customer
  The source of the email is:</p>
  
  <pre><code>Return-path: &lt;sterntau@s207.rackspeed.de&gt;
  Envelope-to: info@sterntaufe-deutschland.de
  Delivery-date: Mon, 04 Nov 2013 18:00:05 +0100
  Received: from sterntau by s207.rackspeed.de with local (Exim 4.80.1)
  (envelope-from &lt;sterntau@s207.rackspeed.de&gt;)
  id 1VdNVV-001tmU-Gn
  for info@sterntaufe-deutschland.de; Mon, 04 Nov 2013 18:00:05 +0100
  To: =?utf-8?B?aW5mbw==?= &lt;info@sterntaufe-deutschland.de&gt;
  Subject: =?utf-8?B?S29udGFrdGZvcm11bGFy?=
  Reply-To: customer@gmail.com
  From: Sterntaufe-Deutschland &lt;info@sterntaufe-deutschland.de&gt;
  Date: Mon, 04 Nov 2013 17:00:05 +0000
  Content-Type: text/plain; charset=utf-8
  Content-Transfer-Encoding: quoted-printable
  Content-Disposition: inline
  MIME-Version: 1.0
  Message-Id: &lt;E1VdNVV-001tmU-Gn@s207.rackspeed.de&gt;
  
  =0A=0AName: Test=0AE-Mail: customer@gmail.com=0ATelefon: =0A=0AKommentar: Test
  </code></pre>
  
  <p>Normally it should reply to customer@gmail.com which always worked till yesterday.
  From yesterday its not working anymore. On all emails! Even on those where it worked before.
  But it works fine if I send a normal E-mail from my Gmail account to my info@webshop.com account.
  Reply-To works like it should then. Just not for the contact form
  Thunderbird recognizes the reply-to email as it shows "Reply to: customer@gmail.com" below the subject. But still uses my info@webshop.com when I click "reply"</p>
  
  <p>I also tried to re-install thunderbird, install thunderbird on a clean VMware. Install Thunderbird on another laptop.. all the same.
  But it still works with Microsoft outlook</p>
  
  <p>Please help me</p>