title: Attach custom email header for Amazon SES service
body: <p>I'm using Amazon SES to send emails, I would like to attach a custom header to it before it gets sent to users since I'm making a proxy email system, for replying to threads on my site, so the ID is kept for tracking which thread to post to with the email.</p>
  
  <p>I cannot see how I can attach a custom header from Amazon SES' documentation, apart from <a href="http://docs.amazonwebservices.com/ses/latest/DeveloperGuide/Headers.html" rel="nofollow">this page</a> which explains on what headers they accept but doesn't say how to bind it, I am using this <a href="http://sourceforge.net/projects/php-aws-ses/" rel="nofollow">SES wrapper</a> made for PHP.</p>
  
  <p>I want to be able to inject a header named <code>X-Thread-ID</code> with a number, how would I go on with this?</p>
  
  <hr>
  
  <p>EDIT: For Jack's answer, I cannot send an email properly, it keeps giving me this error:</p>
  
  <pre><code>CFSimpleXML Object
  (
      [Type] =&gt; Sender
      [Code] =&gt; InvalidParameterValue
      [Message] =&gt; Missing final '@domain'
  )
  </code></pre>
  
  <p>My headers is exactly like this</p>
  
  <pre><code>To: myemail@hotmail.co.uk &lt;YES&gt;
  From: developer@mysite.com &lt;MySite&gt;
  X-Thread-ID: 429038
  </code></pre>