title: Reply link in email body
body: <p>I need create in e-mail link to reply. When I press this link, I need that open a reply letter whith custom body, got into chain of letters.</p>
  
  <p>I tryed use that:</p>
  
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  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;a href="mailtoadmin@mail.com?subject=Re: subject&amp;body=custom body" target="_parent"&gt;mail to me in parent&lt;/a&gt;</code></pre>
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  <p>but this create a new letter, not reply.</p>
  
  <p>When I press "reply" in letter and send new letter, it has keys in the header "In-Reply-To" and "References" (link to original letter). When I write new letter, his don't have this keys.</p>