title: Basic mail function (PHP) additional "-f" parameter question
body: <p>Is the <code>-f</code> additional parameter correctly set in this mail function.</p>
  
  <pre><code>@mail("example@exmaple.com.uy",$title,$body,$headers,"-f");
  </code></pre>
  
  <p>I am Getting the <code>X Warning</code> from some servers.</p>
  
  <p>Sorry for the basic question but some parts of the <a href="http://php.net/manual/en/function.mail.php" rel="noreferrer">documentation</a> got me confused (specially some user comments).</p>
  
  <p>Thanks in advance!</p>