title: Which POSTFIX configuration for sending from localhost?
body: <p>I am in the process of configuring POSTFIX for use of mail() function in php.  I only want to send emails from localhost, and I am NOT interested in receiving emails.  This is for testing only.  </p>
  
  <p>My POSTFIX configuration choices are:</p>
  
  <ol>
  <li>No configuration</li>
  <li>Internet Site</li>
  <li>Internet with smarthost</li>
  <li>Satellite system</li>
  <li>Local only</li>
  </ol>