gistfile1.aw

<?php

$email_queue = drupal_queue_get('EmailQueue');
$email_queue->createQueue();

// Sending email to a user
$message = array(
  'to' => 'user@example.com',
  'subject' => 'The subject of this email',
  'body' => 'The body of this email',
  'headers' => array('From' => 'user2@example.com'),
);
$email_queue->createItem($message);