gistfile1.php

<?php
namespace Mail;

use Zend\ServiceManager\ServiceLocatorInterface;

return array(
    'initializers' => array(
        function ($instance, ServiceLocatorInterface $serviceLocator) {
            if ($instance instanceof Service\MailAwareInterface) {
                $mailService = $serviceLocator->get('Mail\Mail');
                $instance->setEmailService($mailService);
            }
        }
    ),
    'factories'    => array(
        'Mail\Mail'      => 'Mail\Service\EmailFactory',
        'Mail\Renderer'  => 'Mail\Service\RendererFactory',
        'Mail\Transport' => 'Mail\Service\TransportFactory'
    ),
);