FooTester.php

<?php

namespace Acme\DemoBundle\Entity;

// use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * FooTester
 *
 * @ ORM\Table(name="FooTester")
 */
class FooTester
{
    /**
     * @var integer
     *
     * @ ORM\Column(name="id", type="integer")
     * @ ORM\Id
     * @ ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ ORM\Column(name="username", type="string")
     * @Assert\NotBlank()
     */
    private $username;

    /**
     * @var array
     *
     * @ ORM\Column(name="email_list", type="array")
     * @Assert\NotBlank()
     * @Assert\Count(
     *      min = "1",
     *      max = "100",
     *      minMessage = "You must specify at least one email",
     *      maxMessage = "You cannot specify more than {{ limit }} emails"
     * )
     * @Assert\All( constraints = {
     *    @Assert\NotBlank(),
     *    @Assert\Email(
     *        message = "The email '{{ value }}' is not a valid email.",
     *        checkMX = true
     *    )
     * })
     */
    private $emailList = array();

    public function addEmail($email)
    {
        $this->emailList[] = $email;
    }

    /**
     * @return array
     */
    public function getEmailList()
    {
        return $this->emailList;
    }

    /**
     * @param $emailList array
     */
    public function setEmailList($emailList)
    {
        $this->emailList = $emailList;
    }

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param string $username
     */
    public function setUsername($username)
    {
        $this->username = $username;
    }

    /**
     * @return string
     */
    public function getUsername()
    {
        return $this->username;
    }
}

FooType.php

<?php

namespace Acme\DemoBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class FooType extends AbstractType
{

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('id', 'integer');

        $builder->add('username', 'text');

        $builder->add(
            'emailList',
            'collection',
            array(
                'type'           =>  'email',
                'allow_add'      =>  true,
                'label'          =>  'Email',
                'error_bubbling' =>  true,
                'required'       =>  true,
                'options'        =>  array(
                    'required'       =>  true
                )
            )
        );
    }

    public function getName()
    {
        return 'email_array_test';
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class'      => 'Acme\DemoBundle\Entity\FooTester',
            'csrf_protection' => false
        ));
    }
}

WelcomeController.php

<?php

namespace Acme\DemoBundle\Controller;

use Acme\DemoBundle\Entity\FooTester;
use Acme\DemoBundle\Form\Type\FooType;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class WelcomeController extends Controller
{
    public function indexAction()
    {
        $fooObject = new FooTester();
        if (0) {
            $fooObject->setUsername('Foobar');
            $fooObject->addEmail('foo');

            return new Response(var_export($this->get('validator')->validate($user), true));
        } else {
            $form = $this->createForm(new FooType(), $fooObject);
            $form->bind(array('username' => 'Foobar', 'emailList' => array('foo')));

            return new Response(var_export(array('isValid()' => $form->isValid(), 'getErrors()' => $form->getErrors()), true));
        }
    }
}