Magento – Send contact us emails to multiple recipients

If you check the IndexController.php in the Contacts module, you'll see a ->sendTransactional line in the postAction() method.

The 3rd parameter (Mage::getStoreConfig(self::XML_PATH_EMAIL_RECIPIENT)) can be an array of email addresses.

So the only thing you need to do is extend the controller (how to do this can be found here for example: http://www.magentocommerce.com/wiki/5_-_modules_and_development/0_-_module_development_in_magento/how_to_overload_a_controller

And then add multiple email address to your sendTransactional code:

$mailTemplate->setDesignConfig(array('area' => 'frontend'))
                    ->setReplyTo($post['email'])
                    ->sendTransactional(
                        Mage::getStoreConfig(self::XML_PATH_EMAIL_TEMPLATE),
                        Mage::getStoreConfig(self::XML_PATH_EMAIL_SENDER),
                        array('emailone@domain.com','emailtwo@domain.com'),
                        null,
                        array('data' => $postObject)
                    );

You cannot do this with Magento2 default installation. You will need to create a custom module that overrides the method sendEmail() from the \vendor\magento\module-contact\Controller\Index\Post.php:

private function sendEmail($post)
{
    $this->mail->send($post['email'], ['data' => new \Magento\Framework\DataObject($post)]);
}

As you can see by default it sends to only one email( the one you set in the admin panel). To create a custom module follow the video from here. And here is a nice tutorial about overriding classes.