Magento 1 - Email notification via Magento email queue

email_notify.php

<?php

public function emailNotify($event, $emailTemplate, $data, $toEmail)
{
    $data = array_merge($data, array('YYYYMMDDHHMMSS' => date('Ymdhis')));

    /* @var $template Mage_Core_Model_Email_Template */
    $template = Mage::getModel('core/email_template')->loadDefault($emailTemplate);
    $notifyTemplate = $template->getProcessedTemplate($data);
    $notifyTemplateSubject = $template->getProcessedTemplateSubject($data);

    // Send the mail to customer
    //$mail = Mage::getModel('core/email')
    //    ->setToEmail($emailTo)
    //    ->setBody($notifyTemplate)
    //    ->setSubject($notifyTemplateSubject)
    //    ->setFromEmail(Mage::getStoreConfig(self::EMAIL_FROM))
    //    ->setFromName(Mage::getStoreConfig(self::EMAIL_FROM_NAME));

    try {
        //$mail->send();

        /** @var $emailQueue Mage_Core_Model_Email_Queue */
        $emailQueue = Mage::getModel('core/email_queue');
        $emailQueue
            ->setEntityId($data['entity_id'])
            ->setEntityType($data['entity_type_id'])
            ->setEventType($event);

        $emailQueue->setMessageBody($notifyTemplate);
        $emailQueue
            ->setMessageParameters(
                array(
                    'subject' => $notifyTemplateSubject,
                    'is_plain' => true,
                    'from_email' => Mage::getStoreConfig(self::EMAIL_FROM),
                    'from_name' => Mage::getStoreConfig(self::EMAIL_FROM_NAME),
                    'reply_to' => $toEmail,
                )
            )
            ->addRecipients($toEmail, $toEmail);
        $emailQueue->addMessageToQueue();

        return true;
    } catch (Exception $error) {
        Mage::getSingleton('core/session')->addError($error->getMessage());
        //echo $error->getMessage();
    }
}