Magento force sending emails after order successful

Magento was not sending email notification to customer and magento web store owner after new order was placed. When I checked order in admin it was showing "Customer Notified" with a green tick but no one were receiving any notifications.

When I was updating order through admin, customer was getting notifications.

After a quick look, I couldn't find the issue as there were so many custom extensions on this client and not sure if any of them was interfering. So, I decided to write an observer that will be called after every successful order placement.

file: /trunk/wholesale/app/code/local/Technooze/Checkout/etc/config.xml

<config>
    ...
    <global>
		...
        <models>
            <technooze_checkout>
                <class>Technooze_Checkout_Model</class>
            </technooze_checkout>
        </models>
        <events>
            <checkout_onepage_controller_success_action>
                <observers>
                    <sendOrderEmails>
                        <type>singleton</type>
                        <class>Technooze_Checkout_Model_Observer</class>
                        <method>sendOrderEmails</method>
                    </sendOrderEmails>
                </observers>
            </checkout_onepage_controller_success_action>
        </events>
    </global>
</config>

file: /trunk/wholesale/app/code/local/Technooze/Checkout/Model/Observer.php

<?php
class Technooze_Checkout_Model_Observer
{
    public function sendOrderEmails(Varien_Event_Observer $observer){
        $orderIds = $observer->getData('order_ids');
        foreach($orderIds as $_orderId){
            $order = Mage::getModel('sales/order')->load($_orderId);
            try {
                $order->sendNewOrderEmail();
                Mage::log('email sent');
            } catch (Exception $e) {
                Mage::logException($e);
            }
        }
        return $this;
    }
}

Added store owner's email address at:

admin / system / configuration / SALES / Sales Emails / Order /

Send Order Email Copy To: owner's email

Send Order Email Copy To: Bcc or Separate Email

Deleted cache and test. I was able to finally get emails on every new order placed. So the issue is solved. Below files and functions helped me to resolve this issue:

file: /trunk/wholesale/app/code/core/Mage/Checkout/Model/Type/Onepage.php

public function saveOrder(){... $order->sendNewOrderEmail(); ...}

file: /trunk/wholesale/app/code/core/Mage/Checkout/controllers/OnepageController.php

public function successAction(){... Mage::dispatchEvent('checkout_onepage_controller_success_action', array('order_ids' => array($lastOrderId))); ...}

file: /trunk/wholesale/app/code/core/Mage/Sales/Model/Order.php

   /**
     * Sending email with order data
     *
     * @return Mage_Sales_Model_Order
     */
    public function sendNewOrderEmail()
    {
        if (!Mage::helper('sales')->canSendNewOrderEmail($this->getStore()->getId())) {
            return $this;
        }

        $translate = Mage::getSingleton('core/translate');
        /* @var $translate Mage_Core_Model_Translate */
        $translate->setTranslateInline(false);

        $paymentBlock = Mage::helper('payment')->getInfoBlock($this->getPayment())
            ->setIsSecureMode(true);

        $paymentBlock->getMethod()->setStore($this->getStore()->getId());

        $mailTemplate = Mage::getModel('core/email_template');
        /* @var $mailTemplate Mage_Core_Model_Email_Template */
        $copyTo = $this->_getEmails(self::XML_PATH_EMAIL_COPY_TO);
        $copyMethod = Mage::getStoreConfig(self::XML_PATH_EMAIL_COPY_METHOD, $this->getStoreId());
        if ($copyTo && $copyMethod == 'bcc') {
            foreach ($copyTo as $email) {
                $mailTemplate->addBcc($email);
            }
        }

        if ($this->getCustomerIsGuest()) {
            $template = Mage::getStoreConfig(self::XML_PATH_EMAIL_GUEST_TEMPLATE, $this->getStoreId());
            $customerName = $this->getBillingAddress()->getName();
        } else {
            $template = Mage::getStoreConfig(self::XML_PATH_EMAIL_TEMPLATE, $this->getStoreId());
            $customerName = $this->getCustomerName();
        }

        $sendTo = array(
            array(
                'email' => $this->getCustomerEmail(),
                'name'  => $customerName
            )
        );
        if ($copyTo && $copyMethod == 'copy') {
            foreach ($copyTo as $email) {
                $sendTo[] = array(
                    'email' => $email,
                    'name'  => null
                );
            }
        }

        foreach ($sendTo as $recipient) {
            $mailTemplate->setDesignConfig(array('area'=>'frontend', 'store'=>$this->getStoreId()))
                ->sendTransactional(
                    $template,
                    Mage::getStoreConfig(self::XML_PATH_EMAIL_IDENTITY, $this->getStoreId()),
                    $recipient['email'],
                    $recipient['name'],
                    array(
                        'order'         => $this,
                        'billing'       => $this->getBillingAddress(),
                        'payment_html'  => $paymentBlock->toHtml(),
                    )
                );
        }
        $this->setEmailSent(true);
        $this->_getResource()->saveAttribute($this, 'email_sent');
        $translate->setTranslateInline(true);

        return $this;
    }

Let me know if there is easier method.