New order confirmation email is not being sent on Magento website

We have 2 methods to send the confirmation emails from our Magento 1 website.

1. Using Cron
2. Avoiding Cron

If you want to avoid the Cron :

Open the file order.php file from the following path:

app/code/core/Mage/Sales/Model/Order.php

Line#1356,1450

Change the following

    //$mailer->setQueue($emailQueue)->send(); 

to the following:

    $mailer-> send();

In the following path `app/design/frontend/base/default/template/checkout/success.phtml`:

add the following line Top success page for sending mail direct

    $order = Mage::getModel('sales/order');

    $incrementId = Mage::getSingleton('checkout/session')->getLastRealOrderId(); 

    $order->loadByIncrementId($incrementId);

    try{ 

    $order->sendNewOrderEmail();

    } catch (Exception $ex) { 

    echo "Email Not Sent..."; 

    }

    $customer = Mage::getSingleton('customer/session')->getCustomer();

    $email = $customer->getEmail();

    //End Email Sending