New order email confirmation not being sent (magento 1.9.1)

If your mail system(smtp, zend_mail) works fine; disabling mailQueue may solve your problem.

/app/code/core/Mage/Core/Model/Email/Template.php
Change Line 407

if ($this->hasQueue() && $this->getQueue() instanceof Mage_Core_Model_Email_Queue) {

To

if (false /\*$this->hasQueue() && $this->getQueue() instanceof Mage_Core_Model_Email_Queue\*/) {

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magento.stackexchange.com/questions/45571/new-order-email-confirmation-not-being-sent-magento-1-9-1

app/code/core/Mage/Checkout/Model/Type/Onepage.php line# 812 chnage $order->queueNewOrderEmail(); to $order->sendNewOrderEmail();

app/code/core/Mage/Adminhtml/Model/Sales/Order/Create.php line # change 1564 $order->queueNewOrderEmail(); to $order->sendNewOrderEmail();