Dear customer,
To modify the SMTP email sending in Magento, you must access the following file:
app/code/core/Mage/Core/Model/Email/Template.php
And modify the getMail() function to look like this:
public function getMail() { if (is_null($this->_mail)) { $my_smtp_host = Mage::getStoreConfig('system/smtp/host'); $config = array( 'port' => '587', 'auth' => 'login', 'username' => 'YourEmail', 'password' => 'YourEmailPassword'); $transport = new Zend_Mail_Transport_Smtp($my_smtp_host, $config); Zend_Mail::setDefaultTransport($transport); $this->_mail = new Zend_Mail('utf-8'); } return $this->_mail; }