Magento add email to billing and shipping address - email

Question

I would like to add email adress of my clients to billing and shipping address.
To do that, I have tried to add var order.getCustomerEmail(), var email into html address template. But it doesn't fill it in.
Code example:
{{depend prefix}}{{var prefix}} {{/depend}}{{var firstname}} {{depend middlename}}{{var middlename}} {{/depend}}{{var lastname}}{{depend suffix}} {{var suffix}}{{/depend}}<br/>
{{depend company}}{{var company}}<br />{{/depend}}
{{if street1}}{{var street1}}<br />{{/if}}
{{depend street2}}{{var street2}}<br />{{/depend}}
{{depend street3}}{{var street3}}<br />{{/depend}}
{{depend street4}}{{var street4}}<br />{{/depend}}
{{if city}}{{var city}}, {{/if}}{{if region}}{{var region}}, {{/if}}{{if postcode}}{{var postcode}}{{/if}}<br/>
{{var country}}<br/>
{{depend telephone}}T: {{var telephone}}{{/depend}}
{{depend fax}}<br/>F: {{var fax}}{{/depend}}
**<br/>Email: {{var order.getCustomerEmail()}}**
{{depend vat_id}}<br/>VAT: {{var vat_id}}{{/depend}}
Can it be because of not registered users? But they are also required to enter an email address.

Answer 1

If you want the customer's email in sales order email, change the below file
\app\code\core\Mage\Sales\Model\Order.php
locate the function sendNewOrderEmail()
$email =$order->getCustomerEmail();
$mailer->setTemplateParams(array(
'order' => $this,
'billing' => $this->getBillingAddress(),
'payment_html' => $paymentBlockHtml,
'email' => $email
)
);
Now you can access this variable like
{{var email}}
NOTE I will advice not to make changes in the core file