In transactional mail, I need to add a custom attribute.
I modified the below files app/design/frontend/base/default/template/email/order/items/order/default.phtml app/design/frontend/base/default/template/email/order/items/invoice/default.phtml
But changes are not reflecting on a mail.
I also flushed the Magento cache.
How can I modify transactional mail?