How to add multiple “Recipients” email address setting in Magento Admin Panel ?

To add additional Send Email TO/CC/BCC to this section, Open app\code\core\Mage\Contacts\etc\system.xml, and find below code

<recipient_email translate="label">
                  <label>Send Emails To</label>
                  <frontend_type>text</frontend_type>
                  <sort_order>10</sort_order>
                  <show_in_default>1</show_in_default>
                  <show_in_website>1</show_in_website>
                  <show_in_store>1</show_in_store>
  </recipient_email>