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>

Add below code after above code in system.xml,

<recipient_email2 translate="label">
                        <label>Send Emails To</label>
                        <frontend_type>text</frontend_type>
                        <sort_order>11</sort_order>
<recipient_email2 translate="label">
<label>Send Emails To</label>
<frontend_type>text</frontend_type>
                        <sort_order>11</sort_order>
<show_in_default>1</show_in_default>
                        <show_in_website>1</show_in_website>
                        <show_in_store>1</show_in_store>
    </recipient_email2>