How to pass Original recipeint by Postfix to procmail


Is there a way to identify the original recipeint of the email, in procmail and not via header?

The Recipient can be in Bcc and can also be in one of the To / Cc and i am looking for how to get the email who is the Recipient,

I found that if procmail is as the mailbox command then i can get ORIGINAL_RECIPIENT in environment as per document, but i do not get it,

Please help