Cognizant — To check if Requirement mail is fake or original

I have applied to PAT position and I have received a mail saying that I have been selected for the selection process. I would like to confirm if its an original mail or a fake one. I have received the email from [protected]@cognizant.com. A person who said that he is a job broker asked me to pay 4k after receiving this selection mail.
I have received the mail to [protected]@gmail.com