I never receive any mail, I am sure, in my experince when I buy a card inmediately recibe a mail with the card, in that case I dont got any mail notification in my mailbox only my bfp gone, then I searched information in the fórum and in the beginner chat channel of the game in order to know if maybe anyone else had the same problem, I found a recomendation of deleting an old mail, maybe my mailbox was full, then doing that I would recieve the mail with the card, I deleted 2 old mail, I had the precaution of opening the old mails before deleting them but didnt see any card in the mails.