WotLK Authentication code not arriving for client login but received fine for website

[AdamSham]

I received an authentication code to my gmail when logging into this website however when I try to login to game and it asks for the coded I do not get sent an email.

[Thorbjorn]

Use the google authenticator for your phone. It's much better than e-mail confirmation. You have a graphical way of showing when it expires and it works instantly, you don't need to refresh anything (like you need to spam refresh on e-mail mailbox until it arrives) as it ticks out in real-time.