If you do not receive the PIN, please use PIN 77777, and we will check your transaction manually. It is likely the same problem that plagues other Gmail users.
Gmail actually worked for me yesterday, but not Hotmail.
However, I think this may have nothing to do with email domain, but rather with whether the user does or does not enter a name/nick (optional).
I tried twice with no luck, but once I did enter a nickname, the email came through immediately.
This may have been a coincidence, but I would check this on your side guys.