Hi I am trying to register an email address to a new microsoft account (my wifes email address) and I get the error "This email address is part of a reserved domain such as live.com, hotmail.com, or msn.com. Please enter a different email address."

I have my email address registered on a microsoft account ok and we are both on the same domain, mine is fine, can you please let us know what we need to do to get this email address registered.  the domain name our email addresses are part of is  @bigpond.com.

Thanks