Changing password; not receiving email

Hi.  Thanks for any help.  I'm trying to retrieve a new password for my data plan account.  I enter my email address (not an ATT acount) and click "forgot password".  They say they will send a new (presummably) temporary password, but I never get the email.  It doesn't go to Junk either.  I thought that perhaps they send it to an ATT email account, but to the best of my knowledge, I never signed up for such an account.  Again, thanks for any help!