Can't remember email for double authentication

I think I already know the answer to my problem but anyway...I've been offline for about 4-5 years and today I decided to log back on my 3 accounts but I can't for my life remember the email attached to one of them (I had to create an email account only for that one), I have the user and password but can't get to the double authentication part because I can't remember the email address attached to the account. Right now the account is currently locked for trying different codes like a moron, is there anything that can be done or is it lost for good? Thanks.