How can I find out the email address from my Steam account if I can't log in?

[Paul]

A few years ago I created a steam account for my girlfriend. I still have the login data, but when I log in I have to enter a Steam guard code. The problem is that I forgot the email address for the account.
Is there any way to find out the email address?

Sincerely,
Paul

[nullable]

How many email addresses do you have where you can't do an account recovery and go down the list?

Also this is a prime example why you should start using a password manager.

[Paul]

Originally posted by Brockenstein:

How many email addresses do you have where you can't do an account recovery and go down the list?

Also this is a prime example why you should start using a password manager.

I only created the email account so that I could create the steam account for her. That was six years ago. At that time I didn't know anything about steam guard.

I also just want to know the email address. Finding out the password shouldn't be the problem. Back then I used the same password for all my throw away accounts.

[Acroamatibus]

If you activated a CD key on this account you can contact Steam support by a ticket and send the CD Key as proof that you own this account.

If you didn't buy anything you can just create a new account.

[nullable]

Originally posted by Paul:

I also just want to know the email address. Finding out the password shouldn't be the problem. Back then I used the same password for all my throw away accounts.

Too bad you didn't use the same email for all your throwaways too isn't it? At any rate, the email address on the account isn't public information. So, you either remember it, do what Hotsauce and I have suggested, or you option C: You go through support and prove you own the account and recover it that way.