Login trouble

I set up a WordPress blog quite some time ago. I am trying to revive it, but I can’t remember what e-mail address I used to log in. I suspect it’s an e-mail address I’m no longer using and have long forgotten about, so when I request my password, WordPress says it sent my password to my e-mail address — but I’m checking all of the e-mail addresses I can remember, and no e-mail from WordPress.

I was hoping to contact an administrator who could reset my entire login for me (login name, e-mail address & password), but can’t find a way to contact anyone. Please advise, and thanks in advance.