I remember my username but I don’t remember what email address I used to sign in. What can I do?

What can I do to get my account back?? I haven't played in a while and I wanna sign back up to keep playing on my old servers but all my usual emails aren't working and/or redirect me to different accounts 🙁

PS; I know my password and my remote ID, I just don't remember which of my emails I used to create it. I do have enough info to prove it's mine...