Microsoft doesn't recognize the email I have associated with an account

[Microsoft Windows]

I am trying to log into a different Microsoft account, but when I put in the email address for this account, it says that the account is not recognized. I am certain that this account was at least at some point linked to this email, as going into Gmail I can see emails regarding it in my inbox in the past. Furthermore, when I try to log in from the accounts section in settings in windows 11, it recognizes the account but wants to send the verification code to the address "po*****@alteschach.tel", which I do not recognize. Is there any way to restore this account to a previously used email, or

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