...Or what a lot of systems do is prompt you for a secret question, and then the question's secret answer. Then when you want to reset the password, you need to answer the question. That then allows you to change your password even if you no longer have access to the email address associated with your account. Then from within the system you will be able to change the email.

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.