How do I change my domain name without losing my email associated with the old domain?

I have a Yahoo Small Business website, and numerous email addresses connected with that website, and don't want to lose them, because I like having all my email accounts in one place. However, over the years, my interests have changed, and I want to create a website with a different domain name. How can I... show more I have a Yahoo Small Business website, and numerous email addresses connected with that website, and don't want to lose them, because I like having all my email accounts in one place.
However, over the years, my interests have changed, and I want to create a website with a different domain name. How can I change the name without losing the email associated with the old domain.
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