Windows 11 Autofill in Windows Mail

Hello and happy holidays everyone!
How can I clear the autofill drop down e-mail suggestions whenever I begin to type an address in Mail?

You see, I've accumulated tons of addresses from years of being a user, some are no longer valid, some I have no use for.

How can I clear the autofill, or just disable it entirely? Is it possible in Mail?

Also, can you suggest a better e-mail client? I like Mail, but it's pretty basic.

Thanks.