Don't delete people's email!
All my email, some of it over 25 years old and very personal has been deleted. ALL email is gone. I think if you want to improve you could start by letting your customer's decide for themselves which email they want to delete.
You could also improve by giving me back my email!
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Oma Soutine
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If your account has had no activity for 365 days, then the account is deactivated. We communicate this a few times which includes sending you an email to your alternative email account, so make sure that is updated. If you need help reinstating, contact our CC team at help.yahoo.com. They have the tools to help with these issues. Hope this helps!