extend spoofing tools to the dektop app
have your system test if a domain is registered or not then reject all incoming emails that do not have a registered domain.
Yahoo mobile app will notify you at times when an email might be a spam or display a visual alert notification of a spoofed email address, giving you the option to report the email or block the user.
the dektop app dose not do this and it is difficult to tell if a email is spoofed.
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