If you ever get an odd email from someone, contact them about it through other channels. Don’t just reply to the email. Hackers may have taken control of the account for the purpose of sending emails out to people saying “Help, I lost my wallet as I’m travelling here in Nigeria and need you to wire money.” If the hackers are watching the account, they’ll just delete any warning emails from anyone, which is why you need to warn the person through other channels.