We have had in the past i will call them “Bad People” registering similar domain names to the company I work for and send out phishing emails asking for bank info, they almost succeeded, was way too close.
So i went and bought all the similar domain names that i could get in order to stop others from doing so. So now i have about 20 similar domains but want to create a SPF record that indicates NOT to allow any emails from these domains. Is there a simple way to do this?
Thanks and to all a safe day!