Can anyone confirm whether that this short article I wrote a while ago is "good enough" for avoiding spoofing? https://www.uxwizz.com/blog/stop-others-use-you

Can anyone confirm whether that this short article I wrote a while ago is "good enough" for avoiding spoofing? https://www.uxwizz.com/blog/stop-others-use-your-domain-emails https://www.uxwizz.com/blog/stop-others-use-your-domain-emai...