Thanks for sharing a helpful post to prevent spoofing. Nowadays, email is the quickest way to use your brand name. We all know hackers can use our email addresses to steal our data, money, etc. You have shared amazing tools that will help us to avoid malicious attacks. After reading your post, I'll prefer DMARC that is an online security tool that provides you DMARC record that uses DNS to allow, do nothing, or quarantine message. It's a great tool to become more secure. I'll try the trial version first.