I've heard so many arguments against this, I don't know where to start. Make sure, for starters, that if you use a custom domain for your email, you use a regi

I've heard so many arguments against this, I don't know where to start. Make sure, for starters, that if you use a custom domain for your email, you use a registrar with stellar security practices, as opposed to Namecheap, Godaddy, and many others that have shown deep flaws with vulnerabilities to social engineering. Otherwise, once someone has access to your domain, they have access to your email, which is the keys to the kingdom.