> Also funny that the author calls DMARC 'modern practice', since DMARC was introduced in March 2015, almost 7 years ago. Oh come on, in terms of protocols, th

> Also funny that the author calls DMARC 'modern practice', since DMARC was introduced in March 2015, almost 7 years ago. Oh come on, in terms of protocols, that's modern. Your other points have merit but that's just a pointless dig at the author.