Kind of a weird post, since it acknowledges in the first 1/3rd that you don't need DMARC for PCI compliance.
Took me too long to realize this has nothing to do with the Peripheral Component Interconnect or Direct Memory Access
> The best practice is a policy banning PAN over email, instant messaging, SMS, and chat entirely.
Sounds silly to me. A PAN should never even touch an employee's computer.
two words: compensating control.
(But also setup dmarc)
this article takes more time to read than dmarc takes to implement