Well Google and Yahoo are getting hard line on DMARC and using this to reduce phishing, will you comply too?
Frankly, I think this is a marketing/product strategy, not a security one. These email providers (Gmail, Outlook/hotmail, Yahoo) basically are trying to corner the market on email. Eventually (if we aren't close to being there now), it will be you will have to use their services to send email to anyone else using their services.
The insincerity of this effort is borne out in the volume of tracking promulgated by these organizations and the way they handle email. They don't care about security. They care about connecting your wallet to whoever pays them to do it.
There are validation websites for all three, so it is pretty easy to determine one's current posture.
And kudos to Google and Yahoo for raising the bar, as well as to those who raised the bar before them.
From the article.... "88 per cent of Fortune 500 companies using DMARC" ... "34 per cent of the Top 5,000 global companies".
My take on this: companies too small to have dedicated email staff ought to outsource email to a big SAAS provider. Their setup instructions generally tell you exactly what needs to go into your DNS records so the provider can keep it ever-fresh.