Phishing emails attempt to trick users into performing an action like clicking on a link that installs malware onto their computer.
DMARC is launching this week and has support from many major tech companies, including – perhaps most importantly – major web-based email providers Yahoo!, Google, Microsoft, and AOL. Other companies on board with the initiative include Facebook, LinkedIn, and PayPal. PayPal already works with Google and Yahoo! to block unwanted emails – as many as 200,000 per day. DMARC will likely make these kinds of efforts even more successful, particularly if all webmail providers back its efforts.
Webmail users will not have to take any action to get the benefits of DMARC. Instead, it will be up to webmail providers to implement the policies of DMARC.