DMARC, which stands for Domain-based Message Authentication, Reporting, & Conformance, is a specification that defines how email can be authenticated by receivers and how they can report the authentication results back to the sender. The specification was published in 2012, and it is now celebrating its second year of having a positive effect in protecting consumer inboxes from spoofed email.
Illustrating this trend, PayPal stated that customer reports of suspicious email dropped in the U.S. by more than 70% during 2013. Microsoft also announced that reports of phishing by users of Outlook.com dropped by more than 50% in 2013 over 2012. These trends clearly underscore the fact that less malicious email is being delivered to consumer inboxes, with DMARC being an important contributing factor.
“Implementing DMARC stopped nearly 25 million attempted attacks on our customers during the 2013 holiday buying season alone,” said Trent Adams, Chair of DMARC.org and Senior Advisor on email security for PayPal and eBay Inc. “Not only is DMARC shutting down spoofed domain attacks, but it has also cut the overall volume of daily attacks in half since 2012.”
While not every mailbox provider has added DMARC protection, users with email accounts operated by Google, Yahoo, Microsoft, AOL, Comcast, Netease, Mail.ru, and XS4All are protected today. This covers almost 2 billion accounts worldwide, protecting senders such as Amazon, American Greetings, DocuSign, Facebook, Fidelity Investments, JP Morgan Chase, LinkedIn, LivingSocial, PayPal, and Twitter.
As a major mailbox provider, Google has seen how effective implementing DMARC can be. In December Google reported that over 90% of emails received by Gmail users are now authenticated by DKIM or SPF, the underlying authentication mechanisms used by DMARC. Further, they report that over 80,000 domains have already published policies via DMARC allowing them to reject unauthenticated messages.
“We are very pleased with the industry adoption of DMARC, and the positive impact on protecting Gmail’s users from spoofing and phishing attempts”, said Google Product
Manager John Rae-Grant. “As more of the industry adopts DMARC, we’re increasingly able to reject hundreds of millions of fraudulent messages each week. This improves our ability to protect Gmail users and many brands that were previously targeted by spoofers and phishing attempts. For example, we saw a reduction of 5000% in the amount of spoofing email claiming to be from a major corporation during their busiest season after implementing a DMARC reject policy.”
“DMARC protects more than 85% of the people who receive email from Facebook,” said Michael Adkins, Production Engineer at Facebook. “That level of adoption has significantly diminished the financial incentive for criminals to spoof our domains, so they’ve moved on to other targets. People can trust their inboxes more as a result. We’re proud to have been one of the first companies to deploy the DMARC specification at scale, and we’re excited to see so many others achieving great results.”
In the process of deploying DMARC, Twitter first took advantage of its reporting features to identify the scope of abuse against their domains. During the first 45 days of initial monitoring, Twitter saw nearly 2.5 billion messages spoofing its domains. The spoofed messages exceeded 110 million per day at their peak. Once Twitter moved to a DMARC “reject” policy, the number of spoofed messages dropped to only a few thousand within days.
“DMARC was eye-opening for our security team at Twitter,” said Josh Aberant, Postmaster at Twitter. “We found massive amounts of abuse from both our domains and look alike domains we’d claimed. Using DMARC to protect these domains and stop forgeries is a core component of how we protect our users.”
“Since the introduction of email cyber criminals have been hard at work determining ways to corrupt and exploit this communication channel,” said Patrick Peterson, founder and CEO of Agari. “The drastic reduction in attempted email fraud, even across multiple domains, is due primarily to the protections provided by the DMARC standard. For example, one of our prominent financial services clients saw spoofing levels drop an amazing 67% after publishing its DMARC reject policy in the fall of 2013.”
Return Path, a provider of email brand protection, reports similar results. “awareness of DMARC prompts more senders to make the protection of consumers and brands a priority, Return Path has seen a 130% increase in both clients and domains publishing valid DMARC records over the last twelve months alone, and that growth is only accelerating,” said Matt Blumberg, CEO of Return Path. “Within the span of two years DMARC has introduced a sea change in email security, and the remaining brands that leave themselves and their customers vulnerable to fraud are taking unacceptable risks.”
“In just the last 90 days alone, DMARC has blocked over one hundred thousand messages across multiple sending domains, helping to protect the Publishers Clearing House brand and consumers from potential email threats,” said Sal Tripi, Assistant Vice President of Digital Operations & Compliance at Publishers Clearing House. “We believe that online businesses have a responsibility to protect users from phishing and other email abuse. We feel that protecting our members with DMARC is critical to future success of not only our business, but the vitality of the online marketplace in general. DMARC allows us to provide instructions to receivers on how to handle mail received without proper authentication. The implementation and expansion of DMARC is one of the most noteworthy developments in the email industry in the last few years.”
Organizations interested in DMARC are encouraged to visit DMARC.org where there is a comprehensive overview of the technology as well as links to the specification, discussion lists, and support resources.
DMARC.org (Domain-based Message Authentication, Reporting and Conformance) is an unincorporated working group made up of many of the world’s leading email providers (AOL, Comcast, Google, NetEase, Outlook.com, Yahoo! Mail), financial institutions and service providers (Bank of America, Fidelity Investments, J.P. MorganChase, PayPal), social media properties (American Greetings, Facebook, LinkedIn) and email security solutions providers (Agari, Cloudmark, Return Path, Trusted Domain Project). The group is dedicated to developing Internet standards to reduce the threat of email phishing and to improve coordination between email providers and mail sender domain owners.
Return Path is the worldwide leader in email intelligence. We analyze more data about email than anyone else in the world and use that data to power products that ensure that only emails people want and expect reach the inbox. Our industry-leading email intelligence solutions utilize the world’s most comprehensive set of data to maximize the performance and accountability of email, build trust across the entire email ecosystem and protect users from spam and other abuse. We help businesses build better relationships with their customers and improve their email ROI; and we help ISPs and other mailbox providers enhance network performance and drive customer retention. Information about Return Path can be found at returnpath.com.