DMARC stands for Domain-based Message Authentication, Reporting and Conformance. It is the simple, trusted, free solution that brings together email authentication protocols, and adds reporting and compliance.

There is growing support for DMARC. In June 2016, the U.K. government mandated that all U.K. government departments adopt DMARC, and the EU-CERT has also made a recommendation for the use of DMARC. In October 2017, the U.S. Department of Homeland Security issued Binding Operational Directive 18-01, which requires the adoption of DMARC by federal civilian domains.

GCA discovered, however, that despite the tremendous benefits of DMARC, it was not being widely deployed in the public or private sectors. We wanted to make it easy and affordable for any organization or user to implement DMARC. So GCA created the step-by-step DMARC Setup Guide, available in 18 languages, to help organizations of all sizes to implement DMARC.

Protect your email. Implement DMARC today.


GCA recognized the value of DMARC, and the need for a way to implement it on a broad scale. As a nonprofit startup, we needed a cost-effective way to do it, so we developed the DMARC Risk Scanner. This tool can scan hundreds of domains at one time to allow an organization to assess the DMARC implementation of their own domains, subcontractors and other partners. This enables an organization to better understand, and act upon, the risk imposed on it by its partners who have not implemented DMARC.

Get the scanner so you can better understand what email security protections are in place for your organization and partners.

Measuring the Economic Impact of DMARC

In just a few short years, GCA’s DMARC initiative has resulted in more than 5,700 organizations across more than 180 countries adopting DMARC. This has lead to estimated financial benefits of more than $19 Million USD in 2018 across a diverse array of industries and governments. Learn about the full economic benefits of GCA’s DMARC initiative in our impact report.

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