The Global Cyber Alliance (GCA) has promoted the Domain-based Message Authentication, Reporting & Conformance (DMARC) protocol. The GCA has released an online tool that shows which domains have adopted DMARC as well as the adoption rate in various regions and industries. Most major consumer email services, including Microsoft Office 365, Google Gmail, and Yahoo, already employ DMARC. The Leaderboard is a work in progress, built on the list of domains that GCA is able to get from partner organizations.”]