Cloudflare Analyzed 450 Million Emails: 46% Failed DMARC — and That Is Not Even the Biggest Problem

Mon, 25 May 2026 08:00:00 +0000

Cloudflare published its 2026 Threat Intelligence Report in March, and the email security chapter deserves more attention than it received in the broader coverage of the report. The headline finding that nation-state actors and cybercriminals are shifting from breaking into systems to simply logging in with stolen credentials is real and well-documented. What got less coverage is how those credentials are being stolen in the first place — and what the authentication data behind 450 million analyzed emails reveals about the state of email security across the internet.

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Cloudflare Analyzed 450 Million Emails: 46% Failed DMARC — and That Is Not Even the Biggest Problem