What is dmarc.io?
We launched dmarc.io to help operators, developers, deployers—anybody that deals with DMARC—by providing information on email sources to streamline DMARC adoption.
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If you are reading this, chances are you know something about email. You may have decades of experience or you may be just starting to figure it out. But you definitely understand the undeniable value of email as well as the importance of protecting it.
We’re here to help support you, no matter where you are on your journey. Stay current and informed with news and articles written by leading subject matter experts for people who are doing the real work of making email better.
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The State of DMARC in Switzerland
In 2024, Switzerland’s saw a 79% rise in reported phishing incidents and a 108% increase in phishing websites. In this piece, we research top Swiss bank and company domains to gauge DMARC adoption and enforcement.
An Email’s Journey
dmarcian Senior Account Manager Jason Crichton shares his insights on how an email moves from conception to the inbox and actions you can take to help it complete the journey.
New Laposte Email Rules: What Senders Need to Know About SPF, DKIM, DMARC
Laposte.net is one of France’s leading email service providers serving millions of users. It introduced mandatory email authentication requirements starting in September 2025.
Understanding CISA BOD 25-01 DMARC Requirements for Microsoft 365 and Google Workspace
In the Secure Cloud Business Applications project, BOD 25-01 provides secure baselines, including DMARC, for configuring Microsoft 365 and Google Workspace in the United States’ Federal Civilian Executive Branch.
Hosting Dynamic MTA-STS Policies for Multiple Domains with Cloudflare Workers
Requests about how to set up MTA-STS policies with Cloudflare are on the rise, so here's a guide that walks you through publishing MTA-STS policies for multiple domains with Cloudflare.