DMARCbis Explained: Changes, Implications for Senders and Receivers

Fri, 19 Jun 2026 00:00:00 +0000

In May 2026, the IETF officially published DMARCbis — the new version of the DMARC (Domain-based Message Authentication, Reporting, and Conformance) standard. This update replaces RFC 7489 from 2015 with three new documents: RFC 9989, RFC 9990, and RFC 9991.

But what actually changes? Is this a revolution or an evolution? What are the concrete implications for you — whether you’re a domain administrator, email service provider, or email security specialist?

DMARCbis Practical Guide: Protect Your Domain, Manage New Reports

Fri, 19 Jun 2026 00:00:00 +0000

You’ve read the technical article on DMARCbis? Good. Now, the real question: what do I actually do with my domain?

This guide is for you, whether you’re a DNS administrator, security officer, or business owner. You’ll find a progressive action plan, concrete examples, and a pre-production checklist.

Goal: Protect your domain against spoofing without breaking legitimate email flows.

Step 1: Audit Your Current Configuration

Retrieve Your DMARC Record

Look up the TXT record _dmarc.yourdomain.com in your DNS manager, or use an online tool like senderaudit.com.

RFC 9989 on Sender Audit Blog

DMARCbis Explained: Changes, Implications for Senders and Receivers

DMARCbis Practical Guide: Protect Your Domain, Manage New Reports

Step 1: Audit Your Current Configuration

Retrieve Your DMARC Record