So, what does DMARCbis bring to the table - and how can your organization prepare?

What´s New in DMARCbis?

DMARCbis builds on years of real-world experience with DMARC. Some of the most notable updates include:

  • Refined Organizational Domain Discovery
    DMARCbis introduces a clearer method (Treewalk) for determining the organizational domain, making alignment checks more reliable across complex domain structures.

  • The New np Tag
    This allows you to set a different policy for subdomains - offering more flexibility and reducing the risk of over-enforcement or under protection.

  • Deprecation of pct Tag
    The pct (percentage) tag is being deprecated. Under DMARCbis, it is expected that domain owners fully enforce their policy rather than applying it partially.

  • Cleaner Structure and Better Guidance
    DMARCbis restructures the original spec for better readability and adds improved examples, making it easier to implement and audit.

What This Means for Organizations

These updates are designed to:

  • Simplify deployment

  • Improve policy accuracy

  • Reduce ambiguity

  • Strengthen protection against spoofing and phishing

But with these changes comes a need to adapt

How Excedo can help with DMARCbis

At Excedo, we are already preparing clients for the DMARCbis era. Here is how we support your journey from the current DMARC standard to the upcoming DMARCbis:

✅ Policy Audit & Transition Planning

We evaluate your current DMARC setup and identify what needs to be adjusted for DMARCbis compliance - like rethinking your use of pct or implementing the new np tag.

✅ Subdomain Strategy Development

With the introduction of the np tag, we help you build tailored policies for subdomains that balance deliverability and protection.

✅ Organizational Domain Discovery Checks

Our tools ensure that your domains (especially those using public suffixes or complex hierarchies) are properly aligned with DMARCbis’s new discovery methods.

✅ Hands-on DNS Configuration & Monitoring

From DNS record management to implementing policy changes in production, we manage the heavy lifting - while giving you full visibility.

✅ Ongoing Reporting & Support

We continue to monitor and adjust your DMARC policies over time, ensuring they evolve as DMARCbis becomes widely adopted and enforced.

The Path Forward

DMARCbis is not here just yet, but it is coming fast. Organizations that take initiative-taking steps now will be ahead of the curve - better protected, more compliant, and more trusted by mailbox providers and recipients alike.

🔗 Read the full DMARCbis draft here: IETF DMARCbis Draft

🔐 Need help preparing? Excedo is here to guide you.

Contact us for a free consultation: