Authentication on Sender Audit Bloghttps://senderaudit.com/blog/en/tags/authentication/Recent content in Authentication on Sender Audit BlogHugoenFri, 19 Jun 2026 00:00:00 +0000DMARCbis Explained: Changes, Implications for Senders and Receivershttps://senderaudit.com/blog/en/dmarcbis-explained/Fri, 19 Jun 2026 00:00:00 +0000https://senderaudit.com/blog/en/dmarcbis-explained/<p>In May 2026, the IETF officially published <strong>DMARCbis</strong> — 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: <strong>RFC 9989</strong>, <strong>RFC 9990</strong>, and <strong>RFC 9991</strong>.</p> <p>But what actually changes? Is this a revolution or an evolution? What are the concrete implications for you — whether you&rsquo;re a <strong>domain administrator</strong>, <strong>email service provider</strong>, or <strong>email security specialist</strong>?</p>