RFC 9989 Is Here: How Excello Mail Already Supports the New DMARC Standard

Wed, 20 May 2026 08:00:00 +0000

The IETF published RFC 9989 on May 12, 2026, finalizing the work that the email security community has been calling “DMARCbis” for the past five years. It is the first substantive revision of DMARC since RFC 7489 shipped in 2015, and it carries enough changes that every DMARC monitoring platform, every report receiver, and every domain owner publishing a record needs to pay attention.

We have been tracking the draft through forty-one revisions inside the IETF DMARC working group. Today we are happy to confirm that Excello Mail already parses, validates, and generates DMARC records using the new RFC 9989 tag set, and that our aggregate report ingestion pipeline reads the RFC 9990 schema additions out of the box.

Rfc9989 on Daily DMARC News

RFC 9989 Is Here: How Excello Mail Already Supports the New DMARC Standard