DMARC Is Now a Proper Internet Standard: What Changed in RFC 9989/9990/9991
DMARC has been elevated to a proper Internet standard with the release of RFC 9989, 9990, and 9991. This change reflects over a decade of deployment experience and aims to improve email security. Key updates include a new DNS Tree Walk method for domain boundary determination and the introduction of new tags for better policy management.
- ▪RFC 9989 replaces RFC 7489 and elevates DMARC to Standards Track.
- ▪The DNS Tree Walk method replaces the Public Suffix List for determining organizational domain boundaries.
- ▪New tags such as 't' for test mode and 'np' for non-existent subdomain policy have been introduced.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3880804) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Mike Pultz Posted on May 22 DMARC Is Now a Proper Internet Standard: What Changed in RFC 9989/9990/9991 #email #dns #webdev #security DMARC has been an Informational RFC since 2015. That changed this month. RFC 9989 replaces RFC 7489 and elevates DMARC to Standards Track, reflecting over a decade of deployment experience and near-universal adoption across the email ecosystem.
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