email authentication
2 articles
DMARC's New Rulebook: What RFC 9989 Changes for Senders
The IETF replaced RFC 7489 with RFC 9989, 9990 and 9991 in May 2026. Here is what actually changed in DMARC, what didn't, and the records you should fix.
SPF, DKIM, and DMARC: The 2026 Email Authentication Setup Guide
Set up SPF, DKIM, and DMARC the right way for the 2026 bulk sender rules from Gmail, Yahoo, and Microsoft. A step-by-step guide with the exact DNS records.