WILMINGTON, Del., Feb. 24, 2026, CyberNewswire — Sendmarc has released a new fireside chat featuring Todd Herr, Principal Solutions Architect at GreenArrow Email and co-editor of DMARCbis, on the upcoming update to DMARC (Domain-based Message Authentication, Reporting, and Conformance). Led … (more…) The post News alert: Sendmarc highlights impact of DMARC update on evolving email security standards first appeared on The Last Watchdog.

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Sendmarc has released a fireside chat with Todd Herr, co-editor of DMARCbis and Principal Solutions Architect at GreenArrow Email, discussing the upcoming update to the DMARC standard. DMARCbis (draft-ietf-dmarc-dmarcbis-41) is progressing through the IETF standards process and is intended to obsolete RFC 7489. Key updates include record tag clarifications to reduce ambiguity, clearer reporting expectations, and a standardized DNS tree walk for receiver-side policy discovery. Herr characterizes DMARCbis as an evolution rather than a revolution, and addresses misconceptions such as the idea that publishing a DMARC record alone guarantees inbox delivery. Major mailbox providers like Microsoft, Google, and Yahoo have already tightened sender requirements around DMARC, SPF, and DKIM.