On Tue, Jul 22, 2025 at 4:41 PM Dave Crocker <[email protected]> wrote:
> This appears to be derived from DMARC, except that DMARC only mandates > this when SPF is used. The current work seeks to mandate it always. So > it requires both Mail From and From: to be aligned with the (same?) > signature. > Can you point me to the SPF-specific constraint? I thought DMARC required alignment for both SPF and DKIM in order to consider their "pass" results as usable. That is, a passing DKIM signature for a domain unrelated to the RFC5322.From domain is discarded by DMARC. -MSK
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