On Mon, Dec 23, 2024 at 23:54 Jim Fenton <[email protected]> wrote:
> > > But your earlier concern about causing a breaking change to SPF-only DMARC > users has me puzzled. Can mail receivers only implement SPF verification > under DMARC? Or was the reference to SPF-only DMARC users talking about > senders who only have SPF records and don’t sign with DKIM? The latter. See https://mailarchive.ietf.org/arch/msg/dmarc/p4yFLKWTCjmoR7XbOiOY6P7OoiM/ for some numbers on the topic that I posted last year. — Todd
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