On Thu, May 30, 2019 at 9:06 AM Richard C <Richard.C= 40ncsc.gov...@dmarc.ietf.org> wrote:
> What would be the best way to incorporate this requirement? > The simplest possible way to address this use case is just to make sure those existing but currently non-compliant domains just have a bare p=none record. Then they'll never fall back to the gov.uk record. There's no risk to inadvertently breaking mail here. It it remotely realistic for you to offer this guidance? If you're already saying that p=reject is required, how painful is it to advertise that any domain without a DMARC record will get p=reject by default unless it explicitly puts p=none in? Seth
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