On Sat, Aug 5, 2023 at 1:09 PM Tim Wicinski <tjw.i...@gmail.com> wrote:
> Based on the ABNF in -28, how about something like this: > > > dmarc-method = "dkim" / "spf" > > dmarc-auth = "auth" equals dmarc-method *(*WSP "," *WSP dmarc-method) > > > I think this "should"(*) allow for all permutations but also simplifies > it, and I agree with Barry it should be simpler. > This looks good to me, except to be consistent with DKIM (from which this general syntax was borrowed) I'd suggest: * using colon as the separator rather than comma * WSP and CFWS should follow whatever we did for other tags * don't allow an empty list; I can't think of any DKIM or DMARC tag that accepts a list and also allows an empty value If we think we might add "arc" or something else in the future, do we need a registry of supported methods? If not, we'll have to rev DMARC every time a new one comes into favor. -MSK, participating
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