Hello, for me this wording of pct=0 is not clear enough, why the value is necessary. Why the value is necessary can be explained by:
When seeing pct=0 mail intermediaries should munge the From: header. This allows mail operators to detect problems with DMARC deployment, before strict DMARC policy is applied. Greetings Дилян On Fri, 2021-07-30 at 16:06 -0400, Todd Herr wrote: > Following on to the recent discussion about the pct tag, and > specifically the disallowing of any values other than 0 and 100, I > propose the following text and look forward to your comments: > > pct: (plain-text integer; OPTIONAL; default is 100). For the > RFC5322.From domain to which the DMARC record applies, the > "pct" > tag is the percentage of messages producing a DMARC result of > "fail" to which the Domain Owner wishes its preferred handling > policy be applied. However, this MUST NOT be applied to the > DMARC-generated reports, all of which must be sent and received > unhindered. Possible values are as follows: > > 0: A request that zero percent of messages producing a DMARC > "fail" result have the specified policy applied. While this > is > seemingly a non-sensical request, this value has been given > special meaning by some mailbox providers and intermediaries > when combined with "p=" values other than "none". In those > cases, in can result in changes to message handling, and/or > DMARC reporting for the domain publishing such a policy. In > some instances of altered reporting, it is possible that the > altered reports may reveal intermediaries whose handling of > the > domain owners' mail could cause it to produce a DMARC result > of > "fail" when it reaches its final destination. > > 100: The default, in which a request is made that every > message > that produces a DMARC "fail" result will be subject to > application of the specified policy. > > I'll check on this thread on Monday to see where things stand... > > _______________________________________________ > dmarc mailing list > dmarc@ietf.org > https://www.ietf.org/mailman/listinfo/dmarc _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
