On Fri, Jun 14, 2019 at 12:25 PM Vladimir Dubrovin <dubrovin= 40corp.mail...@dmarc.ietf.org> wrote:
> Nope, I mean 2 different things. > > 1. Why quarantine is useful (with pct=0). > > For example this mailing list (dmarc@ietf.org) performs From rewrite (aka > From munging), e.g. dubro...@corp.mail.ru is replaced with > dubrovin=40corp.mail...@dmarc.ietf.org. It's because corp.mail.ru has a > strict DMARC policy (reject). dotz...@gmail.com is not overwritten, > because gmail.com has p=none and ietf.org only overwrites From only for > domains with "quarantine" and "reject" policies. It's quite common behavior. > > If you are implementing DMARC for a new domain (let's say example.org), > you usually start with "p=none". With p=none you receive reports for failed > DMARC for different lists, like ietf.org. Before switching to stronger > policy (p=reject), you may want to know which mailing list will still fail > DMARC, and which lists perform From munging and, as a result, do not fail > DMARC. For this purpose, before switching to "p=reject" it's useful to > switch to "p=quarantine;pct=0". After this, you will only see mailing lists > without From munging in DMARC reports. > I'm confused; is this claiming that those rewrites happen by virtue of the fact that "p=quarantine" is the published policy? Seems to me that rewriting will happen irrespective of what the published policy is for the >From domain. Or is it the case that this changes the content of the aggregate reports in a way you find meaningful? -MSK
_______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
