On Fri, Jun 19, 2020 at 1:23 PM Dotzero <[email protected]> wrote: > > > On Fri, Jun 19, 2020 at 1:09 PM Jim Fenton <[email protected]> wrote: > >> On 6/19/20 6:06 AM, Douglas E. Foster wrote: >> > DMARC helps establish a verified identity. Delivery is based on >> > reputation. The two are very different. >> > >> > Unwanted mail with DMARC validation will be blocked on the same basis >> > is unwanted mail without it. >> > >> > But a verified identity is helpful for ensuring that wanted mail is >> > not blocked. >> >> A verified identity is established by DKIM and/or SPF. What is DMARC >> adding in this respect? >> >> Policy expressed by the domain owner/administrator based on some > combination of DKIM and/or SPF and the feedback loop. > > Not only that, but DMARC is the only one of the three that is necessarily tied to the domain in the (usually) visible in the MUA From header.
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