On Sun, Jul 26, 2020 at 9:42 AM Dave Crocker <d...@dcrocker.net> wrote:
> On 7/21/2020 12:32 PM, Dotzero wrote: > > The original DMARC effort was, in fact, to detect actual cases of >> spoofing, namely unauthorized use of a domain name by outside actors. >> >> Different problem. >> > > Actually, part of the effort was to enable Sending domains to identify > their own mail that was being sent without aligned DKIM signing or from > places not authorized through SPF - in other words, not properly authorized > but legitimate, hence feedback loops. > > > As I recall, this was /not/ part of the original purpose of DMARC, which > was discussed strictly in terms of mail from bulk senders. > > What you describe was, rather, the basis for the later use, which is what > then started causing problems for mail going through Mediators. > Notice I didn't use the word "users" Many of the sending domains in the original effort had/have a complex number of mail streams for transactional mail from multiple domains (in some cases thousands), including through multiple 3rd parties. This is what I was referring to. Michael Hammer.
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