I think I may not be understanding the problem. In the situation cited by Dave, [email protected] wants to have an ESP send mail on its behalf using the small business domain (i.e. FROM:@smallbusiness.com).
In that situation, why wouldn't small business get a DKIM key and unique selector and publish that in DNS, expanding the existing SPF record to include the relevant addresses of the ESP? In my experience, isolating that traffic using a subdomain (e.g. @esp.smallbusiness.com) for the from address would be preferred for operational and forensic purposes. The only role I can see Yahoo playing is taking responses to that traffic that originated from the ESP as indicated in the MX record for smallbusiness.com if that's what is desired. -----Original Message----- From: Dave Crocker [[email protected]<mailto:[email protected]>] Sent: Saturday, June 07, 2014 07:22 AM Eastern Standard Time To: Franck Martin Cc: Vlatko Salaj; Stephen J. Turnbull; DMARC Discussion; Popowycz, Alex; Talamo, Victor Subject: Re: [dmarc-ietf] confusing 3rd party support so it remains out On 6/7/2014 1:01 PM, Franck Martin wrote: > So I think requesting an ESP to do SPF and DKIM using your domain is not > impossible, I think the issue, is a problem of scale at the moment. Few have > “press a button” solution, and it is still a manual configuration, but I > suspect, they will scale from manual to automatic setup to support any domain > DMARC policies as more customers request the features. Perhaps I am missing something basic, but I would think that the larger barrier here is to make it easy for the domain owner to permit such signing by third-parties. To take an obvious example, [email protected] wants to use small-ESP for sending mail to small-business' customers. How does small-business get Yahoo to readily delegate signing authority to small-ESP? d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
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