On Fri, May 2, 2014 at 7:52 AM, John R Levine <[email protected]> wrote:
> The advice hasn't changed: don't set a DMARC policy other than p=none on > domains used by human users. We know that some large domains have > disregarded that advice, but it doesn't make it any less correct. > Given that this is the world we live in now, maybe it's a good idea to say, "... because when you do, the following will break: mailing-list posts, "forward this article" links, ... (etc.)" The problem being that it's probably impossible to characterize all of the email edge cases and side effects individual users have become accustomed to, though from the current screams of pain, we can probably deduce which ones are the most prevalent. It's not at all clear to me whether the pressure will build up to convince the large domains to roll back their policies, or to convince myriad small providers and web page designers to adjust theirs. The only places I've even heard about deployed DMARC policies breaking mailing lists, are this mailing list and the IETF one. J
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