On 03/12/2016 01:00 AM, John C Klensin wrote:
The IETF should not be encouraging experiments on the public Internet that could be harmful to the Internet or to existing deployed applications, especially standards-track ones. Several people with significant email operational experience have made the claim that this experiment could be harmful to the Internet's email infrastructure, if only by encouraging a violation of a fairly explicit (and very important, IMO) provision of SMTP. As far as I can tell from reviewing the discussions, there has not even been effort to refute those claims or explain why they are not relevant.
Has anyone laid out the perceived dangers in an easily digestible format? I would be interested to see that discussion.
Given that the DNS RR in question is something the end user has to explicitly request, the danger is not immediately obvious to me.
Doug