On 7/7/2017 1:44 PM, Steve Atkins wrote:
That a particular major ISP uses (or claims to use, or used to claim to use) selectors to identify particular senders is (or was, or was and continues to be) a major reason that some ESPs refuse to rotate keys at all.
Then it would be helpful to the industry to attempt to get that ISP to change it's behavior.
Whether it would help to issue a BCP, which explicitly directs receivers not to factor selector into filtering analysis and provides a detailed explanation of why such factoring is problematic, is something I'll ask and then leave it to others to decide about...
d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
