Hi, Le 07/07/2023 à 23:58, John R Levine a écrit : > > Why is it up to the recipient systems (the ones that do not care) to > make life easier for lists? Mailing list packages already do lots of > analysis of bounce messages. How about if they fix their bounce > processing to recognize DMARC failures and do something different.
Why? Because it's brittle and will only bring them more headaches? At the very least, DMARC would need to use its own 5xy reply code to avoid the need for parsing the reply text… Or simply because they are *not* DMARC participants, and thus have no reason to read this list? Standards usually serve to organize interoperability between participants, not to inflict demands upon unrelated third parties that they knowingly break. That being said, maybe there is some simpler and better advice we can give to mailing list operators who happen to listen: "If messages bounce, first try to forcibly set the digest sending mode for this user. If digests bounce too, then it's not DMARC, unsubscribe as usual". If the mailing list software has a digest mode, implementation is straightforward, and I can see no downsides compared to unsubscribe right from the start. Cheers, Baptiste _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
