It appears that Bryan Fields via NANOG <nanog@lists.nanog.org> said:
On 5/23/25 16:56, Michael Thomas via NANOG wrote:
Not DKIM, DMARC to be more precise. I'm certain that close all of the domains people are sending from if they have a DMARC record, it's p=none which shouldn't trigger the 822.From rewrite, but that's what seems to be happening.
lists.nanog.org is configured to rewrite the from regardless of DMARC setting.
Yup. Not a great choice.
Even if you have p=none, it still shows as a broken signature on the email and will be rejected by google/MS/etc. They are large enough to violate the standards and we all have to submit, unless you pay for delivery to their customers.
Sorry, but this is nonsense. Please, sir, step away from the kool-aid. They aren't perfect but that kind of conspiracy theory helps nobody. I run mailing lists that have lots of subscribers at large providers, They only rewrite sender addresses when DMARC policies require it, and they get mail delivered just fine. R's, John