It appears that Jeremy Harris <[email protected]> said: >On 18/12/2021 03:47, Douglas Foster wrote: >> MX checks are a valid tool for assessing SMTP MailFrom addresses, since the >> sender is supposed to be ready to accept non-delivery reports and other >> automated messages. Of course, this has applicability if (but only if) >> the RFC5322.From domain is the same as the RFC5321.MailFrom domain. > >I disagree. It is well-established practice for a mailing list manager >to accept and process NDRs accepted on the 5321.mailfrom (which differs >from the 5322.from).
Jeremy is right. Mailing lists always, and I mean always, put their own 5321 bounce address on the messages so they can do bounce management. If you look at the mail from this list, the bounce address is [email protected]. I have to say I am dismayed that we are spending time dealing with such utterly basic misconceptions here. R's, John _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
