>5) Set p=reject without taking this advice into account and then be shocked >and horrified that mail >you wanted to deliver is rejected.
It's worse than that. If you set p=reject and send mail to lists, you will hurt innocent bystanders. If recipients implement DMARC in good faith and do what it says, and your mail starts arriving from lists, the recipients will reject that mail, which the lists will see as delivery failures. With enough delivery failures, those recipients will be bounced off the list due to your malfeasance. This exact thing happened on some IETF lists when DKIM was young and some MTA operator overimplemented ADSP and treated "discard" as reject. The right thing to do is not to send mail to lists from domains that have a policy other than p=none. I agree with your outline of the reasonable options. R's, John PS: The fact that this hasn't happened even though we know at least one contributor to this list uses p=reject suggests that recipients aren't taking DMARC all that seriously. At this rate, they never will. _______________________________________________ dmarc-discuss mailing list [email protected] http://www.dmarc.org/mailman/listinfo/dmarc-discuss NOTE: Participating in this list means you agree to the DMARC Note Well terms (http://www.dmarc.org/note_well.html)
