I think I just saw my first DMARC report for a customer. I'd to check w/ the group & see if my understanding of its meaning & action implications are correct.
The customer was sending to Yahoo. They got a few bounces from Yahoo w/ this bounce reason: 554 5.7.5 (AU01) Message not accepted for policy reasons. See http://postmaster.yahoo.com/errors/postmaster-28.html They also had a lot of deferrals, but most of those seem to have eventually resolved into deliveries. I got a report from the customer that I think was a DMARC failure report, but the customer didn't actually identify it as such. It had this for the Authentication-Results: Authentication-Results: mta1203.mail.ac4.yahoo.com from=unknown; domainkeys=neutral (unknown); from=unknown; dkim=neutral (unknown) However, there were DKIM x-headers in the message. I also saw some temporary network failure messages for the same customer at the same time from Yahoo. My theory is that Yahoo had a little bit of trouble looking up the DKIM public keys in DNS at the time, thus resulting in the DKIM authentication failure, but that this only bounced a few messages and was soon corrected. So, no action needed to be taken by me or the customer as far as straightening things out w/ Yahoo. Is this right? If I'm right, what would be different in this type of scenario that would make it appropriate, if ever, to contact a mailbox provider about this sort of thing? Tim Starr Senior Deliverability Engineer Sendgrid _______________________________________________ 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)
