[dmarc-discuss] DMARC rejections on domain with no DMARC record

Tim Draegen tim at eudaemon.net
Mon Jun 30 11:25:07 PDT 2014


On Jun 30, 2014, at 2:13 PM, John Levine via dmarc-discuss <dmarc-discuss at dmarc.org> wrote:
> I just saw a blizzard of DMARC rejects on a mailing list message from
> a subscriber with an address at netscape.net.  (Yes, there still are a
> few.)  That domain belongs to AOL, but publishes no DMARC record.
> 
> So how come AOL, Yahoo, Comcast, and Hotmail rejected it with SMTP
> errors that clearly said it was a DMARC rejection?  It's hard enough
> to deal with DMARC as implemented.  It's impossible to deal with it if
> there are sekrit rules that normal people don't know about.

I've been hearing about similar scenarios, but haven't seen an actual long line to debug.  IMO this behavior would be an implementation bug.  Can you offer up the (redacted?) message + reject lines to get this chased down?

=- Tim


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