[dmarc-discuss] Impact of "none" policy?

[Murray S. Kucherawy]

> -----Original Message-----
> From: dmarc-discuss-bounces at blackops.org [mailto:dmarc-discuss-bounces at blackops.org] On Behalf Of Maarten Oelering
> Sent: Tuesday, March 27, 2012 3:33 AM
> To: dmarc-discuss at dmarc.org
> Subject: [dmarc-discuss] Impact of "none" policy?
> 
> I am helping a large financial to prepare for DMARC and strict
> authentication policies. With SPF and DKIM on the way we would like to
> publish a DMARC record with a "none" policy.
> 
> However, we want to be absolutely sure that the "none" policy does not
> have any effect on the filtering or presentation of the emails. I heard
> a rumor that even a "none" policy caused specific warnings to be shown
> in Gmail or Hotmail, but I was unable to confirm this with testing.
> 
> Did anyone in this group also see changes in delivery with a "none"
> policy? Or can I safely assume that it will have absolutely zero impact
> on email delivery? I know you can call this a "stupid" question, but
> there is much at stake, so I need to be 100% sure.

I suspect people know that "none" really means "none", but failures of DKIM or SPF independent of DMARC can still cause the receiver to do something with the message.

If anyone can show evidence that a DMARC "none" is actually causing problems, we should investigate why that is.  If there's something in the document that caused a receiver to do something like that, we should figure out how to fix it.

-MSK