[dmarc-discuss] How does *this* mailing list interact with dmarc?

Michael Adkins madkins at fb.com
Mon Jun 25 10:10:28 PDT 2012



On 6/24/12 6:03 AM, "Steven Chamberlain" <steven at pyro.eu.org> wrote:

>Are facebook.com users able to send outgoing mail?

Yes.


>The p=reject policy
>means that anyone who mailed this list would be blocked by some
>receiving mailservers (163.com didn't recognise the list last time I
>checked), and you would receive false-positive reports.

Correct.  It's been that way for over a year and no one's complained yet.


>
>Receivers may start to think DMARC verification has too many false
>positives and relax the weight they give to a DMARC failure.  Then it
>erodes the effectiveness of DMARC at filtering out phishing mails from
>facebook.com and for other big brands.

I hasn't yet.  I don't expect it to in the future.




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